Every page starting with C
494 pages, in alphabetical order, each with the description it carries. A page filed under its own name rather than a prefix: a suburb page sorts by the suburb, and a title beginning with NZ sorts by the word after it.
Nothing on this letter matches that. Try the full A to Z.
-
Cable Impedance Calculator
Work out the characteristic impedance of a coaxial cable from its conductor sizes and dielectric constant, with capacitance and inductance per metre.
-
Cable Size Calculator NZ
Enter amps, voltage and cable run length to get the minimum conductor size in mm² and AWG, based on the AS/NZS 3000 Wiring Rules.
-
CAC Calculator
Calculate your Customer Acquisition Cost (CAC) from your sales and marketing spend divided by the new customers acquired. A core SaaS unit-economics metric.
-
CAC Payback Period Calculator
Calculate your CAC payback period: the months it takes to recover customer acquisition cost from gross profit. Enter CAC, monthly revenue and gross margin.
-
CAC Ratio Calculator
Work out your CAC ratio from new ARR, gross margin and acquisition spend. See gross profit on new ARR divided by CAC to judge sales and marketing return.
-
Caesar Cipher & ROT13 Calculator NZ
Encode or decode text with a Caesar cipher or ROT13. Choose any shift to encrypt a message by shifting letters through the alphabet. Runs in your browser.
-
Caffeine Calculator
Add up your daily caffeine from coffee, tea, energy drinks and cola, and see how it compares with the 400 mg general adult guideline.
-
CAGR Explained
Learn how to calculate and use Compound Annual Growth Rate (CAGR) to measure investment performance and business growth over time.
-
Housing in Cairnbrae
What housing costs in Cairnbrae, Ashburton District: median weekly rent $200, the ownership and renting split, and household income, from the 2023 Census.
-
Cake Pan Converter
Convert a cake recipe between pan sizes by comparing pan areas. Get the scaling factor for round or rectangular tins and rescale your ingredients.
-
Cake Pricing Calculator
Work out what to charge for a cake. Add up ingredients, labour and overhead, apply your markup, and see the selling price, profit and price per serving.
-
Cake Serving Calculator
Work out how many servings your cake makes. Enter the shape and size and the serving style to see how many people a round or rectangular cake will feed.
-
Calculator Library Changelog
A dated record of what has been added, updated and reviewed on Calculate.co.nz, so you can see the library is actively maintained.
-
Calculus and functions questions, answered
Derivatives and integrals, limits, functions and their inverses, and the notation that goes with them.
-
Calendar Calculator
Look up everything about a single date: the day of the week, the day of the year, the ISO week number and how much of the year is still left.
-
Calibration Curve Calculator
Enter standard data points to get the best-fit line y = mx + b with its R² value, and back-calculate unknown concentrations from measured signals.
-
Call Option Calculator
Work out the profit, loss and break-even on a long call option. Enter the strike, premium, contracts and stock price at expiry to see your return.
-
Calorie Calculator
Free calorie calculator. Find out how many calories you need per day to maintain, lose, or gain weight.
-
Calorie Deficit Calculator NZ 2026
Calculate your daily calorie needs, BMR, and TDEE, then set a safe calorie deficit for weight loss. Includes a 7-day calorie plan.
-
Calories Burned Calculator
Calculate kilojoules and calories burned for 30+ activities. Enter your weight, activity and duration. Shows kJ, kcal and equivalent food items.
-
Housing in Calton Hill
What housing costs in Calton Hill, Dunedin City: median weekly rent $300, the ownership and renting split, and household income, from the 2023 Census.
-
Calving Date Planner NZ
Work back from your planned start of calving to the mating start date, then forward through the calving spread.
-
Housing in Camberley
What housing costs in Camberley, Hastings District: median weekly rent $200, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Camborne
What housing costs in Camborne, Porirua City: median weekly rent $550, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Cambridge Central
What housing costs in Cambridge Central, Waipa District: median weekly rent $440, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Cambridge East
What housing costs in Cambridge East, Waipa District: median weekly rent $470, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Cambridge North
What housing costs in Cambridge North, Waipa District: median weekly rent $680, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Cambridge Park-River Garden
What housing costs in Cambridge Park-River Garden, Waipa District: median weekly rent $620, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Cambridge West
What housing costs in Cambridge West, Waipa District: median weekly rent $496, the ownership and renting split, and household income, from the 2023 Census.
-
Camera Field of View Calculator
Calculate a camera's field of view and angle of view. Enter focal length, sensor size and distance to get horizontal, vertical and diagonal coverage.
-
Housing in Cameron and Soldiers Park
What housing costs in Cameron and Soldiers Park, Masterton District: median weekly rent $370, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Campbells Bay
What housing costs in Campbells Bay, Auckland: median weekly rent $700, the ownership and renting split, and household income, from the 2023 Census.
-
Camping Trip Cost Calculator NZ
Estimate the total cost of a camping trip in New Zealand. Add campsite fees, fuel, food and activities to see the total and the cost per person.
-
Housing in Campus North
What housing costs in Campus North, Dunedin City: median weekly rent $573, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Campus South
What housing costs in Campus South, Dunedin City: median weekly rent $652, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Campus West
What housing costs in Campus West, Dunedin City: median weekly rent $459, the ownership and renting split, and household income, from the 2023 Census.
-
Can I Afford to Hire?
Deciding on a first hire: the real cost beyond the wage, the revenue the role must carry, and how long before it pays for itself. NZ.
-
Housing in Cannons Creek East
What housing costs in Cannons Creek East, Porirua City: median weekly rent $180, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Cannons Creek North
What housing costs in Cannons Creek North, Porirua City: median weekly rent $250, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Cannons Creek South
What housing costs in Cannons Creek South, Porirua City: median weekly rent $250, the ownership and renting split, and household income, from the 2023 Census.
-
Cantilever Deflection Calculator NZ
Calculate the tip deflection of a cantilever beam with an end point load, from the load, length, modulus and second moment of area. See the maximum bending moment.
-
Cap Rate Calculator NZ
Work out the capitalisation rate on a rental from its net operating income and value. Enter rent, costs and price to see the cap rate, NOI and gross yield.
-
Cap Table Calculator
Model a startup cap table and a funding round. Enter shares, pre-money valuation and the raise to see the new investor stake, post-money value and dilution.
-
Capacitance Calculator
Calculate capacitance of a parallel plate capacitor from dielectric constant, area and separation. Also computes charge Q=CV and energy stored.
-
Capacitive Reactance Calculator (Xc = 1 / 2πfC)
Calculate capacitive reactance (Xc) from frequency and capacitance using Xc = 1 / (2πfC). Enter values in Hz and microfarads. Instant results in ohms with worked example.
-
Capacitor Charge & Discharge Calculator NZ
Calculate the voltage on a capacitor at any time while charging or discharging through a resistor. Enter capacitance, resistance, supply voltage and time.
-
Capacitor Charge Calculator NZ
Calculate the charge stored on a capacitor, the energy it holds, and the RC time constant. Enter capacitance, voltage and resistance for instant results.
-
Capacitor Charge Time Calculator
How long a capacitor takes to charge in an RC circuit: the time constant from R and C, voltage at any moment, and time to a target voltage.
-
Capacitor Code Calculator
Decode a capacitor code to its value in pF, nF and uF. Free capacitor code calculator for 3-digit EIA codes and tolerance letters, for example 104 = 100nF = 0.1uF.
-
Capacitor Energy Calculator
Energy stored in a capacitor from capacitance and voltage, with the stored charge Q = CV and the discharge time constant if resistance is given.
-
Capacitor Size Calculator
Calculate the required capacitor size for power factor correction or RC filter design. Enter load power, power factor, and voltage to find the capacitance in microfarads.
-
Capacitors in Series and Parallel Calculator
Calculate the total capacitance of capacitors in series and in parallel from a list of values. Free capacitors in series and parallel calculator with the formulas.
-
Housing in Cape Hill
What housing costs in Cape Hill, Auckland: median weekly rent $620, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Cape Rodney
What housing costs in Cape Rodney, Auckland: median weekly rent $430, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Cape Runaway
What housing costs in Cape Runaway, Ōpōtiki District: median weekly rent $200, the ownership and renting split, and household income, from the 2023 Census.
-
Capital Budgeting Calculator
Appraise a project in one place. Enter the initial cost, discount rate and yearly cash flows to see NPV, IRR, payback period and profitability index.
-
Capital Gains Tax (CGT) Calculator
Calculate capital gains tax on property, shares, or any asset. Enter purchase price, sale price, and your CGT rate to see tax owed, net gain, and yield.
-
Capital Gains Tax NZ
Learn how NZ's capital gains tax rules apply to property, shares, and investments. Understand bright-line test, intention test, and tax obligations.
-
Capital Gains Yield Calculator
Work out the capital gains yield on a share from its buy and sell price. See the price return, total return with income, annualised return and dollar gain.
-
Capital Growth vs Yield Calculator NZ
Split a NZ rental property's total return into rental yield and capital growth, and see how much comes from income versus the property rising.
-
Capital vs Revenue Tax Calculator NZ
Estimate the tax difference if a gain is on revenue account (taxable) versus capital account (generally not taxed) in New Zealand. Enter the gain and your marginal rate.
-
CAPM Calculator
Calculate the expected return of any asset using the Capital Asset Pricing Model. Enter the risk-free rate, beta, and expected market return for an instant CAPM result.
-
CAPM Guide - Capital Asset Pricing Model
Learn how to use the Capital Asset Pricing Model (CAPM) to calculate expected returns on investments based on risk. Understand beta, risk-free rate, and market returns.
-
Capped Percentage Fee Effective Rate Calculator NZ 2026
A percentage fee with an annual cap: the income where the cap bites, the effective rate above it, and how the headline rate falls away. NZ.
-
Capsule Volume Calculator
Calculate capsule volume and surface area from radius r and cylinder height h. Returns volume, total surface area, hemisphere volume, and cylinder volume separately.
-
Car Affordability Calculator NZ
Work out the car price your budget can comfortably sustain in New Zealand, allowing for finance repayments and the running costs of owning a car.
-
Car Crash Calculator
Estimate the force of a car crash from speed, mass and crumple distance. See the average impact force, peak g-force, kinetic energy and impact speed.
-
Car Depreciation Calculator NZ
Free NZ car depreciation calculator. See how much value your car loses each year and what it will be worth, using the declining balance method.
-
Car Finance: Dealer, Bank or Pre-Approval
How to finance a car in NZ: dealer finance vs a bank or credit union loan, pre-approval, secured vs unsecured, total cost, balloon payments and your CCCFA rights.
-
NZ Car Insurance Calculator 2026
Free NZ car insurance premium estimator. Compare comprehensive, third party fire and theft, and third party only cover.
-
Car Insurance Types
The main types of car insurance in New Zealand: comprehensive, third party, third party fire and theft, and mechanical breakdown.
-
Car Loan Balloon Payment Calculator NZ 2026
Car loan repayments with a balloon: the lower monthly payment, the lump sum due at the end, and the extra interest the balloon costs. NZ.
-
Car Loan Balloon Payments
What a car loan balloon payment is, why it raises total interest, the negative equity and refinancing traps, your CCCFA rights, and how to compare deals.
-
Car Refinance Calculator NZ
Work out whether refinancing your car loan saves money. Compare your current and new loan payments, total interest, and break-even point.
-
Car Replacement Fund Calculator NZ
The monthly saving that replaces your car when it is due: set a target and timeframe, allow for the trade-in, and never borrow for a car again.
-
Car Running Costs NZ
What a car really costs to run in New Zealand: WOF, rego, road user charges, fuel, tyres, servicing, insurance and depreciation, with worked totals.
-
Carat Weight Calculator
Estimate the carat weight of a round diamond or gemstone from its diameter, depth and specific gravity. Free NZ calculator with a worked example.
-
Caravan Ownership Cost Calculator NZ
Work out the true annual cost of owning a caravan or motorhome in New Zealand, including registration, insurance, storage, servicing and the cost per trip.
-
Caravans and Motorhomes NZ
Only green self-containment warrants count from 7 June 2026, and a fixed toilet is required. What that changed, plus the cost per night nobody calculates.
-
Carbon Equivalent Calculator
Calculate the carbon equivalent (CEV) of steel from its composition using the IIW formula, and gauge weldability and preheat need. Free NZ calculator.
-
Carbon Footprint Calculator NZ 2026
Calculate your personal carbon footprint using New Zealand-specific emission factors. NZ electricity is 85% renewable, making this different from overseas tools.
-
Carburettor CFM Calculator
Work out the carburettor CFM your engine needs from its size, peak RPM and volumetric efficiency. Free NZ engine airflow calculator with a worked example.
-
Housing in Cardrona
What housing costs in Cardrona, Queenstown-Lakes District: median weekly rent $300, the ownership and renting split, and household income, from the 2023 Census.
-
Career Break Investment Impact Calculator NZ 2026/27
Free NZ calculator for the long-run cost of pausing investment contributions for parental leave, study or travel.
-
Carnot Efficiency Calculator
Calculate Carnot efficiency from hot and cold reservoir temperatures, or find the required reservoir temperature for a given efficiency.
-
Carpet and Flooring Area Calculator NZ
Work out the floor area of a room and how much carpet or flooring to buy in New Zealand, including a waste allowance for cuts, joins and offcuts.
-
Carpet Calculator NZ
Free NZ carpet calculator. Enter your room dimensions to work out the carpet area you need, with a waste allowance, and the total cost from a price per square metre.
-
Carpooling Savings Calculator NZ
See how much you save by carpooling in New Zealand, splitting fuel and running costs across riders.
-
Carrying Capacity Calculator
Calculate carrying capacity (K) using the logistic growth model. Find K from two population observations, or project population growth toward K.
-
Housing in Carterton North
What housing costs in Carterton North, Carterton District: median weekly rent $400, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Carterton South
What housing costs in Carterton South, Carterton District: median weekly rent $400, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Casebrook
What housing costs in Casebrook, Christchurch City: median weekly rent $430, the ownership and renting split, and household income, from the 2023 Census.
-
Cash Conversion Cycle Calculator
Work out your cash conversion cycle from days inventory, days sales and days payable. See how many days cash is tied up in operations.
-
Cash Drag Calculator NZ 2026/27
Free NZ calculator showing what holding money in cash costs against an invested alternative, after tax, fees and inflation.
-
Cash Flow Calculator
Work out net cash flow and your closing balance from opening cash, inflows and outflows. See where your cash position lands for the period.
-
Cash Runway Calculator
Work out your cash runway in months from cash on hand and monthly net burn. See how long your money lasts at the current rate of spending.
-
Cash vs Mortgage Calculator NZ
Compare buying a home with cash against keeping a mortgage and investing the difference in New Zealand.
-
Cash-on-Cash Return Calculator NZ 2026/27
Annual pre-tax cash flow divided by the cash you actually invested, before and after tax, with gross and net yield alongside. Free NZ calculator.
-
Cash-Out Refinance Calculator NZ
Enter your mortgage balance, home value and the cash you need to see the new loan amount, monthly repayment and total extra interest. NZ.
-
Cashback Clawback Calculator NZ 2026/27
Free NZ cashback clawback calculator. Work out what you'd owe your bank if you refinance or repay early, using the daily pro-rata clawback formula NZ banks use.
-
Cashflow Management Guide - NZ Personal Finance
Track income and expenses, manage timing mismatches and build buffers, whether you are employed, contracting or self-employed. NZ.
-
Cashflow vs Profit
NZ guide to cashflow vs profit: why profit doesn't pay bills, timing mismatch problems, irregular income/expenses, income smoothing, real scenarios.
-
Housing in Cashmere East
What housing costs in Cashmere East, Christchurch City: median weekly rent $500, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Cashmere West
What housing costs in Cashmere West, Christchurch City: median weekly rent $450, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Castlecliff East
What housing costs in Castlecliff East, Whanganui District: median weekly rent $395, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Castlecliff West
What housing costs in Castlecliff West, Whanganui District: median weekly rent $380, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Castor Bay North
What housing costs in Castor Bay North, Auckland: median weekly rent $765, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Castor Bay South
What housing costs in Castor Bay South, Auckland: median weekly rent $750, the ownership and renting split, and household income, from the 2023 Census.
-
Casual vs Permanent Calculator NZ
Compare a higher casual hourly rate against a permanent role with paid leave and security in New Zealand.
-
Cat Age Calculator
Convert your cat's age to human years using the standard veterinary scale. Free cat age calculator that reflects how cats age fast then steady.
-
Housing in Catlins
What housing costs in Catlins, Clutha District: median weekly rent $250, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Caversham
What housing costs in Caversham, Dunedin City: median weekly rent $346, the ownership and renting split, and household income, from the 2023 Census.
-
CC to Grams Converter
Convert cc (cubic centimetres) to grams for water, milk, flour, sugar, oil, honey and more.
-
CC to Litre Converter
Convert cubic centimetres (cc) to litres instantly. 1 cc equals 0.001 litres (1 mL). Also convert litres back to cc. Free online volume converter with worked examples.
-
CC to mL Converter
Convert cc to mL instantly. 1 cc equals exactly 1 mL. Also converts to litres, fluid ounces, teaspoons, and tablespoons. Free online volume converter.
-
CC to Oz Converter
Convert cubic centimetres (cc or mL) to fluid ounces instantly. Supports US fluid ounces and UK (imperial) fluid ounces.
-
CCF to Gallons Conversion Calculator
Convert CCF (hundred cubic feet) to US gallons instantly. 1 CCF = 748.052 US gallons. Free online converter for water billing and gas metering.
-
Ceasing Self-Employment Calculator NZ 2026
Work out the final tax year when you stop being self-employed in NZ: residual tax after provisional payments, and the GST wash-up on assets you keep.
-
Celsius Converter
Free Celsius converter. Instantly convert Celsius to Fahrenheit, Kelvin, and Rankine. Shows the formula, a worked example, and a quick-reference temperature table.
-
Celsius to Fahrenheit Converter
Convert Celsius to Fahrenheit instantly. Enter any temperature in degrees Celsius and get the exact Fahrenheit equivalent.
-
Cent to Square Metre Converter
Convert cents to square metres instantly. 1 cent = 40.4686 m². Also converts square metres back to cents. Used for land measurement in India, Sri Lanka and South Asia.
-
Housing in Centennial Crescent
What housing costs in Centennial Crescent, Gisborne District: median weekly rent $300, the ownership and renting split, and household income, from the 2023 Census.
-
Centimetres to Feet Converter
Convert centimetres to feet (cm to ft). One centimetre is 0.032808399 feet. Free converter with formula, a worked example and a quick-reference table.
-
Centimetres to Light years Converter
Convert centimetres to light years (cm to ly). One centimetre is 1.057001e-18 light years. Free converter with formula, a worked example and a quick-reference table.
-
Centimetres to Metres Converter (cm to m)
Free cm to m converter. Instantly convert centimetres to metres with the formula m = cm / 100. Includes reverse conversion, worked example, and common reference values.
-
Centimetres to Micrometres Converter
Convert centimetres to micrometres (cm to µm). One centimetre is 10,000 micrometres. Free converter with formula, a worked example and a quick-reference table.
-
Centimetres to Miles Converter
Convert centimetres to miles (cm to mi). One centimetre is 0.000006214 miles. Free converter with formula, a worked example and a quick-reference table.
-
Centimetres to Nanometres Converter
Convert centimetres to nanometres (cm to nm). One centimetre is 10,000,000 nanometres. Free converter with formula, a worked example and a quick-reference table.
-
Centimetres to Nautical miles Converter
Convert centimetres to nautical miles (cm to nmi). One centimetre is 0.0000054 nautical miles. Free converter with formula, a worked example and a quick-reference table.
-
Centimetres to Yards Converter
Convert centimetres to yards (cm to yd). One centimetre is 0.010936133 yards. Free converter with formula, a worked example and a quick-reference table.
-
Central Angle Calculator
Calculate the central angle of a circle from arc length and radius, or from sector area and radius. Instant results in degrees and radians with full working.
-
Centre of a Circle Calculator
Find the centre and radius of a circle from the general equation (x² + y² + Dx + Ey + F = 0) or from three points on the circle. Instant results with working shown.
-
Centre of Mass Calculator
Calculate the centre of mass of a set of point masses along a line from their masses and positions. Free centre of mass calculator with the formula.
-
Centrifugal Force Calculator
Free centrifugal force calculator. Enter mass, radius and speed (or angular velocity) to calculate centrifugal and centripetal force in newtons.
-
Centripetal Acceleration Calculator (a = v² / r)
Free centripetal acceleration calculator. Solve a = v squared / r for the centripetal acceleration, speed or radius of circular motion.
-
Centripetal Force Calculator
Calculate centripetal force from mass, speed, and radius using F = mv²/r. Returns centripetal force in newtons, centripetal acceleration, angular velocity, and period.
-
Centroid of a Triangle Calculator
Enter three vertex coordinates to find a triangle's centroid, the point where the three medians meet, instantly.
-
Cents to Dollars Calculator
Convert cents to dollars or dollars to cents instantly. Enter any amount in cents and see the dollar value, or reverse. Fast, free, accurate currency unit converter.
-
Cerebral Perfusion Pressure Calculator
Calculate cerebral perfusion pressure (CPP) from mean arterial pressure (MAP) and intracranial pressure (ICP). CPP = MAP - ICP. Normal CPP range 60-70 mmHg.
-
Chain Drive Calculator
Calculate a chain drive's ratio, output speed and torque multiplication from the driver and driven sprocket teeth. Free chain drive calculator with the formula.
-
Housing in Chapel Downs
What housing costs in Chapel Downs, Auckland: median weekly rent $550, the ownership and renting split, and household income, from the 2023 Census.
-
Character Counter
Free online character counter. Instantly count characters with and without spaces, words, sentences, and paragraphs.
-
Housing in Charing Cross
What housing costs in Charing Cross, Selwyn District: median weekly rent $250, the ownership and renting split, and household income, from the 2023 Census.
-
NZ Charitable Donation Tax Rebate Calculator 2026
Calculate your NZ charitable donation tax rebate. Donations of $5 or more to approved charities attract a 33.33% tax credit via IR526. Payroll giving compared too.
-
Charity FBT Calculator NZ 2026
Free NZ FBT calculator for charitable organisations. Tests the lesser of $1,200 or 5% of salary threshold for short-term charge facilities and vouchers. 2026 rules.
-
Charles's Law Calculator
Charles's Law Calculator: solve V1/T1 = V2/T2 for any unknown. Enter volume and temperature values in any unit. Ideal for chemistry and physics students.
-
Housing in Charleston (Buller District)
What housing costs in Charleston (Buller District), Buller District: median weekly rent $150, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Charleston (Christchurch City)
What housing costs in Charleston (Christchurch City), Christchurch City: median weekly rent $375, the ownership and renting split, and household income, from the 2023...
-
Housing in Chartwell
What housing costs in Chartwell, Hamilton City: median weekly rent $412, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Chatswood
What housing costs in Chatswood, Auckland: median weekly rent $720, the ownership and renting split, and household income, from the 2023 Census.
-
Chattel Depreciation Calculator NZ
Work out the diminishing value depreciation on a chattel for a New Zealand rental property or business asset. See the yearly claim, total depreciation and book value.
-
Chattels Schedule Value Calculator NZ
Value the chattels listed in a New Zealand sale and purchase agreement, both at replacement cost for insurance and at present worth for negotiation.
-
Chattels: What Stays With the House in NZ
The chattels schedule in a New Zealand sale, the working order warranty, and how to avoid the disputes that start on settlement day.
-
Cheaper Rent Further Out: When the Commute Eats the Saving
Whether a cheaper suburb further from work actually saves money once the commute is priced, using real NZ rents by area and the IRD kilometre rate.
-
Check Your Credit Report for Free
Check your NZ credit report for free from Centrix, Equifax and Experian (formerly illion), understand your credit score, fix errors, and freeze your file after fraud.
-
Checking a Financial Adviser Is Registered
How to check a financial adviser is licensed and registered in New Zealand, what the rules require, the questions to ask, and how to spot someone who is not legitimate.
-
Checksum Digit Calculator
Free checksum digit calculator. Enter a number to get a simple modulo 10 check digit from its digit sum, used to catch typing errors.
-
Housing in Chedworth
What housing costs in Chedworth, Hamilton City: median weekly rent $550, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Cheltenham
What housing costs in Cheltenham, Auckland: median weekly rent $616, the ownership and renting split, and household income, from the 2023 Census.
-
Chemical Equation Balancer
Balance a chemical equation automatically. Enter reactants and products and get the smallest whole-number coefficients. Free chemical equation balancer.
-
Chemistry questions, answered
Moles and molarity, pH and acids, dilution and concentration, reaction energy and the gas laws.
-
Housing in Chertsey
What housing costs in Chertsey, Ashburton District: median weekly rent $200, the ownership and renting split, and household income, from the 2023 Census.
-
Chi-Square Calculator
Calculate chi-square statistics from observed and expected frequencies. Enter your category counts for the chi-square value, degrees of freedom and the result at 0.05.
-
Chi-Square Goodness of Fit Calculator NZ
Calculate the chi-square goodness-of-fit test statistic from observed and expected frequencies, with the degrees of freedom.
-
Chi-Square Test of Independence Calculator
Run a chi-square test of independence on a 2x2 table. Enter the four counts to get the chi-square statistic, degrees of freedom and expected counts.
-
Child Investment Account Calculator NZ 2026/27
Investing for a child outside KiwiSaver: compare the account in the child's name against a parent's, using the child's lower PIR. Free NZ calculator.
-
NZ Child Support Calculator 2026
Free NZ child support calculator. Estimate your IRD formula assessment based on both parents' incomes, care arrangements, and child's age.
-
Childcare Cost Calculator NZ
Work out the real cost of early childhood care in New Zealand after free hours and subsidies.
-
Childcare Costs and Subsidies NZ
NZ childcare guide: 20 Hours ECE, childcare subsidy, OSCAR, nanny tax obligations, Working for Families interaction, regional costs, in-home care options and subsidies.
-
NZ Childcare Subsidies 2026
New Zealand childcare support: 20 Hours ECE, the Childcare Subsidy, and OSCAR subsidy for before and after school care. Who qualifies, the hours and the income tests.
-
Childcare vs Stay Home Calculator NZ
Work out whether a second income covers childcare, or whether staying home stacks up, in New Zealand.
-
chmod Calculator NZ
Convert a Unix file permission between octal (like 755) and symbolic (like rwxr-xr-x), and see what each owner, group and other permission means.
-
Choosing a Bank Account
Transaction, savings, bonus saver and term deposit accounts: the fees and features to compare, and matching accounts to your needs. NZ.
-
Choosing a KiwiSaver Fund
How to choose a KiwiSaver fund in New Zealand: defensive, conservative, balanced, growth and aggressive funds explained, matching a fund to your time horizon.
-
Choosing where to live
Eleven steps through choosing where to live in New Zealand: real rents by area, regional earnings and spending, the commute priced properly, and whether the area is...
-
Chord Finder
Pick a root note and chord type to see the notes in the chord, the interval pattern and semitone spacing, with correct sharp and flat spelling for every key.
-
Chord Progression Generator
Choose a key and a classic pattern like I-V-vi-IV, ii-V-I or 12-bar blues and get every chord named and ready to play, plus the full diatonic chord set.
-
Housing in Christchurch Central-East
What housing costs in Christchurch Central-East, Christchurch City: median weekly rent $426, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Christchurch Central-North
What housing costs in Christchurch Central-North, Christchurch City: median weekly rent $420, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Christchurch Central-South
What housing costs in Christchurch Central-South, Christchurch City: median weekly rent $450, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Christchurch Central-West
What housing costs in Christchurch Central-West, Christchurch City: median weekly rent $466, the ownership and renting split, and household income, from the 2023 Census.
-
Christmas Savings Calculator NZ
Set a budget for gifts, food and travel and see the painless weekly amount to put away from now, so Christmas arrives without debt.
-
Churned MRR Calculator
Calculate churned MRR from cancelled customers and your gross MRR churn rate against starting MRR. Track lost recurring revenue in your subscription business.
-
Housing in Churton Park North
What housing costs in Churton Park North, Wellington City: median weekly rent $795, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Churton Park South
What housing costs in Churton Park South, Wellington City: median weekly rent $600, the ownership and renting split, and household income, from the 2023 Census.
-
CIDR Calculator
Enter an IP address and prefix length for the network and broadcast addresses, subnet and wildcard masks, usable host range and host count.
-
Cigarettes and Tobacco: what NZ households spend per week
What New Zealand households spend on cigarettes and tobacco each week, from the Stats NZ Household Economic Survey 2023, with every survey year since 2007 and what the...
-
Circle Calculator
Free circle calculator. Enter the radius, diameter, circumference, or area, and get all the others worked out instantly.
-
Circle Formula Calculator
Circle formula calculator. Enter radius, diameter, circumference, or area and instantly get all other circle measurements. Formulas shown for every result.
-
Circle Length Calculator
Calculate the circumference (length) of a circle from its radius or diameter. Instant results using C = 2πr. Includes arc length for any central angle.
-
Circle Measurements Calculator
Calculate all circle measurements instantly. Enter any one value (radius, diameter, circumference, or area) and get all other circle properties.
-
Circle Perimeter Calculator
Calculate the perimeter (circumference) of a circle from its radius or diameter. Instant results using C = 2πr. Shows area too. Free online circle calculator.
-
Circle Segment Calculator
Calculate the area, arc length, chord length, and sagitta of a circle segment. Enter radius and central angle in degrees to get all four segment measurements instantly.
-
Circle Skirt Calculator
Enter your waist measurement and skirt length to get the radii, cutting diameter and fabric needed for a full, half or quarter circle skirt.
-
Circumference and Area of a Circle Calculator
Calculate the circumference and area of a circle from radius, diameter, or circumference. Instant results using the standard formulas C = 2πr and A = πr².
-
Circumference Calculator
Calculate the circumference of a circle from radius or diameter. Instantly find C = 2πr or C = πd, plus circle area, diameter, and radius.
-
Circumference of a Cylinder Calculator
Calculate the circumference of a cylinder from its radius or diameter. Instant results for base circumference, lateral surface arc length, and total surface area.
-
Circumference to Diameter Calculator
Convert circumference to diameter instantly. Enter any circumference and get the diameter, radius, and area of the circle. Formula: d = C / π.
-
Circumscribed Circle Calculator
Calculate the circumscribed circle (circumcircle) of a triangle. Enter three side lengths to find the circumradius, circumference, and area of the circumcircle.
-
NZ Citizenship Calculator
Check whether you meet the presence requirements for New Zealand citizenship by grant: at least 1,350 days in NZ across the last 5 years.
-
Cladding Profile Selection Calculator NZ
Calculate the linear metres of cladding required for your NZ build. Covers horizontal and vertical shiplap, bevelback, rusticated, and tongue and groove profiles.
-
Claiming Vehicle Expenses Guide
The logbook method against the kilometre rate for business vehicle claims, business-use percentage, and which suits your situation. NZ.
-
Housing in Clarks Beach
What housing costs in Clarks Beach, Auckland: median weekly rent $550, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Clarkville
What housing costs in Clarkville, Waimakariri District: median weekly rent $350, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Claudelands
What housing costs in Claudelands, Hamilton City: median weekly rent $350, the ownership and renting split, and household income, from the 2023 Census.
-
Clausius-Clapeyron Calculator
Free Clausius-Clapeyron calculator. Enter a known vapour pressure and temperature, the enthalpy of vaporisation and a second temperature to predict the vapour pressure.
-
NZ Clean Car Standard and Fees 2026
The Clean Car Discount ended on 31 December 2023; the Clean Car Standard CO2 rules for importers continue. The 2026 state of both.
-
Housing in Clearwater
What housing costs in Clearwater, Christchurch City: median weekly rent $326, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Clendon Park East
What housing costs in Clendon Park East, Auckland: median weekly rent $350, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Clendon Park North
What housing costs in Clendon Park North, Auckland: median weekly rent $498, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Clendon Park West
What housing costs in Clendon Park West, Auckland: median weekly rent $500, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Clevedon
What housing costs in Clevedon, Auckland: median weekly rent $500, the ownership and renting split, and household income, from the 2023 Census.
-
Client Portfolio Projection Calculator NZ 2026/27
Free NZ portfolio projection showing a range of outcomes rather than one number, in nominal and real terms, including why the average outcome overstates the typical one.
-
Housing in Clifton Hill
What housing costs in Clifton Hill, Christchurch City: median weekly rent $550, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Clifton-Kew
What housing costs in Clifton-Kew, Invercargill City: median weekly rent $350, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Clinton
What housing costs in Clinton, Clutha District: median weekly rent $172, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Clive
What housing costs in Clive, Hastings District: median weekly rent $420, the ownership and renting split, and household income, from the 2023 Census.
-
Clock Angle Calculator
Calculate the angle between the hour and minute hands of an analogue clock at any time. Instant results in degrees for both the smaller and larger angles.
-
Clock Duration Calculator
Calculate the duration between two clock times. Enter a start and end time (with AM/PM or 24-hour format) and get the elapsed hours and minutes instantly.
-
Close Company Vehicle FBT vs Income Tax Calculator NZ
Free NZ calculator: should your close company pay FBT on a shareholder vehicle, or opt out and apportion expenses? Compares both methods including kilometre rates. 2026.
-
Clothes Dryer Cost Calculator NZ
Work out what your clothes dryer costs to run in New Zealand, per load and per year, from its power rating, loads per week and your electricity price.
-
Clothing and footwear: what NZ households spend per week
What New Zealand households really spend on clothing and footwear each week, from the Stats NZ Household Economic Survey 2023, broken down by region, household size...
-
Clothing Resales: what NZ households spend per week
What New Zealand households spend on clothing resales each week, from the Stats NZ Household Economic Survey 2023, with every survey year since 2007 and what the...
-
Clothing: what NZ households spend per week
What New Zealand households spend on clothing each week, from the Stats NZ Household Economic Survey 2023, with every survey year since 2007 and what the category covers.
-
Housing in Clouston Park
What housing costs in Clouston Park, Upper Hutt City: median weekly rent $480, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Clover Park East
What housing costs in Clover Park East, Auckland: median weekly rent $500, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Clover Park North
What housing costs in Clover Park North, Auckland: median weekly rent $420, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Clover Park South
What housing costs in Clover Park South, Auckland: median weekly rent $530, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Cloverlea (Auckland)
What housing costs in Cloverlea (Auckland), Auckland: median weekly rent $550, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Cloverlea (Palmerston North City)
What housing costs in Cloverlea (Palmerston North City), Palmerston North City: median weekly rent $450, the ownership and renting split, and household income, from the...
-
Housing in Clutha Valley
What housing costs in Clutha Valley, Clutha District: median weekly rent $200, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Clyde
What housing costs in Clyde, Central Otago District: median weekly rent $400, the ownership and renting split, and household income, from the 2023 Census.
-
cm to Feet and Inches Converter
Convert centimetres to feet and inches, and feet and inches back to centimetres. Free cm to feet and inches converter for height, with the exact factor.
-
Cm to Inches Converter
Free cm to inches converter. Convert between centimetres and inches instantly, both ways, with a conversion chart and the exact factor.
-
CM to KM Conversion Calculator
Convert centimetres to kilometres instantly. Enter any value in cm to get the exact result in km. Formula: km = cm divided by 100,000. Free, accurate, no sign-up.
-
cm to mm Converter
Convert centimetres to millimetres instantly. 1 cm = 10 mm. Free cm to mm converter with worked examples, a full reference table, and reverse mm to cm conversion.
-
cm to mm Ring Size Converter
Convert finger circumference from centimetres to millimetres and find your ring size in US, UK/NZ/AU, EU/ISO, and Japanese standards. Free, instant ring size chart.
-
cm to Ring Size Converter
Convert finger circumference in centimetres to ring size. Get NZ/AU/UK letter sizes, US number sizes, and EU/ISO sizes instantly.
-
Co-Ownership Equity Share Calculator NZ
Buying a house with unequal deposits: the ownership shares to record on the title, and what each person walks away with, under both splitting methods.
-
Coast FIRE Calculator NZ
Work out your Coast FIRE number, the amount that, once invested, could grow on its own to fund retirement without further contributions.
-
Housing in Coastlands
What housing costs in Coastlands, Whakatane District: median weekly rent $400, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Coatesville
What housing costs in Coatesville, Auckland: median weekly rent $586, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Cobden
What housing costs in Cobden, Grey District: median weekly rent $260, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Cockle Bay
What housing costs in Cockle Bay, Auckland: median weekly rent $550, the ownership and renting split, and household income, from the 2023 Census.
-
Coefficient of Variation Calculator
Work out the coefficient of variation from mean and SD or raw data, with the CV percentage and a variability label for quick interpretation.
-
Cofactor Calculator (3x3)
Free cofactor calculator. Enter a 3 by 3 matrix and a position to get the minor and the cofactor of that entry.
-
Cofactor Expansion Calculator
Free cofactor expansion calculator. Compute the determinant of a 2x2 or 3x3 matrix using Laplace expansion along any row or column, with full step-by-step working.
-
Cofactor Matrix Calculator
Free cofactor matrix calculator. Find the cofactor matrix for any 2x2 or 3x3 matrix instantly with step-by-step working. Shows each minor determinant and sign pattern.
-
Coffee Habit Cost Calculator NZ
See the annual cost of bought coffee versus making it at home in New Zealand, and what the difference could grow to if invested.
-
Coffee Ratio Calculator
Calculate the exact coffee-to-water ratio for any brew method. Enter your coffee grams or water volume and get the matched amount instantly.
-
Coffee to Water Ratio Calculator
Coffee to water ratio calculator. Enter your coffee dose in grams and choose a ratio (1:15 to 1:18) to get the exact water amount needed.
-
Cofunction Calculator
Find the cofunction identities for any angle: sin and cos, tan and cot, sec and csc of complementary angles.
-
Cohen's d Effect Size Calculator
Calculate Cohen's d, the standardised effect size between two groups, from your data. See the pooled standard deviation and whether the effect is small, medium or large.
-
Coin Flip Probability Calculator
Calculate the exact probability of getting a certain number of heads or tails in any number of coin flips.
-
Coin Flipper
Free online coin flipper. Flip a coin instantly with realistic animation. Track heads and tails results, streaks, and percentages. Flip multiple coins at once.
-
Cold Brew Ratio Calculator
Enter your coffee amount and choose a ratio from 1:4 concentrate to 1:8 ready-to-drink for exact water quantities by weight and volume.
-
Collatz Conjecture Calculator
Free Collatz conjecture calculator. Enter a number to count the steps in the 3n+1 sequence to reach 1, and the highest value the sequence reaches.
-
Housing in College Estate
What housing costs in College Estate, Whanganui District: median weekly rent $360, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in College Hill
What housing costs in College Hill, Auckland: median weekly rent $700, the ownership and renting split, and household income, from the 2023 Census.
-
Color Contrast Checker
Check the contrast ratio between a text colour and background against WCAG accessibility standards. Enter two colours to see the ratio and AA and AAA pass results.
-
Color Converter: HEX, RGB, HSL
Free online colour converter. Instantly convert between HEX, RGB, and HSL colour codes. Paste any value and get all three formats plus a live colour preview.
-
Color Palette Generator
Generate a colour palette of tints and shades from any base colour. Pick a colour to get lighter and darker variations with their hex codes for your design.
-
Color Picker and Converter
Convert colour codes between HEX, RGB and HSL. Enter a hex code like #FF5733 and see RGB values, HSL values, a colour swatch and the complementary colour.
-
Colour Blindness Test
Free online colour blindness test. Eight Ishihara-style dot plates test for red-green and blue-yellow colour vision deficiency.
-
Colour Picker
Pick a colour and convert between HEX, RGB and HSL with a live preview. Free colour picker and converter for web design, with the formulas explained.
-
Housing in Colville
What housing costs in Colville, Thames-Coromandel District: median weekly rent $250, the ownership and renting split, and household income, from the 2023 Census.
-
Combination (nCr) Calculator
Free combination calculator. Compute nCr (n choose r) instantly using the combination formula C(n,r) = n! / (r! x (n-r)!). See step-by-step working and use cases.
-
Combination Calculator (nCr)
Calculate nCr, the ways to choose r items from n when order does not matter, with the formula expansion and a comparison against nPr.
-
Combination Without Repetition Calculator
Combinations without repetition by C(n,r) = n! / (r! x (n-r)!): how many ways to choose r from n when order does not matter.
-
Combinations with Repetition Calculator NZ
Calculate combinations with repetition (multiset coefficient) for choosing r items from n types when repeats are allowed and order does not matter. Enter n and r.
-
Combined Gas Law Calculator
Solve the Combined Gas Law for pressure, volume, or temperature. Enter five of six variables P1, V1, T1, P2, V2, T2 to find the sixth and see all state values.
-
Combustion Reaction Calculator
Balance the combustion reaction for any hydrocarbon: moles of oxygen needed, CO2 and H2O produced, and the heat released.
-
Coming Home to NZ
Moving back to NZ: the four year transitional resident exemption, why you must choose between it and Working for Families, and when FIF starts to bite.
-
Commercial Leases NZ
The advertised rent is not the occupancy cost. How operating expenses, ratchet clauses and personal guarantees work in New Zealand commercial leases.
-
NZ Commercial Property Purchase Calculator 2026
Free NZ commercial real estate purchase calculator. Model yield, cap rate, DSCR, cash-on-cash return, GST zero-rating, deposit, loan structure, and full purchase costs.
-
Commercial Property Syndicates NZ
A syndicate pays a good cash yield and offers no way out. How gearing, lease expiry and secondary market discounts actually decide the return.
-
Commission Calculator
Free commission calculator. Enter a sale amount and commission rate to see the commission earned, plus total pay if you add a base salary. Worked examples included.
-
Commission-Only Income Calculator NZ
Budget a commission income: from average sales and rate, see your annual income, the tax to set aside, and a steady monthly draw. NZ.
-
Committed MRR (CMRR) Calculator
Work out your committed monthly recurring revenue (CMRR) from current MRR, signed expansions and known churn. See forward CMRR and annualised CMRR instantly.
-
Common Factor Calculator
Enter two or more whole numbers to find all common factors, the GCF and the LCM, with clear step-by-step working shown.
-
Communication: what NZ households spend per week
What New Zealand households really spend on communication each week, from the Stats NZ Household Economic Survey 2023, broken down by region, household size, tenure and...
-
Community Services Card - Learning Centre
The Community Services Card in New Zealand: who qualifies, the 2026 income limits, and what it saves on GP visits, prescriptions, dental, transport and more.
-
Commute Calculators
Free NZ commute calculators: what your drive to work costs a year, driving vs bus vs cycling, whether a job offer covers a longer trip, and whether moving closer pays.
-
Commute Cost Calculator NZ 2026
Work out what your commute really costs a year: running costs at the IRD kilometre rate, parking, tolls and public transport, plus the hours it takes.
-
Company Solvency Test Calculator NZ
Applies both limbs of the section 4 solvency test directors must satisfy before a distribution or buy-back, with headroom in dollars. Free NZ tool.
-
Company Tax and Imputation Calculator NZ
Work out New Zealand company tax at 28% on your profit, the after-tax profit available to distribute, and the imputation credits attached to fully imputed dividends.
-
Company vs Personal Tax Crossover Calculator NZ 2026/27
Free NZ calculator that finds the exact profit level where incorporating a company beats staying a sole trader.
-
Comparing Fractions Calculator
Compare two fractions instantly. Find out which fraction is greater, lesser, or equal using cross-multiplication. Shows step-by-step working and decimal equivalents.
-
Comparing Job Offers
How to compare two or more NZ job offers like for like: base salary, total remuneration, employer KiwiSaver, benefits and after-tax take-home pay.
-
Comparison Methodology
The criteria and sources behind our NZ calculator platform comparison, so it reads as evidence rather than marketing.
-
Complete Mortgage Mastery Guide
Master guide integrating all mortgage concepts: repayments, break fees, refinancing, term comparison, interest rates, budgeting, and property valuation in NZ.
-
Completing the Square Calculator
Convert a quadratic ax squared plus bx plus c to completed-square vertex form. Returns the vertex, discriminant, roots and each step of the completing the square process.
-
Complex Argument Calculator
Free complex argument calculator. Enter the real and imaginary parts to get the argument (angle) of a complex number in degrees and radians, with the modulus.
-
Complex Modulus Calculator
Free complex modulus calculator. Enter the real and imaginary parts to get the modulus (magnitude) of a complex number, with its argument.
-
Complex Number Calculator NZ
Add and multiply two complex numbers and find the modulus and argument. Enter the real and imaginary parts of each to see the results in seconds.
-
Complex Number to Polar Form Calculator
Convert a complex number from rectangular form (a + bi) to polar form (r∠θ). Calculates the modulus and argument instantly. Displays result in degrees and radians.
-
Complex Number to Rectangular Form Calculator
Convert a complex number from polar form (r, θ) to rectangular form a + bi. Enter the modulus and argument in degrees or radians. Instant results with full workings.
-
Complex Root Calculator
The nth roots of any complex number by De Moivre's theorem: enter a + bi and the degree n for all n roots in rectangular and polar form.
-
Composite Function Calculator (Linear)
Free composite function calculator. Enter linear functions f(x) = ax + b and g(x) = cx + d to get f(g(x)) and evaluate it at a point.
-
Compound Annual Growth Rate (CAGR) Calculator
Work out the compound annual growth rate of any investment, revenue or metric from start value, end value and years, with a full explanation.
-
Compound Decisions - Small Choices Over Time
NZ guide to compound decisions: small repeated choices that accumulate exponentially, positive and negative compounding, daily habits, 15-year comparison scenario.
-
Compound Growth with Withdrawals Calculator NZ
Project an investment that grows while being drawn down: the ending balance, total withdrawn, and whether and when the money runs out.
-
Compound Interest Calculator NZ 2026
Calculate compound interest on investments, savings, or debts. Enter your principal, interest rate, compounding frequency, and term to see total growth and ROI over time.
-
Compound Interest Calculator NZ 2026
Compare compound interest growth in PIE funds versus non-PIE investments using your actual PIR and marginal tax rates.
-
Compounding Frequency Calculator NZ
See how daily, monthly, quarterly and annual compounding change the result on the same rate in New Zealand.
-
Comprehensive Personal Budget Calculator
Track every income source, living expense, debt repayment and savings goal to see your true monthly surplus or deficit. Built for New Zealand.
-
Compressibility Factor (Z) Calculator
The compressibility factor Z = PV/nRT: enter pressure, volume, moles and temperature to see how far a gas deviates from ideal behaviour.
-
Compression Ratio Calculator
Calculate an engine's compression ratio from the swept (displacement) volume and the clearance volume of a cylinder. Free compression ratio calculator with the formula.
-
Compression Ratio to PSI Calculator
Convert engine compression ratio to estimated cylinder pressure in PSI using the polytropic formula (PSI = 14.7 x CR^1.3). Includes kPa and bar outputs.
-
Computers and TVs: what NZ households spend per week
What New Zealand households spend on computers and tvs each week, from the Stats NZ Household Economic Survey 2023, with every survey year since 2007 and what the...
-
Conception Date Calculator NZ 2026
Estimate your likely conception date from your due date or last period. See the conception window, the estimated date, and how the dates relate across a pregnancy.
-
Housing in Concord
What housing costs in Concord, Dunedin City: median weekly rent $202, the ownership and renting split, and household income, from the 2023 Census.
-
Concrete Bags Calculator NZ 2026
Work out how many 20kg bags of premix concrete you need for a slab, path or footing in New Zealand.
-
Concrete Bags Needed Calculator
How many concrete bags for a slab, footing, post hole or step: enter dimensions and bag size (20, 25 or 40 kg) for count, cost and volume.
-
Concrete Block Calculator
Calculate how many concrete blocks you need for a wall or project. Enter dimensions and block size to get block count, mortar volume, and estimated cost.
-
Concrete Block Fill Calculator
The concrete or grout to fill hollow block cores: enter wall size and block type for fill volume in cubic metres and bags needed.
-
Concrete Calculator NZ
Enter length, width and thickness for the volume in cubic metres and the 20kg or 25kg premix bags needed, with a wastage allowance. Free NZ tool.
-
Concrete Column Calculator
Calculate concrete volume, bags needed, and weight for round or square columns. Enter diameter (or width and depth) and height. Supports 20 kg, 25 kg, and 40 kg bags.
-
Concrete Cylinder Calculator
Concrete volume, weight and premix bags for a cylinder: enter diameter and height in mm or cm for cubic metres, kilograms and 20 kg bag count.
-
Concrete Mix Ratio Calculator NZ
Work out the cement, sand, aggregate and water needed for a concrete mix from the volume and ratio. Get cement bags and material volumes for your project.
-
Concrete Slab Calculator NZ
Work out how much concrete a slab needs in cubic metres, with a waste allowance, the weight in tonnes and how many premix bags it would take.
-
Concrete Stairs Calculator
Calculate the concrete volume, bags and estimated cost for a set of stairs. Enter the number of steps, rise, tread depth and width.
-
Concrete Volume Calculator
Work out how much concrete you need for a slab or pad. Enter length, width and depth to get the volume in cubic metres and the number of bags required.
-
Concrete Weight Calculator
Calculate the weight of concrete from volume or dimensions. Supports standard ready-mix (2,400 kg/m3), lightweight, and heavyweight concrete.
-
Conditional Offers Explained
What a conditional offer is when buying property in New Zealand, the common conditions, how condition dates work, and how to use conditions to protect yourself.
-
Conditional Probability Calculator
Conditional probability by Bayes' theorem: enter the prior, likelihood and false positive rate to find the posterior instantly.
-
Conductivity to Resistivity Calculator
Convert electrical conductivity (S/m or S/cm) to resistivity (Ω·m or Ω·cm) instantly. Includes common material presets for copper, aluminium, silicon, and more.
-
Cone Surface Area Calculator
Calculate cone slant height, lateral surface area, and total surface area from radius and height. Returns all three values instantly with formula and worked example.
-
Cone Volume Calculator
Free cone volume calculator. Enter the radius and height to get the volume, slant height, and surface area of a cone.
-
Confidence Interval Calculator
Calculate the confidence interval for a mean given sample size, standard deviation and confidence level.
-
Confidence Interval for a Mean Calculator
Work out a confidence interval for a sample mean from the mean, standard deviation, sample size and confidence level. See the lower and upper bounds instantly.
-
Confidence Interval for a Proportion Calculator NZ
Calculate a confidence interval for a proportion from the number of successes and sample size. Choose 90, 95 or 99 percent and see the margin of error and bounds.
-
Confidence Level Critical Value Calculator
Free confidence level calculator. Enter a confidence level to get the two-tailed and one-tailed critical z values and the significance level alpha.
-
Confusion Matrix Calculator
Enter TP, FP, FN and TN to compute accuracy, precision, recall, specificity, F1 score and Matthews correlation coefficient.
-
Congestion Charge vs Public Transport Calculator NZ
Free NZ calculator comparing the annual cost of driving (fuel, parking and a congestion charge) against taking public transport.
-
Housing in Conifer Grove East
What housing costs in Conifer Grove East, Auckland: median weekly rent $400, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Conifer Grove West
What housing costs in Conifer Grove West, Auckland: median weekly rent $680, the ownership and renting split, and household income, from the 2023 Census.
-
Conservation of Momentum Calculator
Free conservation of momentum calculator. Solve elastic and perfectly inelastic collisions: find final velocities given masses and initial velocities.
-
Construction Loans and Progress Payments
How a construction loan works in New Zealand: progress (drawdown) payments by build stage, paying interest only on what is drawn, and fixed-price vs cost-plus contracts.
-
Consumer Guarantees Act NZ
Complete NZ guide to the Consumer Guarantees Act 1993 and Fair Trading Act 1986. Know your rights to repair, replace or refund. Understand extended warranties, dispute...
-
Contact Lens Vertex Distance Calculator
Convert spectacle lens prescriptions to contact lens powers using the vertex distance formula.
-
Contact Us
Contact Calculate.co.nz. Report a bug or a figure that looks wrong, suggest a calculator, or get in touch about media and partnerships. We reply to every message.
-
Content Creator Tax NZ
How content creator and influencer income is taxed in NZ: sponsorships, gifted products, hobby versus business, GST at $60,000 and ACC levies.
-
Contents Insurance and Underinsurance
How contents insurance works in New Zealand: what it covers, how to value your contents room by room, why people underinsure, and what renters should know.
-
Contents Insurance Calculator NZ 2026
Free NZ contents insurance calculator. Estimate replacement value of your household contents based on dwelling type, bedrooms, quality, and specified items. Avoid...
-
Contents Insurance Value Calculator NZ
Build a room-by-room estimate of your contents value: furniture, appliances, electronics and valuables, so your sum insured is right. NZ.
-
Continued Fraction Calculator NZ
Convert a decimal into a continued fraction and find the best rational approximation. Enter a value to see the continued fraction terms and the nearest simple fraction.
-
Contract Milking Rate Calculator NZ
Work out contract milking income from a rate per kgMS, take off the costs the contract milker carries, and find the rate the business actually needs to break even.
-
Contract Rate to Salary Calculator NZ 2026/27
Convert a NZ contracting rate into an equivalent salary, allowing for leave, public holidays, sick days, employer KiwiSaver and non-billable time.
-
Contract Risk
Break fees, escalation clauses, automatic renewals, default interest and personal guarantees: the contract terms that cost NZ households.
-
Contraction MRR Calculator
Work out contraction MRR lost to downgrades and seat reductions, plus your contraction rate against base MRR. Track shrinking accounts in your subscription business.
-
Contraction Revenue Calculator
Calculate your contraction revenue from customer downgrades and reduced usage, and the contraction rate against your starting MRR.
-
Contractor Day Rate Calculator NZ
Convert a contracting day rate to an equivalent permanent salary in New Zealand, and back again.
-
Contractor GST Threshold Calculator NZ
See whether your turnover means you must register for GST in New Zealand and the effect of registering.
-
Contractor Tax Basics Guide
Contractor tax in plain language: income tax with no PAYE, GST registration, provisional tax, expenses, ACC and setting money aside. NZ.
-
Contractor True Cost Calculator NZ 2026/27
The true annual cost of leaving employment: paid leave, public holidays, employer KiwiSaver and ACC, in dollars and as a share of income. NZ.
-
NZ Contractor vs Employee Calculator
Contractor or employee in New Zealand? Compare net take-home after PAYE, ACC, GST and business expenses to find the true difference.
-
Contractor vs Employee Test NZ 2026
Check the 2026 contractor gateway test limb by limb. All five criteria must be met, and if any one fails the common law test applies instead.
-
Contrast Ratio Calculator
Calculate the contrast ratio between two colours using the WCAG relative luminance formula. Check if your colour pairs meet AA or AAA accessibility standards.
-
Contribution Margin Calculator
Work out contribution margin per unit, the contribution margin ratio and total contribution from your selling price, variable cost and units sold.
-
Contributory Conduct Remedy Calculator NZ 2026
How the 2026 contributory conduct rules cut personal grievance remedies: serious misconduct removes everything, contribution removes hurt and humiliation entirely.
-
Conversion Funnel Calculator
Free conversion funnel calculator. Enter visitors at each funnel stage to instantly see conversion rates, drop-off counts, and your overall funnel CVR.
-
Conveyancing Fee Estimator NZ
Estimate the conveyancing cost of buying or selling a property in New Zealand: legal fee, LINZ registration, LIM, AML verification and disbursements, totalled for you.
-
Cooking Measurement Converter
Convert cooking measurements between cups, tablespoons, teaspoons, millilitres, litres and fluid ounces. US cup definitions used throughout.
-
Housing in Cooks Beach-Ferry Landing
What housing costs in Cooks Beach-Ferry Landing, Thames-Coromandel District: median weekly rent $400, the ownership and renting split, and household income, from the...
-
Coordinates Converter
Free coordinates converter. Convert latitude and longitude between decimal degrees and degrees, minutes, seconds (DMS), both ways, instantly.
-
Housing in Cornmarket
What housing costs in Cornmarket, Whanganui District: median weekly rent $300, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Cornwall Park
What housing costs in Cornwall Park, Hastings District: median weekly rent $380, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Coromandel
What housing costs in Coromandel, Thames-Coromandel District: median weekly rent $300, the ownership and renting split, and household income, from the 2023 Census.
-
Correlation Coefficient Calculator (Pearson r)
Calculate Pearson r correlation coefficient for two data sets. Returns r value, r squared, strength label, direction, and a scatter summary for your paired data.
-
Housing in Corstorphine
What housing costs in Corstorphine, Dunedin City: median weekly rent $204, the ownership and renting split, and household income, from the 2023 Census.
-
Cosecant Calculator
Free cosecant calculator. Enter an angle in degrees or radians to get the cosecant. Includes the formula, the angle in both units, and a worked example.
-
Cosine Calculator
Free cosine calculator. Enter an angle in degrees or radians to get the cosine. Includes the formula, the angle in both units, and a worked example.
-
Cosine Triangle Calculator (Law of Cosines)
Free cosine triangle calculator using the Law of Cosines. Solve for a missing side or angle in any triangle. Enter two sides and the included angle, or all three sides.
-
Cost Cutting Impact Calculator NZ 2026/27
Rank proposed cuts by cash actually saved in twelve months, after implementation costs and lead times, with the revenue each puts at risk. NZ.
-
Cost of a Baby Calculator NZ
The real cost of a first year: upfront setup, ongoing monthly costs and the income drop during parental leave, added up for New Zealand.
-
Cost Of A Bad Hire Calculator NZ 2026/27
Total the salary, recruitment, training, management time, lost revenue and exit costs of a hire that did not work out. Free NZ calculator.
-
Cost of a Deck or Fence All-In Calculator NZ 2026
Estimate the all-in cost of a deck or fence in New Zealand. Includes materials, labour, consent, GST. Covers timber, composite, steel, Colorsteel and more. NZ 2026 rates.
-
Cost of a Sleepout or Cabin (All-In) Calculator NZ 2026
The all-in cost of a backyard sleepout or cabin: construction, consent, site prep, power, water and GST, at updated 2026 NZ rates.
-
Cost of an Overdraft Habit Calculator NZ
Work out the yearly cost of regularly being overdrawn in New Zealand, adding up overdraft interest and account fees across the months you dip into the red.
-
Cost of BNPL Defaults Calculator NZ
The real cost of missing Buy Now Pay Later payments: Afterpay, Laybuy and Zip late fees, the fee cap, and the effective surcharge on your purchase.
-
The Cost of Having a Baby in NZ
The real first-year costs of having a baby in New Zealand: one-off and ongoing costs, the income drop while on leave, and the entitlements that help.
-
Cost of Living by Region in NZ
What households actually spend each week in Auckland, Wellington, Canterbury and the rest of New Zealand, from Stats NZ, set against what people earn in each region.
-
NZ Cost of Living Comparison Calculator
Compare housing, transport, food and total spending across Auckland, Wellington, Christchurch and Hamilton to decide where to live.
-
Cost of Minimum Card Payments Calculator NZ
See the lifetime cost of paying only the minimum on a credit card in New Zealand. Find how many years it takes to clear the balance and the total interest you pay.
-
Cost of Owning a Pool Calculator NZ 2026
Calculate the true cost of owning a swimming pool in New Zealand. Installation, chemicals, electricity, heating, maintenance, insurance, and lifetime total.
-
Cost of Raising a Child Calculator NZ 2026
Estimate the total cost of raising a child to age 18 in New Zealand from your weekly spend, plus one-off costs, with yearly, monthly and weekly breakdowns.
-
The Cost of Raising a Child in New Zealand
The cost of raising a child in NZ: the main categories, how costs change from baby to teenager, childcare, and the support available.
-
Cost of Raising a Child to 18 Calculator NZ 2026
Calculate the total cost of raising a child to age 18 in New Zealand. Covers childcare, education, food, clothing, healthcare, activities and more.
-
Cost of Selling a House Calculator NZ
Work out the all-in cost of selling a house in New Zealand: agent commission, marketing, legal fees, staging and repairs, and see your net proceeds after costs.
-
The Cost of Selling a House in NZ
Every cost between deciding to sell and the money reaching your account in New Zealand, including the ones that are easy to miss.
-
Cost of Sick Days Calculator NZ 2026
Work out the income you lose from unpaid sick days in New Zealand once your paid sick leave runs out, based on your salary, work days and sick days taken.
-
Cost of Waiting to Buy Calculator NZ
Weigh saving a bigger deposit against likely house price and interest rate movement in New Zealand.
-
Cost Per Hire Calculator NZ 2026/27
Cost per hire by the SHRM and ANSI method: external spend plus the internal hours managers actually put in, with agency compared against direct. NZ.
-
Cost Per KM Calculator NZ 2026
Your real cost per kilometre: fuel, road user charges and fixed costs like insurance, rego and maintenance, in cents per km and per year. NZ.
-
Cost Per Mile Calculator
Free cost per mile calculator. Enter your total trip cost and distance in miles to find out exactly how much you are spending per mile.
-
Cost Per Use Calculator NZ
Judge whether a purchase is good value by working out what it really costs each time you use it.
-
Cotangent Calculator
Free cotangent calculator. Enter an angle in degrees or radians to get the cotangent. Includes the formula, the angle in both units, and a worked example.
-
Coterminal Angle Calculator
Positive and negative coterminal angles for any angle in degrees, with the principal angle and the radian equivalent.
-
Coulomb's Law Calculator
The electrostatic force between two point charges by Coulomb's Law, with direction and electric field strength, in newtons.
-
Coulomb's Potential Energy Calculator
Calculate the electric potential energy between two point charges using Coulomb's law, from the charges and their separation.
-
NZ Council Rates by Region 2026
Average residential council rates in 2026 run from about $3,200 in Christchurch to $4,500 in Auckland. Every main centre, and how a rates bill is worked out.
-
Countdown Timer
Free online countdown timer with alarm. Set hours, minutes, and seconds, then start the countdown. Audio alert when time is up.
-
Countdown to Date Calculator NZ
Count down to any date in New Zealand and see how many days, hours and minutes remain until a deadline, event, holiday or birthday.
-
Couple Income Split Tax Calculator NZ
For couples working in their own company: the shareholder salary split that uses both sets of tax brackets and minimises combined NZ income tax.
-
Course Fee vs Earnings Calculator NZ 2026
Decide if a qualification is worth it in New Zealand by weighing the course fee and income given up while studying against the extra lifetime earnings.
-
Course ROI Calculator NZ 2026
The return on a course or qualification: its cost against the salary uplift it brings, with the payback period and ROI percentage. NZ.
-
Housing in Courtenay
What housing costs in Courtenay, Wellington City: median weekly rent $588, the ownership and renting split, and household income, from the 2023 Census.
-
Covariance Calculator
Calculate sample and population covariance for two data sets. Enter paired x and y values to get sample covariance, population covariance, means, and number of pairs.
-
Cow Gestation Calculator NZ
Enter the breeding or AI date and breed to estimate your cow's calving due date, with an earliest to latest likely window either side.
-
NZ CPI and Inflation Rates
NZ inflation is 4.1% for the year to the June 2026 quarter. CPI history from 2010, the breakdown by group, the RBNZ target band and release dates. Source: Stats NZ.
-
Housing in Craigieburn
What housing costs in Craigieburn, Selwyn District: median weekly rent $160, the ownership and renting split, and household income, from the 2023 Census.
-
Cramer's Rule Calculator (2x2)
Free Cramer's rule calculator. Enter a 2 by 2 system of linear equations to solve for x and y using determinants.
-
Crawl Ratio Calculator
Enter transmission low gear, transfer case low range and axle ratios to find your 4WD's effective crawl ratio.
-
Housing in Crawshaw
What housing costs in Crawshaw, Hamilton City: median weekly rent $410, the ownership and renting split, and household income, from the 2023 Census.
-
CRC32 Checksum Calculator NZ
Calculate the CRC32 checksum of any text, shown in hexadecimal and decimal. Useful for verifying data integrity. Runs entirely in your browser using the IEEE CRC-32.
-
NZ Credit Card and Personal Loan Rates 2026
Typical New Zealand credit card interest rates and personal loan rates for 2026: standard and low-rate cards, cash advance rates, and unsecured personal loan ranges.
-
Credit Card Balance Transfers
What a credit card balance transfer is in New Zealand, how the low introductory rate works, the traps to avoid, and how to use one to actually clear debt faster.
-
Credit Card Interest Calculator NZ
Enter your balance, rate and monthly payment to see how long the card takes to clear and the total interest you will pay. Free NZ calculator.
-
Credit Card Interest-Free Period Optimiser NZ
Work out how many interest-free days a credit card purchase gets in New Zealand based on when in the statement cycle you buy, and find the best day to make big purchases.
-
Credit Card Minimum Payment Trap Calculator NZ
See how long it takes to clear a NZ credit card paying only the minimum, and the total interest it costs. Compare against a fixed monthly payment to see what you save.
-
Credit Card Minimum Payments
Why minimum payments feel safe but are not: how daily interest compounds, real repayment timelines, and the escape strategies. NZ.
-
Credit Card vs Debit Card Cost Calculator NZ
The yearly cost of a credit card against debit: annual fee, interest on carried balances and rewards, weighed against a low-cost debit card. NZ.
-
Credit Cards and Interest Traps Guide
How credit card interest compounds, revolving debt, minimum repayments, the psychological traps, and how to regain control. NZ.
-
Credit Score Impact Estimator NZ
Estimate how missed payments, credit applications, defaults and high card use might affect your New Zealand credit score.
-
Credit Unions and Building Societies
How member-owned deposit takers differ from banks, what the Depositor Compensation Scheme changed on 1 July 2025, and how to spread deposits to stay fully covered.
-
Critical Angle Calculator NZ
Calculate the critical angle for total internal reflection between two media from their refractive indices. Used for prisms, optical fibres and glass.
-
Critical Points Calculator
Find where f(x) has zero derivative: the critical x values and function values, each classified as local max, min or inflection.
-
Housing in Crofton Downs
What housing costs in Crofton Downs, Wellington City: median weekly rent $524, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Cromwell East
What housing costs in Cromwell East, Central Otago District: median weekly rent $495, the ownership and renting split, and household income, from the 2023 Census.
-
Housing in Cromwell West
What housing costs in Cromwell West, Central Otago District: median weekly rent $475, the ownership and renting split, and household income, from the 2023 Census.
-
Cron Expression Builder NZ
Build a cron expression from simple choices: how often, the time, and the day. Generates the five-field cron schedule with a plain-English description.
-
Cron Expression Explainer NZ
Translate a cron expression into plain English. Enter the five fields of a cron schedule to understand exactly when it runs, with a breakdown of each field.
-
Cron Next Run Calculator NZ
See the next run times for a cron schedule. Enter a five-field cron expression and how many upcoming runs to list, and the calculator works out the exact dates and times.
-
Crop Factor Calculator
Calculate the crop factor for any camera sensor size. Enter sensor dimensions to find crop factor, equivalent focal length, and effective aperture compared to full frame.
-
Crore to Lakh Converter
Convert crores to lakhs instantly. 1 crore = 100 lakh. With reverse conversion and worked examples in the South Asian numbering system.
-
Crore to Million Converter
Convert crores to millions and millions to crores instantly. 1 crore = 10 million. Free bidirectional converter with a clear worked example and reference table.
-
Cross Multiplication Calculator
Solve a proportion a/b = c/d for any unknown using cross multiplication. Returns the missing value, verification that values are proportional and the cross products.
-
Cross Product Calculator NZ
Calculate the cross product of two 3D vectors, plus its magnitude and the area of the parallelogram they form. Enter the components of each vector.
-
Cross-Lease and Unit Title Risk Cost Calculator NZ
Estimate the potential cost of fixing a cross-lease or unit-title defect in New Zealand, such as an out-of-date flats plan or unapproved works, before you buy.
-
Cross-Lease to Freehold Conversion Cost Calculator NZ
The cost of converting a cross-lease to freehold: survey, legal, council and LINZ costs, and your share when split with neighbours. NZ.
-
Cross-Lease, Freehold and Unit Title Explained
Freehold, cross-lease, unit title and leasehold: what each means for ownership, financing, ongoing costs and resale. NZ.
-
Cross-Sectional Area Calculator
Calculate the cross-sectional area of any shape: circle, rectangle, square, triangle, ellipse, hollow circle, and I-beam. Instant results with formulas shown.
-
Cross-Sell Rate Calculator
Calculate your cross-sell rate from customers buying an extra product and your total customers. See the percentage of your base buying more than one product.
-
Crosswind Calculator
Free crosswind calculator. Enter wind speed and the angle between wind and runway (or heading) to find the crosswind and headwind components.
-
Crowdfunding Fees Calculator NZ 2026
Work out the crowdfunding total you need to raise to net your goal after platform and payment fees, and how much you keep.
-
Crypto Cost Basis FIFO Calculator NZ
Work out the FIFO cost basis and taxable gain when you sell cryptocurrency in New Zealand. Enter your buy lots and a sale to see the matched cost, gain and tax owed.
-
Crypto Custody and Exchanges NZ
Inland Revenue treats crypto as property and most disposals are taxable, despite New Zealand having no capital gains tax. Exchanges are not banks.
-
Crypto Gain Tax Calculator NZ
Estimate the tax on your cryptocurrency gains in New Zealand, where crypto is generally taxed as property.
-
CSS Gradient Generator NZ
Generate CSS linear-gradient code from two colours and an angle, with a live preview. Pick your colours and direction and copy the ready-to-use CSS for your website.
-
CSS Unit Converter (px, em, rem, pt, %)
Free CSS unit converter. Convert between px, em, rem, pt and percent using your base font size. Enter a value, set the base, and see every CSS length unit at once.
-
CSS Unit Converter: px, em, rem
Convert CSS units instantly: px to em, px to rem, em to rem, and back. Set your base font size and parent context. Live results for web designers and developers.
-
CSV to JSON Converter NZ
Convert CSV data into a JSON array of objects online. Paste CSV with a header row to get clean, formatted JSON. Runs in your browser; nothing is uploaded.
-
Cube Calculator
Calculate cube volume, surface area, face diagonal, and space diagonal from side length. Instant results with formula explanation and worked example.
-
Cube Density Calculator
Calculate the density of a cube from its mass and side length, or find the mass or side length from density. Instant results with formula and worked example.
-
Cube Root Calculator
Find the cube root of any number, positive or negative. Returns the exact cube root, the verification cube, and the result in surd notation with step-by-step working.
-
Cube Surface Area and Volume Calculator
Calculate the surface area, volume, face diagonal, and space diagonal of a cube from its side length. Instant results with full working shown.
-
Cubic Equation Calculator
Free cubic equation calculator. Enter a, b, c, d to solve ax^3 + bx^2 + cx + d = 0, returning all three roots, real or complex.
-
Cubic Equation Solver
Solve any cubic equation ax³ + bx² + cx + d = 0. Finds all real and complex roots using Cardano's method. Enter your coefficients and get exact roots instantly.
-
Cubic Feet Calculator
Free cubic feet calculator. Enter length, width, and height in feet, inches, or metres to get cubic feet.
-
Cubic Feet to Cubic Metres Converter
Convert cubic feet to cubic metres instantly. Enter any ft³ value and get the exact m³ result. Includes a reverse m³ to ft³ converter and a handy reference table.
-
Cubic Feet to Pounds Calculator
Convert cubic feet to pounds for water, concrete, soil, gravel, wood and more, with the weight in pounds and kilograms instantly.
-
Cubic Inches to Gallons Converter
Convert cubic inches to gallons instantly. Supports US gallons (231 in³) and UK imperial gallons (277.419 in³), with reverse conversion and worked examples.
-
Cubic Metre Calculator
Free cubic metre (CBM) calculator. Enter length, width, and height in metres or centimetres to get the volume in cubic metres. Add a quantity for total shipping volume.
-
Cubic Metre to Tonne Converter
Convert cubic metres to tonnes for concrete, sand, gravel, soil, steel, asphalt, and more. Enter volume and select material to get mass in tonnes instantly.
-
Cubic Yards to Tons Calculator
Convert cubic yards to tons (short or metric) for gravel, sand, topsoil, concrete, asphalt, mulch and more.
-
Cuboid Surface Area Calculator
Calculate the total surface area of a cuboid (rectangular box) instantly. Enter length, width, and height. Formula: SA = 2(lw + lh + wh). Works in any unit.
-
Cuboid Volume Calculator
Calculate the volume of a cuboid (rectangular box) instantly. Enter length, width and height in any unit. Formula: V = l x w x h.
-
Cups to Gallons Converter
Convert cups to gallons instantly. 16 US cups = 1 US gallon. Supports US and UK cup and gallon measurements. Reverse gallons to cups conversion included.
-
Cups to Ounces (oz) Converter
Convert cups to fluid ounces (fl oz) and millilitres instantly. Supports US customary cups, UK imperial cups, and metric cups.
-
Cups to Pints Converter
Convert cups to pints and pints to cups instantly. Free NZ cups to pints converter covering US cups, imperial cups and metric cups, with pints, millilitres and litres.
-
Cups to Pounds Converter
Convert cups to pounds for common baking and cooking ingredients. NZ metric cups (250 mL) and US cups (240 mL). Flour, sugar, butter, rice, oats and more.
-
Cups to Quarts Converter
Convert cups to quarts instantly. Free US customary volume converter with a live calculator, conversion table, and clear worked examples for cooking and recipes.
-
Currency and inflation questions, answered
Exchange rates and the spread a bank takes, what inflation does to a sum over time, and comparing prices across years.
-
Currency Converter NZ
Convert New Zealand dollars to and from all major currencies including USD, AUD, GBP, EUR, JPY, and more. Live exchange rates updated daily.
-
Current Converter
Convert electrical current between amperes, milliamps, microamps, nanoamps and kiloamps. Enter one value and see every other unit at once, with the exact factors.
-
Current Divider Calculator
Free current divider calculator. Work out how total current splits between two parallel resistors using the current divider rule.
-
Current Ratio Calculator
Calculate your current ratio from current assets and current liabilities. Measure short term liquidity and your ability to meet bills as they fall due.
-
Cursive Font Generator
Type text and copy cursive and bold cursive Unicode script lettering that survives in Instagram bios, usernames and comments where formatting is stripped.
-
Curtain Fabric Calculator NZ
Work out how many metres of curtain fabric you need in New Zealand from your window width, fullness, drop and fabric width, including hem and heading allowance.
-
Customer Acquisition Efficiency Calculator
Work out how many customers you win per dollar of acquisition spend and your cost per customer. See customers per $1,000 and CAC from spend and new customers.
-
Customer Churn Calculator
Calculate your customer churn rate from the customers lost against your starting count. See your retention rate and the annualised churn for your SaaS business.
-
Customer Engagement Score Calculator
Build a weighted customer engagement score from logins, feature use and key actions. See a single 0 to 100 score so you can rank and compare accounts.
-
Customer Health Score Calculator
Build a weighted customer health score from usage, support, engagement and NPS. See a 0 to 100 score and a healthy, at risk or critical band, instantly.
-
Customer Lifetime Calculator
Estimate your average customer lifetime from your monthly churn rate. See the expected lifespan in months and years to support retention and value planning.
-
Customer Lifetime Value (CLV) Calculator NZ 2026
Work out your customer lifetime value (CLV) and the most you can afford to spend acquiring a customer. Enter average sale, purchase frequency, retention and margin.
-
Customer Retention Rate Calculator
Work out your customer retention rate from starting customers, ending customers and new customers acquired. See your CRR percent instantly for any NZ business.
-
Cutoff Frequency Calculator
The -3dB cutoff for RC, RL and series RLC filters from your resistance, capacitance and inductance, with time constant and angular frequency.
-
Cycling Power Calculator
Estimate the watts a target speed needs from your weight and gradient, or turn your power output into ride time and average speed.
-
Cycling Power Output Calculator
Calculate cycling power output in watts from speed and conditions, or work backwards from power to speed. Includes W/kg ratio, FTP zones and kJ burned.
-
Cycling Power Zones Calculator
Free cycling power zones calculator. Enter your FTP (Functional Threshold Power) to work out your 7 training zones in watts and W/kg, using the standard Coggan model.
-
Cylinder Surface Area Calculator
Calculate cylinder lateral surface area and total surface area from radius and height. Returns curved area, top and base area, and total SA. Worked example included.
-
Cylinder Volume Calculator (Litres, US and Imperial Gallons)
Free cylinder volume calculator. Enter radius or diameter and height to get volume in litres, cubic metres, US gallons, and imperial gallons.
-
Cylinder Volume in Litres Calculator
Enter radius, diameter or circumference plus height in cm or mm to get cylinder volume in litres, millilitres and cubic metres instantly.
Listed from the site's own index of its pages, rebuilt whenever pages change. Last reviewed 2026-09-06. See also every question the site answers, the finance glossary and the guides.