Every page starting with B
382 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.
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Baby Number Two Calculator NZ
Estimate the added cost of a second child in New Zealand, where some gear is reused but childcare and food rise.
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Babylonian Numbers Converter
Convert a decimal number into Babylonian base-60 digits. See the sexagesimal place values and the expanded form behind the ancient number system.
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Babysitting Cost Calculator NZ
Calculate the cost of a babysitter from the hourly rate, hours and number of children. Includes a per-extra-child surcharge to get a fair total for the night.
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Back Pay Tax Calculator NZ
Estimate the tax on a lump sum of back pay or arrears in New Zealand and the net you receive. Because it sits on top of your income, it is taxed at your marginal rate.
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Back to School Cost Calculator NZ
Add up the back-to-school cost per child in New Zealand: stationery, uniform, shoes, bag, technology, activities and the school donation, across several children.
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Bacon Curing Calculator
Work out the salt, sugar and cure #1 (pink curing salt) for an equilibrium bacon cure by meat weight, and check the nitrite level in ppm.
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Housing in Bader
What housing costs in Bader, Hamilton City: median weekly rent $420, the ownership and renting split, and household income, from the 2023 Census.
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Baker's Percentage Calculator
Free baker's percentage calculator. Enter ingredient weights and instantly see each one as a percentage of total flour weight.
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Balance Transfer Break-Even Calculator NZ
Does a balance transfer pay off? Weigh the interest saved at the promo rate against the transfer fee to see your net saving over the promo period.
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Housing in Balcairn
What housing costs in Balcairn, Hurunui District: median weekly rent $328, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Balclutha North
What housing costs in Balclutha North, Clutha District: median weekly rent $330, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Balclutha South
What housing costs in Balclutha South, Clutha District: median weekly rent $300, the ownership and renting split, and household income, from the 2023 Census.
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Ballistic Coefficient Calculator
Work out a bullet's ballistic coefficient from its weight, diameter and form factor. See the sectional density and BC used for drag and drop.
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Balloon Arch Calculator
Work out how many balloons you need for a balloon arch or organic garland from the length and fullness, with a suggested mix of large, small and accent.
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Housing in Balmoral
What housing costs in Balmoral, Auckland: median weekly rent $524, the ownership and renting split, and household income, from the 2023 Census.
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Baluster Calculator
Work out how many balusters or spindles you need for a railing, plus the even gap between them, keeping the gap under the 100 mm building code limit.
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Band-Pass Filter Calculator
Free band-pass filter calculator. Enter the lower and upper cutoff frequencies to get the centre frequency, the bandwidth and the quality factor.
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Bandwidth Calculator
Calculate total bandwidth for multiple users, throughput in MB per second, and transfer time for a file. Returns Mbps required, time to transfer and data rate.
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Bandwidth-Delay Product Calculator
Calculate the bandwidth-delay product (BDP) for any network link. Enter bandwidth and round-trip time to find the optimal TCP receive window and in-flight data size.
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Bank Account Security and 2FA
How to keep your bank account secure in New Zealand, how two-factor authentication protects you, spotting scams, and the habits that stop fraudsters reaching your money.
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Bank Accounts When Someone Dies
What happens to bank accounts when someone dies in NZ: notifying the bank, frozen and joint accounts, the $40,000 probate threshold and term deposits.
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Bank and Credit Fees: what NZ households spend per week
What New Zealand households spend on bank and credit fees each week, from the Stats NZ Household Economic Survey 2023, with every survey year since 2007 and what the...
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Bank Test Rate Calculator NZ 2026/27
See the loan your advertised mortgage rate suggests versus what a bank's higher 8.0% to 9.0% test rate will actually approve. Free NZ calculator.
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Banked Curve Calculator
Calculate the ideal banking angle for a curve from the speed and radius, with no reliance on friction. Free banked curve calculator using the physics of circular motion.
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Banking and everyday money
Fourteen steps through payslips, cards, overdrafts, savings accounts, term deposits, deposit protection and sending money overseas in New Zealand, with calculators.
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Banking Angle Calculator NZ
Calculate the ideal banking angle for a curve from the speed and radius, so a vehicle can corner without relying on friction. Enter speed and radius for the angle.
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Banking Hardship Support
The hardship support your bank can offer when repayments will not stretch, how to apply, and what it means for your loans and credit. NZ.
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Bankruptcy in New Zealand
How NZ bankruptcy works: three years, what you keep, the business and travel restrictions, and why it clears a student loan when a No Asset Procedure does not.
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Bankruptcy in New Zealand Explained
How bankruptcy works in New Zealand: the 3-year term, what the Official Assignee can sell, income contributions, your restrictions, and the NAP and DRO alternatives.
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Housing in Banks Peninsula Eastern Bays
What housing costs in Banks Peninsula Eastern Bays, Christchurch City: median weekly rent $210, the ownership and renting split, and household income, from the 2023...
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Housing in Banks Peninsula South
What housing costs in Banks Peninsula South, Christchurch City: median weekly rent $300, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Bankside
What housing costs in Bankside, Selwyn District: median weekly rent $225, the ownership and renting split, and household income, from the 2023 Census.
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Bar to ATM Conversion Calculator
Convert bar to atmospheres (atm) instantly. 1 bar = 0.986923 atm. Free online pressure converter with worked examples, formula, and reverse ATM to bar conversion.
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Bar to PSI Conversion Calculator
Convert bar to PSI instantly. 1 bar = 14.5038 psi. Free bar to pounds per square inch converter with formula, worked examples, and a reverse PSI to bar table.
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Barfoot & Thompson Commission Calculator
Estimate Barfoot & Thompson real estate commission on a New Zealand property sale. Free calculator using Barfoot & Thompson's tiered structure, with GST. Indicative...
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Barn Pole Paradox Calculator
Explore the barn pole paradox from special relativity: enter a pole length, barn length and speed to see length contraction and whether the pole fits in.
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Barometric Pressure Conversion Calculator
Convert barometric pressure between hPa, mbar, inHg, mmHg, kPa, Pa, bar, atm, and psi. Enter any unit and get instant results for all others.
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Housing in Barrier Islands
What housing costs in Barrier Islands, Auckland: median weekly rent $208, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Barrytown
What housing costs in Barrytown, Grey District: median weekly rent $200, the ownership and renting split, and household income, from the 2023 Census.
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Basal Area Calculator
Calculate tree basal area from diameter at breast height (DBH) and stand basal area per hectare. Uses the standard formula BA = pi x DBH squared / 4.
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Basal Metabolic Rate Calculator
Calculate your Basal Metabolic Rate (BMR) using the Mifflin-St Jeor formula. Find how many calories your body burns at complete rest. Metric and imperial inputs.
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Base Converter (Binary, Octal, Decimal, Hexadecimal)
Free base converter. Enter a number and its base to convert between binary, octal, decimal and hexadecimal instantly, with digit validation.
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Base of a Triangle Calculator
Find the base of a triangle from its area and height, from three known sides using Heron's formula, or from the legs of a right triangle.
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Base-n Converter
Convert any number between two bases from 2 to 36. Enter the number, choose the from-base and to-base, and get the converted result with step-by-step division working.
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Base32 Encoder & Decoder NZ
Encode text to Base32 or decode Base32 back to text, using the RFC 4648 standard alphabet. Runs entirely in your browser; nothing is uploaded.
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Base58 Encoder & Decoder NZ
Encode text to Base58 or decode Base58 back to text, using the Bitcoin alphabet. Base58 avoids confusable characters. Runs entirely in your browser; nothing is uploaded.
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Base64 Encoder and Decoder
Encode text to Base64 or decode Base64 back to plain text. Returns encoded string, decoded output and character count. Runs entirely in your browser using btoa and atob.
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Basis Point Calculator
Convert basis points to a percentage and a decimal, see the dollar impact on any amount, and add the change to a starting interest rate. 1 basis point is.
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Housing in Bastia-Durie Hill
What housing costs in Bastia-Durie Hill, Whanganui District: median weekly rent $350, the ownership and renting split, and household income, from the 2023 Census.
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Bathroom Mirror Size Calculator
Work out the right bathroom mirror width for your vanity, the maximum flush width, and how high to mount it above the floor. Simple guideline sizing for any.
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Battery Capacity and Runtime Calculator
Free battery capacity calculator. Enter the capacity in amp-hours, the load current and the voltage to get the runtime and the energy in watt-hours.
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Battery Charge Time Calculator
Estimate how long a battery takes to charge from its capacity in amp hours, the charge needed, the charger current, and charging efficiency. Works for any.
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Battery Size Calculator
Work out the battery capacity you need in amp-hours and kWh from your load in watts, runtime, system voltage, depth of discharge and efficiency.
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Batting Average Calculator
Work out a cricket batting average from total runs, innings and not outs. Shows dismissals, runs per innings and the average to two decimals.
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Batting Strike Rate Calculator
Work out a cricket batting strike rate from runs and balls faced. Shows runs per 100 balls, runs per over and your scoring rate.
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Baud Rate Calculator
Convert between bit rate and baud (symbol rate) using bits per symbol. Shows the symbol rate, modulation states and bits per symbol.
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Housing in Baverstock
What housing costs in Baverstock, Auckland: median weekly rent $750, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Bay View (Napier City)
What housing costs in Bay View (Napier City), Napier City: median weekly rent $400, the ownership and renting split, and household income, from the 2023 Census.
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Bayes Theorem Calculator
Calculate the posterior probability using Bayes theorem. Enter P(A), P(B|A), and P(B|not A) to get P(A|B), P(B), and the likelihood ratio in one step.
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Bayleys Commission Calculator
Estimate Bayleys real estate commission on a New Zealand property sale. Free calculator using Bayleys's tiered structure, with GST. Indicative only, verify with the...
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Housing in Baypark-Kairua
What housing costs in Baypark-Kairua, Tauranga City: median weekly rent $550, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Bayswater
What housing costs in Bayswater, Auckland: median weekly rent $300, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Bayview East (Auckland)
What housing costs in Bayview East (Auckland), Auckland: median weekly rent $590, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Bayview South (Auckland)
What housing costs in Bayview South (Auckland), Auckland: median weekly rent $594, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Bayview West (Auckland)
What housing costs in Bayview West (Auckland), Auckland: median weekly rent $550, the ownership and renting split, and household income, from the 2023 Census.
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BBQ Grill Size Calculator
Work out the barbecue cooking area you need for your guests in square centimetres and inches, plus how many burgers fit and the grill size class.
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BC to AD Calculator
Convert BC years to AD years, find how many years elapsed between two historical dates, and convert to astronomical year numbering.
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Housing in Beach Haven East
What housing costs in Beach Haven East, Auckland: median weekly rent $316, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Beach Haven South
What housing costs in Beach Haven South, Auckland: median weekly rent $560, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Beach Haven West
What housing costs in Beach Haven West, Auckland: median weekly rent $550, the ownership and renting split, and household income, from the 2023 Census.
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Beam Bending Stress Calculator
Calculate bending stress in a beam from bending moment, distance to the neutral axis and second moment of area using sigma equals M c over I. Clear SI units.
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Beam Deflection Calculator
Calculate maximum deflection and bending moment for a simply supported beam with a central point load. Enter span, load, Young's modulus, and moment of inertia.
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Beam Load Calculator
Work out support reactions, maximum shear and bending moment for a simply supported beam under a uniform load plus a central point load.
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Bean Bag Filling Calculator
Work out how many litres of beans a beanbag needs from its width, depth and height, with the number of 100 L bags to buy.
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Bearing Calculator
Free bearing calculator. Enter the east and north components to get the compass bearing (0 to 360 degrees clockwise from north) and the straight line distance.
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Beat Frequency Calculator
Calculate the beat frequency when two sound waves of slightly different frequencies interfere.
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Housing in Beckenham
What housing costs in Beckenham, Christchurch City: median weekly rent $475, the ownership and renting split, and household income, from the 2023 Census.
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Becoming a landlord
Ten steps through letting property in New Zealand: real yield after costs, rental income tax, interest deductibility, ring-fencing, healthy homes, boarders, short stay...
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Bed Size Calculator
Check which NZ bed size fits your room. Enter room width and length and a mattress size to see the clearance each side, at the ends and floor left.
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Bedtime Sleep Cycle Calculator NZ
Work out the best times to go to bed to wake up refreshed, based on 90-minute sleep cycles and the time it takes to fall asleep, for your chosen wake time.
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Beer-Lambert Absorbance Calculator
Calculate absorbance and transmittance using the Beer-Lambert law, A equals molar absorptivity times concentration times path length. Clear spectroscopy tool.
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Beer-Lambert Law Calculator NZ
Calculate absorbance with the Beer-Lambert law from molar absorptivity, path length and concentration, and find the transmittance. For spectrophotometry.
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Housing in Beerescourt
What housing costs in Beerescourt, Hamilton City: median weekly rent $520, the ownership and renting split, and household income, from the 2023 Census.
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Being an Executor
A step by step NZ guide to being an executor of a will: probate and the $40,000 threshold, notifying banks, paying debts and tax, then distributing safely.
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Housing in Belfast East
What housing costs in Belfast East, Christchurch City: median weekly rent $470, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Belfast West
What housing costs in Belfast West, Christchurch City: median weekly rent $450, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Bell Block Central
What housing costs in Bell Block Central, New Plymouth District: median weekly rent $400, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Bell Block East-Puketapu
What housing costs in Bell Block East-Puketapu, New Plymouth District: median weekly rent $530, the ownership and renting split, and household income, from the 2023...
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Housing in Bell Block West
What housing costs in Bell Block West, New Plymouth District: median weekly rent $420, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Belleknowes
What housing costs in Belleknowes, Dunedin City: median weekly rent $490, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Bellevue
What housing costs in Bellevue, Tauranga City: median weekly rent $520, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Belmont (Auckland)
What housing costs in Belmont (Auckland), Auckland: median weekly rent $550, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Belmont (Lower Hutt City)
What housing costs in Belmont (Lower Hutt City), Lower Hutt City: median weekly rent $555, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Belmont Park
What housing costs in Belmont Park, Lower Hutt City: median weekly rent $260, the ownership and renting split, and household income, from the 2023 Census.
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Belt Length Calculator
Calculate belt length for open or crossed belt drives from pulley diameters and centre distance. Returns belt length, contact angles, and arc of contact on each pulley.
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Belt Size Calculator
Work out your belt size from your pants waist size. Enter your pants size in inches and get the recommended belt size in inches and centimetres.
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Housing in Ben Cooper Park
What housing costs in Ben Cooper Park, Tasman District: median weekly rent $490, the ownership and renting split, and household income, from the 2023 Census.
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Bend Allowance Calculator
Calculate sheet metal bend allowance from bend angle, inside radius, thickness and K-factor. Returns bend allowance, bend deduction and outside setback in mm.
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Bending Stress Calculator NZ
Calculate the bending stress in a beam from the bending moment, distance from the neutral axis and second moment of area, using the flexure formula.
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Benefit Advances and Temporary Additional Support
An advance is a loan repaid from your benefit. Temporary Additional Support is not. Knowing which to ask for is worth more than most people realise.
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Benefit Entitlement Calculator NZ 2026
Estimate Jobseeker Support, Sole Parent Support and Supported Living Payment at current MSD rates, plus the Accommodation Supplement.
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Benefits, ACC and student support questions, answered
ACC levies and weekly compensation, Working for Families, the Accommodation Supplement, superannuation, student loans and allowances.
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Benford's Law Calculator
Find the Benford's law probability for any leading digit 1 to 9, with the expected count in your sample and the cumulative share up to that digit.
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Housing in Benhar-Stirling
What housing costs in Benhar-Stirling, Clutha District: median weekly rent $300, the ownership and renting split, and household income, from the 2023 Census.
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Bereavement Leave Calculator NZ 2026
Bereavement leave in NZ: 3 days for immediate family, 1 day otherwise, the 6 month eligibility test, and what the leave costs an employer with cover.
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Housing in Berhampore
What housing costs in Berhampore, Wellington City: median weekly rent $450, the ownership and renting split, and household income, from the 2023 Census.
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Bernoulli Equation Calculator
Solve the Bernoulli equation for pressure at a second point: enter pressure, velocity and height at point 1 and velocity and height at point 2.
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Bertrand's Box Paradox Calculator
Solve Bertrand's box paradox. You draw a gold coin from a random box: see the chance the other coin is also gold, worked with Bayes' theorem.
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Bertrand's Paradox Calculator
Explore Bertrand's paradox: the chance a random chord beats a given length, by three methods that famously give three different answers.
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Bessel Functions Calculator
Calculate Bessel functions of the first and second kind for any order and argument. Useful for solving differential equations in cylindrical coordinates and wave physics.
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Best FIF Calculator NZ
The best FIF calculator for New Zealand helps you work out foreign investment fund income under the FDR and comparative value methods. Compare the options here.
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Best Financial Calculator Website NZ
A direct answer to which financial calculator website is best in New Zealand, on measurable grounds, with the main options named fairly.
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Best Start Payment Calculator NZ
Estimate the Best Start payment for your child's early years: the likely weekly and annual amount, and how it abates as family income rises.
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Beta Distribution Calculator
Work out the mean, variance, mode, skewness, PDF and CDF of a beta distribution from its two shape parameters alpha and beta, with a worked example.
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Beta Stock Calculator
Calculate a stock's beta from its returns and the market's returns using the covariance over variance method, and see the correlation and volatility too.
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Housing in Bethlehem Central
What housing costs in Bethlehem Central, Tauranga City: median weekly rent $640, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Bethlehem North
What housing costs in Bethlehem North, Tauranga City: median weekly rent $450, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Bethlehem South
What housing costs in Bethlehem South, Tauranga City: median weekly rent $457, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Bexley
What housing costs in Bexley, Christchurch City: median weekly rent $347, the ownership and renting split, and household income, from the 2023 Census.
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Bi-Weekly Mortgage Payment Calculator NZ
Calculate your bi-weekly (fortnightly) mortgage payment and see how much interest you save compared to monthly repayments. Works for any NZ home loan. Free and instant.
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Bike Cadence and Speed Calculator
Work out your cycling speed from cadence, chainring and sprocket teeth and wheel size, or find the cadence you need to hold a target speed in any gear.
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Bike EMI Calculator NZ
Calculate your monthly EMI (equated monthly instalment) for a bike or motorcycle loan in NZ.
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Bike Gear Calculator
Work out gear inches, gear ratio and metres of development for any bike gear from your chainring and sprocket teeth and wheel diameter, with speed at 90 rpm.
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Bike Pace Calculator
Work out your average cycling speed and pace from a ride distance and time. Get speed in km/h and mph plus pace per km and per mile for your bike ride.
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Bike Size Calculator
Find your recommended bike frame size from your height and inseam for a road, hybrid or mountain bike, plus a saddle height guide and a size band.
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Bikini Size Calculator
Find your bikini size from your bust, underbust and hip measurements. Get a recommended top size (band and cup) and bikini bottom size in NZ sizing.
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NZ Bill Split Calculator 2026
Free NZ bill split calculator. Split restaurant, utility, or shared household bills evenly or by custom amounts. See the GST breakdown on any amount.
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Billable Hours Calculator
Work out billable revenue and your utilisation from hours worked, billable hours and your rate. See revenue, utilisation percent and non-billable hours fast.
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Billion to Trillion Converter
Convert billions to trillions instantly. 1 trillion = 1,000 billions. With reverse conversion, scientific notation and worked examples.
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Binary Addition Calculator
Free binary addition calculator. Add two binary numbers instantly and see the step-by-step carry process, decimal equivalents, and full working.
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Binary Converter
Free binary converter. Convert numbers between binary, decimal, hexadecimal, and octal instantly, with a clear explanation of how each system works.
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Binary Division Calculator
Free binary division calculator. Divide two binary numbers and see the step-by-step long division working, quotient, and remainder in binary and decimal.
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Binary Fraction Converter
Convert decimal fractions to binary and binary fractions to decimal. Supports mixed numbers with integer and fractional parts.
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Binary Hex Octal Decimal Converter
Enter a number in any base and see it in all four: binary, hexadecimal, octal and decimal. Type in any field and all others update instantly.
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Binary Multiplication Calculator
Multiply two binary numbers instantly. Shows the full step-by-step working, partial products, and converts the result to decimal, hexadecimal, and octal.
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Binary Subtraction Calculator
Binary subtraction calculator. Subtract two binary numbers with step-by-step working shown. Supports unsigned and signed results.
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Binary to Hexadecimal Converter
Convert binary numbers to hexadecimal instantly. Enter any binary value (0s and 1s) and get the hex equivalent with a step-by-step breakdown of each 4-bit nibble group.
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Binary to Text Converter NZ
Convert text to binary and binary back to text. Each character becomes its 8-bit binary code via UTF-8. Paste text or binary digits to convert instantly in your browser.
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Binomial Confidence Interval Calculator
Calculate a confidence interval for a binomial proportion using the Wilson score method, which is accurate even for small samples or extreme proportions.
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Binomial Distribution Calculator
Calculate binomial distribution probabilities for any number of trials, successes, and probability.
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Binomial Expansion Calculator
Expand (a+b) to the power n by the binomial theorem: every term with its coefficient, the Pascal's triangle row, and the full expansion to n = 10.
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Binomial Theorem Calculator
Free binomial theorem calculator. Enter a, b and n to expand (a + b)^n, showing each term and its binomial coefficient.
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Biot Number Calculator
Calculate the Biot number Bi = h x Lc / k from the heat transfer coefficient, characteristic length and thermal conductivity, and check if the lumped model.
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Housing in Birchville-Brown Owl
What housing costs in Birchville-Brown Owl, Upper Hutt City: median weekly rent $500, the ownership and renting split, and household income, from the 2023 Census.
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Bird Age Calculator
Convert your bird's age into human years using its typical species lifespan. Pick from budgies, cockatiels, parrots and more, and see the life stage.
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Housing in Bird Area
What housing costs in Bird Area, Taupo District: median weekly rent $450, the ownership and renting split, and household income, from the 2023 Census.
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Birdsmouth Cut Calculator
Work out the birdsmouth heel height, roof pitch angle and remaining rafter depth for a rafter seat cut, with a check against the one third depth rule.
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Housing in Birdwood West
What housing costs in Birdwood West, Auckland: median weekly rent $530, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Birkdale Central
What housing costs in Birkdale Central, Auckland: median weekly rent $560, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Birkdale North
What housing costs in Birkdale North, Auckland: median weekly rent $520, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Birkdale South
What housing costs in Birkdale South, Auckland: median weekly rent $560, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Birkenhead North
What housing costs in Birkenhead North, Auckland: median weekly rent $550, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Birkenhead North West
What housing costs in Birkenhead North West, Auckland: median weekly rent $594, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Birkenhead South
What housing costs in Birkenhead South, Auckland: median weekly rent $550, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Birkenhead West
What housing costs in Birkenhead West, Auckland: median weekly rent $570, the ownership and renting split, and household income, from the 2023 Census.
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Birth From Death Date Calculator
Work out a person's birth year and birth date range from their date of death and age at death. Ideal for headstones, records and family history research.
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Birth Weight Percentile Calculator
Calculate your newborn's birth weight percentile by gestational age and sex. Uses INTERGROWTH-21st standards. Covers 24 to 42 weeks for boys and girls.
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Birth Year Calculator
Enter your age and whether you have had your birthday this year to find the year you were born. See both possible birth years instantly.
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Birthday Calculator
Enter your date of birth to see the day of the week you were born, your age now, and exactly how many days until your next birthday.
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Birthday Paradox Calculator
Work out the probability that at least two people in a group share a birthday. Enter the group size to see the shared-birthday odds, the chance of no match.
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Bisection Method Calculator
Find a root of a function on an interval using the bisection method. Free bisection method calculator that halves the interval until it converges on the root.
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Housing in Bishopdale North
What housing costs in Bishopdale North, Christchurch City: median weekly rent $430, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Bishopdale South
What housing costs in Bishopdale South, Christchurch City: median weekly rent $466, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Bishopdale West
What housing costs in Bishopdale West, Christchurch City: median weekly rent $400, the ownership and renting split, and household income, from the 2023 Census.
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Bit Shift Calculator
Shift an integer left or right by any number of bits. See the left shift, signed right shift and unsigned right shift results in decimal and binary using.
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Bitwise Calculator
Calculate bitwise AND, OR, XOR and NOT for two integers. Returns decimal and binary results for all four operations with bit-pattern display.
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Biweekly Mortgage Calculator
Free biweekly mortgage calculator. See how making payments every two weeks instead of monthly reduces your loan term and total interest paid.
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Black-Scholes Calculator
Price a European call or put option with the Black-Scholes model. Enter the spot price, strike, time to expiry, risk-free rate and volatility to get the.
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Blackbody Radiation Calculator
Enter a temperature to get the peak emission wavelength from Wien's law, the total radiant exitance from the Stefan-Boltzmann law, the peak frequency and.
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Bladder Volume Calculator
Calculate bladder volume from ultrasound measurements with the ellipsoid formula V = 0.523 x L x W x H, in mL with an interpretation guide.
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Housing in Blagdon-Lynmouth
What housing costs in Blagdon-Lynmouth, New Plymouth District: median weekly rent $400, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Blaketown
What housing costs in Blaketown, Grey District: median weekly rent $270, the ownership and renting split, and household income, from the 2023 Census.
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Blast Radius Calculator
Estimate the distance at which a chosen blast overpressure occurs for a given charge of TNT, using the Kinney-Graham scaling law. Shows the radius, scaled.
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Housing in Bledisloe Park
What housing costs in Bledisloe Park, Napier City: median weekly rent $480, the ownership and renting split, and household income, from the 2023 Census.
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Blended Rate Calculator NZ
Work out the blended interest rate across your loans and cards. Enter each balance and rate to see your weighted average rate and yearly interest cost.
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Housing in Blenheim Central
What housing costs in Blenheim Central, Marlborough District: median weekly rent $380, the ownership and renting split, and household income, from the 2023 Census.
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Blind Size Calculator NZ
Work out the right blind width and drop for an inside or outside mount. Enter your window measurements and clearances to get the size to order.
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Housing in Blockhouse Bay Central
What housing costs in Blockhouse Bay Central, Auckland: median weekly rent $574, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Blockhouse Bay East
What housing costs in Blockhouse Bay East, Auckland: median weekly rent $582, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Blockhouse Bay North
What housing costs in Blockhouse Bay North, Auckland: median weekly rent $506, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Blockhouse Bay North East
What housing costs in Blockhouse Bay North East, Auckland: median weekly rent $600, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Blockhouse Bay South
What housing costs in Blockhouse Bay South, Auckland: median weekly rent $630, the ownership and renting split, and household income, from the 2023 Census.
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Blood Alcohol Calculator NZ 2026
Estimate your blood alcohol concentration (BAC) from standard drinks, body weight and time, using the Widmark formula.
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Blood Donor Calculator NZ
Work out when you can next give blood, plasma or platelets and how often you can donate in a year. Enter your last donation date and type.
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Blood Type Calculator NZ
Predict a child's possible blood types from the parents' ABO and Rh blood groups. See which types are possible and whether Rh negative can occur.
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Blood Volume Calculator NZ
Estimate your total blood volume from height, weight and sex using Nadler's formula. See the result in litres, millilitres and mL per kilogram.
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Housing in Bluff
What housing costs in Bluff, Invercargill City: median weekly rent $260, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Bluff Hill
What housing costs in Bluff Hill, Napier City: median weekly rent $440, the ownership and renting split, and household income, from the 2023 Census.
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BMI Calculator for Men NZ
Work out your BMI, the healthy weight range for your height and an estimated body fat percentage for men, with notes on muscle mass and reading the result.
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BMI Calculator for Women NZ
Work out your BMI, the healthy weight range for your height and an estimated body fat percentage for women, with NZ guidance on reading the result.
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BMI Calculator NZ 2026
Calculate your BMI (Body Mass Index) and see your healthy weight range. Uses WHO BMI categories with metric and imperial inputs. Includes BMI interpretation for adults.
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BMI Weight Loss Calculator NZ
See how much weight to lose to reach a target BMI. Enter your height, current weight and target BMI to get your goal weight and healthy range.
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BMR Calculator
Work out your basal metabolic rate using the Mifflin-St Jeor equation, with the Harris-Benedict result alongside it, in both calories and kilojoules.
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BNPL True Cost Calculator NZ
Turn Buy Now Pay Later fees into an effective annual interest rate in New Zealand, so you can see how expensive a BNPL plan really is compared with other credit.
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Board and Batten Calculator NZ
Work out how many boards and battens you need for a board and batten wall. Enter the wall size, board width and gap to get counts and lengths.
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Board Foot Calculator
Free board foot calculator. Enter thickness, width and length to calculate board feet of timber. Works for single boards or multiple pieces.
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Board-on-Board Fence Calculator
Calculate the number of boards, posts, and rails needed for a board-on-board (shadow board) fence.
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Boarder / Flatmate Income Standard-Cost Calculator NZ
Work out whether your boarder income is taxable in New Zealand using the IRD standard-cost method, and the tax on any income above the standard-cost threshold.
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Boarder Income Calculator NZ
Work out whether income from boarders is taxable in New Zealand using the standard-cost method. Enter weekly board, number of boarders and the weekly standard cost.
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Boarders and Flatmates Tax
The tax difference between flatmates, boarders and tenants in New Zealand, including IRD's weekly standard-cost method and when boarder income is tax-free.
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Boarders, Flatmates and Tenants NZ
Boarder, flatmate or tenant: which the Residential Tenancies Act covers, boarding house rules, and the $245 standard cost that can make the income tax free.
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Boat Loan Repayment Calculator NZ 2026
Calculate your boat loan monthly repayments, total interest, and full loan cost. Enter the boat price, deposit, interest rate, and term to see a complete loan breakdown.
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Boat Speed Calculator
Work out a displacement boat's theoretical hull speed from its waterline length, shown in knots, kilometres per hour and miles per hour.
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Boats and Major Equipment: what NZ households spend per week
What New Zealand households spend on boats and major equipment each week, from the Stats NZ Household Economic Survey 2023, with every survey year since 2007 and what...
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Body Corp vs Freehold Ownership Cost Calculator NZ
Compare the ongoing ownership costs of a body corporate apartment against a freehold house in New Zealand, weighing levies, rates, insurance and maintenance side by side.
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NZ Body Corporate Cost Calculator
Annual levies, the long-term maintenance fund, special levies, GST treatment and deductibility for NZ unit title properties. Free calculator.
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Body Corporate Levies Explained
The operating fund, long-term maintenance fund and special levies, how levies are set by unit entitlement, and what to check before buying.
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Body Corporate Levy Forecast Calculator NZ
Forecast how body corporate levies on a New Zealand apartment could rise over time, with the future annual levy and the total you would pay over the period.
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Body Corporate Special Levy Calculator NZ
Work out your share of a one-off body corporate special levy for a unit-title building in New Zealand.
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Body Fat Calculator
Free body fat calculator using the US Navy method. Enter a few measurements to estimate your body fat percentage and category.
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Body Fat Percentage Calculator NZ
Estimate your body fat percentage with the US Navy tape method using your height, neck and waist measurements (and hip for women), no scales or callipers needed.
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Body Frame Size Calculator
Find your body frame size from your height and wrist measurement. See whether you have a small, medium or large frame using the height to wrist ratio method.
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Body Shape Calculator
Enter your bust, waist and hip measurements to find your body shape: hourglass, pear, apple, inverted triangle or rectangle, plus your waist-to-hip ratio.
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Boiler Size Calculator
Estimate the boiler or heater output your home needs from its floor area, ceiling height and insulation level, shown in kilowatts and BTU per hour.
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Boiling Point at Altitude Calculator
Work out the boiling point of water at any altitude. Enter your elevation to see the boiling temperature and the air pressure that lowers it.
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Boiling Point Elevation Calculator
Calculate boiling point elevation from molality, the van't Hoff factor and the boiling point constant. Free delta Tb calculator showing the raised boiling point.
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Bold Text Generator
Type text and copy bold, italic, bold italic and sans-serif bold Unicode versions that survive in social bios, comments and names where formatting is stripped.
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Bolt Circle Calculator
Enter the pitch circle diameter and number of bolts to get XY coordinates for each hole, the chord length between bolts and the angular spacing.
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Bolt Torque Calculator
Calculate the tightening torque needed for a bolt from its diameter, target preload and the nut factor K. Get the torque in newton metres instantly.
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Bolt Torque Calculator NZ
Calculate the preload tension (clamping force) in a bolt from the tightening torque, bolt diameter and nut factor, using the standard torque-tension relationship.
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Housing in Bombay Hills
What housing costs in Bombay Hills, Auckland: median weekly rent $520, the ownership and renting split, and household income, from the 2023 Census.
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Bond Convexity Calculator
Calculate a bond's convexity, price, and modified duration from its face value, coupon rate, yield, term and payment frequency. See sensitivity to yield moves.
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Bond Current Yield Calculator
Calculate a bond's current yield from its face value, coupon rate and market price. See the annual coupon income as a percentage of what you pay.
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Bond Energy Calculator
Free bond energy calculator. Enter the total energy of bonds broken and bonds formed to estimate the reaction enthalpy.
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Bond Equivalent Yield Calculator
Calculate the bond equivalent yield of a discount instrument like a Treasury bill from its face value, purchase price and days to maturity.
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Bond Ladder Builder Calculator NZ
Split your money across staggered term deposit or bond maturities, with the amount per rung and the annual income shown. Built for New Zealand savers.
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Bond Order Calculator
Work out the bond order of a molecule from its bonding and antibonding electrons. Uses the molecular orbital formula and tells you if the bond is single.
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Bond Price Calculator
Work out the fair price of a bond from its face value, coupon rate, years to maturity and market yield. Shows the present value of the coupons and the face.
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Bonds and Fixed Income
How bonds and fixed income work: lending for regular interest, how prices move with rates, the role bonds play in a portfolio, and the risks to watch.
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Bonferroni Correction Calculator
Apply the Bonferroni correction for multiple comparisons. Get the corrected significance threshold and the adjusted p-value from your alpha and number of tests.
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NZ Bonus & Commission Tax Calculator 2026/27
Free NZ bonus and commission tax calculator. Applies the extra emolument tax rate based on annualised income. 2026/27 rates.
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Bonus Saver Accounts
How NZ bonus saver accounts work: the low base rate, the monthly conditions that unlock the bonus, how one withdrawal wipes it, and when a simpler account wins.
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Bonus to KiwiSaver Calculator NZ
Compare taking a work bonus as cash against directing it to KiwiSaver in New Zealand, including the long-term growth.
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Books, News and Stationery: what NZ households spend per week
What New Zealand households spend on books, news and stationery each week, from the Stats NZ Household Economic Survey 2023, with every survey year since 2007 and what...
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Borrowing Capacity Calculator NZ 2026
Calculate how much you can borrow for a New Zealand home loan based on your repayment capacity, interest rate, and loan term.
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Borrowing Capacity Guide
Complete guide to borrowing capacity in NZ. Learn how banks calculate what you can borrow, income assessment, DTI ratios, stress testing, and maximizing borrowing power.
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Borrowing Power Calculator NZ 2026
Free NZ borrowing power calculator. Enter your income, expenses, and debts to estimate your maximum home loan amount. Uses NZ bank stress-test rates and PAYE tax.
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Housing in Botany Downs East
What housing costs in Botany Downs East, Auckland: median weekly rent $650, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Botany Downs West
What housing costs in Botany Downs West, Auckland: median weekly rent $620, the ownership and renting split, and household income, from the 2023 Census.
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Bottled Gas Cost Calculator NZ
Work out the yearly cost of bottled LPG for cooking, hot water or heating in New Zealand, from the bottles you use and the price per refill.
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Housing in Boulcott
What housing costs in Boulcott, Lower Hutt City: median weekly rent $500, the ownership and renting split, and household income, from the 2023 Census.
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Bounce Rate Calculator
Calculate your website bounce rate instantly. Enter total sessions and single-page sessions to get the bounce rate percentage.
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Bowl Segment Calculator
Work out the miter angle and segment lengths for a segmented turning ring. Enter the number of segments, ring diameter and board width to get the cut sizes.
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Bowling Average Calculator
Work out a cricket bowling average from runs conceded, wickets taken and overs bowled. Also shows the economy rate and bowling strike rate.
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Box Method Calculator
Multiply two whole numbers with the box method (area model). Enter the numbers to see each place value split, the grid of partial products, and the final.
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Box Plot Calculator
Paste your data to get the five-number summary, interquartile range, whisker range and any outliers, with a box and whisker plot drawn from your numbers.
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Boyle's Law Calculator
Solve Boyle's Law for any unknown: P1, V1, P2, or V2. Returns the missing gas variable from three known values using P1V1 = P2V2 at constant temperature.
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BPM Calculator
Convert BPM to ms per beat, eighth and sixteenth notes and a full bar of 4/4, or tap in time to find any song's tempo. Handy for delay and reverb timing.
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Bra Size Calculator NZ
Free NZ bra size calculator. Enter your underbust and bust measurements in centimetres to find your UK and NZ band and cup size, with a fitting guide.
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Bradford Factor Calculator NZ 2026/27
Score absence for one employee or a whole team using spells squared times days, with the trigger bands used in NZ and UK attendance policies.
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Bragg's Law Calculator
Use Bragg's law to find the interplanar spacing d from the diffraction order, wavelength and Bragg angle. Results in nanometres and angstroms with the.
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Housing in Branston
What housing costs in Branston, Christchurch City: median weekly rent $460, the ownership and renting split, and household income, from the 2023 Census.
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Break Even Milk Price Calculator NZ
Work out the milk price your dairy farm needs to cover farm working expenses, interest, rent, tax and drawings, and compare it against the current forecast and its range.
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Break Fee vs Stay Calculator NZ
Decide whether breaking a fixed mortgage to refix at a lower rate is worth the break fee in New Zealand.
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Break-Even Calculator
Free break-even calculator. Enter your fixed costs, price per unit, and variable cost per unit to find the units and sales you need to break even.
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Break-Even Sale Price Calculator NZ
The sale price your NZ house must reach before you get your money back: purchase costs, what you spent on it, commission, GST, marketing and break fees.
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Breaker Size Calculator
Work out the circuit breaker size for a load from its power and voltage. Adds the continuous-load allowance and rounds up to the next standard MCB rating.
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Breaking a Fixed Mortgage Guide
Understand break fees on a fixed-rate mortgage in New Zealand: why they exist, what drives their size, when breaking is worth it.
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Housing in Bream Bay
What housing costs in Bream Bay, Whangarei District: median weekly rent $383, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Bream Head
What housing costs in Bream Head, Whangarei District: median weekly rent $460, the ownership and renting split, and household income, from the 2023 Census.
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Breastfeeding Calorie Calculator
Estimate how many calories you need each day while breastfeeding. Combines your maintenance energy with the extra your body uses to make milk.
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Housing in Bremner Ridge
What housing costs in Bremner Ridge, Auckland: median weekly rent $690, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Brentwood (Taupo District)
What housing costs in Brentwood (Taupo District), Taupo District: median weekly rent $500, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Brentwood (Upper Hutt City)
What housing costs in Brentwood (Upper Hutt City), Upper Hutt City: median weekly rent $450, the ownership and renting split, and household income, from the 2023 Census.
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Brewster's Angle Calculator
Calculate Brewster's angle (polarisation angle) for any two media using their refractive indices. Instant result in degrees, with full explanation of the physics.
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Brick Calculator
Free brick calculator. Enter your wall area and the bricks per square metre to work out how many bricks you need, with a waste allowance.
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Housing in Bridge Pa
What housing costs in Bridge Pa, Hastings District: median weekly rent $380, the ownership and renting split, and household income, from the 2023 Census.
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Bridge Rectifier Calculator
Work out the DC output, peak voltage and ripple from a full-wave bridge rectifier: enter your AC secondary voltage, load current and smoothing capacitor.
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Bridging Loan Calculator NZ
Estimate the cost of bridging finance when you buy a new home before selling your current one in New Zealand.
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NZ Bright-Line Test Calculator 2026
Find out if the NZ bright-line test applies to your property sale and estimate your tax liability.
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Bright-Line Test Date Calculator NZ
Check whether a property sale falls within the 2-year bright-line period. Enter the acquisition and sale dates to see if any gain could be taxable.
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Bright-Line Test Explained - New Zealand
Complete guide to NZ's bright-line property rule. Learn when sales are taxable, main home exclusion, ownership periods, and why keeping records matters.
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Housing in Brighton
What housing costs in Brighton, Dunedin City: median weekly rent $408, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Brightwater
What housing costs in Brightwater, Tasman District: median weekly rent $488, the ownership and renting split, and household income, from the 2023 Census.
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Brine Calculator
Work out how much salt to add for a brine at any percentage. Enter your water volume and the brine strength for pickling, fermenting or brining meat.
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Housing in Britannia
What housing costs in Britannia, Nelson City: median weekly rent $460, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Broad Bay-Portobello
What housing costs in Broad Bay-Portobello, Dunedin City: median weekly rent $387, the ownership and renting split, and household income, from the 2023 Census.
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Broad Crested Weir Calculator
Calculate the discharge over a broad crested weir from the crest width, upstream head and discharge coefficient. Get flow in cubic metres and litres per second.
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Broadband Cost Calculator NZ
Compare broadband plans in New Zealand on total cost over the contract, including setup, monthly fees and any introductory discount.
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Housing in Broadgreen-Monaco
What housing costs in Broadgreen-Monaco, Nelson City: median weekly rent $440, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Broadmeadows
What housing costs in Broadmeadows, Wellington City: median weekly rent $647, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Brockville
What housing costs in Brockville, Dunedin City: median weekly rent $172, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Broken Run
What housing costs in Broken Run, Christchurch City: median weekly rent $620, the ownership and renting split, and household income, from the 2023 Census.
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Brokerage Fee Calculator NZ
See how brokerage and transaction fees affect your share and fund investing in New Zealand, especially on small or frequent trades.
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Housing in Bromley South
What housing costs in Bromley South, Christchurch City: median weekly rent $340, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Brookfield East
What housing costs in Brookfield East, Tauranga City: median weekly rent $488, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Brookfield West
What housing costs in Brookfield West, Tauranga City: median weekly rent $550, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Brookhaven-Ferrymead
What housing costs in Brookhaven-Ferrymead, Christchurch City: median weekly rent $470, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Brooklands-Spencerville
What housing costs in Brooklands-Spencerville, Christchurch City: median weekly rent $405, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Brooklyn East
What housing costs in Brooklyn East, Wellington City: median weekly rent $560, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Brooklyn North
What housing costs in Brooklyn North, Wellington City: median weekly rent $600, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Brooklyn South
What housing costs in Brooklyn South, Wellington City: median weekly rent $650, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Brookvale
What housing costs in Brookvale, Hastings District: median weekly rent $650, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Broomfield
What housing costs in Broomfield, Christchurch City: median weekly rent $178, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Browns Bay Central
What housing costs in Browns Bay Central, Auckland: median weekly rent $600, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Browns Bay South East
What housing costs in Browns Bay South East, Auckland: median weekly rent $660, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Browns Bay South West
What housing costs in Browns Bay South West, Auckland: median weekly rent $660, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Bruce
What housing costs in Bruce, Clutha District: median weekly rent $250, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Brunswick-Papaiti
What housing costs in Brunswick-Papaiti, Whanganui District: median weekly rent $330, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Bryndwr North
What housing costs in Bryndwr North, Christchurch City: median weekly rent $390, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Bryndwr South
What housing costs in Bryndwr South, Christchurch City: median weekly rent $390, the ownership and renting split, and household income, from the 2023 Census.
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BSFC Calculator
Calculate brake specific fuel consumption in g/kWh from fuel flow and power output. Get BSFC, fuel mass flow, thermal efficiency and lb/hp-hr.
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BTU/hr to Tons of Refrigeration Converter
Convert BTU/hr to tons of refrigeration and kilowatts instantly. 1 ton = 12,000 BTU/hr. Free converter for air conditioners, heat pumps, and HVAC systems.
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Buck Converter Calculator
Calculate the duty cycle, inductor ripple current and output ripple voltage of a buck converter from input voltage, output voltage, frequency, inductor and.
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Housing in Buckland
What housing costs in Buckland, Auckland: median weekly rent $480, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Bucklands Beach Central
What housing costs in Bucklands Beach Central, Auckland: median weekly rent $650, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Bucklands Beach Murvale
What housing costs in Bucklands Beach Murvale, Auckland: median weekly rent $640, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Bucklands Beach North
What housing costs in Bucklands Beach North, Auckland: median weekly rent $695, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Bucklands Beach South
What housing costs in Bucklands Beach South, Auckland: median weekly rent $600, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Bucklands Crossing
What housing costs in Bucklands Crossing, Dunedin City: median weekly rent $344, the ownership and renting split, and household income, from the 2023 Census.
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Budget Calculator NZ 2026
Free NZ budget calculator with the 50/30/20 rule. Track income and expenses across needs, wants and savings.
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Budgeting and prices questions, answered
Household budgets, splitting costs, comparing prices and working out what something really costs you.
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Budgeting Methods for NZ Households
Budgeting for NZ households: the common methods, irregular expenses, pay cycles, variable income, automation and couples.
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Budgeting on an Irregular Income
How to budget when your income changes week to week in New Zealand, using a baseline, a buffer account, and paying yourself a steady wage from variable earnings.
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Buffer Capacity Calculator
Calculate buffer capacity with the Van Slyke equation from total concentration, pKa and pH: the acid or base a buffer absorbs per litre per pH unit.
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Buffer pH Calculator
Calculate buffer pH with the Henderson-Hasselbalch equation from pKa, weak acid concentration and conjugate base concentration.
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Bug and Rivet Paradox Calculator
Explore the bug and rivet paradox with real numbers. Enter the speed and lengths to see length contraction in each frame and why the bug is crushed either way.
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Build Cost per Square Metre Calculator NZ
Estimate a NZ new build from a dollar-per-square-metre rate: enter floor area and build quality for a ballpark cost plus contingency.
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Build vs Buy Existing Home Calculator NZ
Compare the total cost of building a new home against buying an existing house in New Zealand, including land, build, consents and any renovation.
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Building a House in New Zealand
Building a house in NZ: contracts, consents, progress payments, variations, delays, cashflow, insurance and the common mistakes.
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Building Inspection and Due Diligence Cost Calculator NZ
Add up the pre-purchase due diligence costs for a New Zealand home, including a builder's report, LIM, registered valuation, meth test and legal review, before you buy.
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Building Inspection Reports
What a building inspection report covers when buying property in New Zealand, how it differs from a LIM, what it can and cannot find, and how to use it in your decision.
-
Bulb Spacing Calculator
Work out how many flower bulbs to plant in a bed. Enter the bed size and spacing to get the number of bulbs needed and the planting density per square metre.
-
Bulk Modulus Calculator
Calculate the bulk modulus of a material from the applied pressure and the change in volume. Get bulk modulus in GPa and MPa plus the compressibility.
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Housing in Buller Coalfields
What housing costs in Buller Coalfields, Buller District: median weekly rent $200, the ownership and renting split, and household income, from the 2023 Census.
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Bullet Energy Calculator
Work out the kinetic energy of a bullet from its weight in grains and velocity in fps. Get energy in foot-pounds and joules, plus velocity in m/s and momentum.
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Housing in Bulls
What housing costs in Bulls, Rangitikei District: median weekly rent $320, the ownership and renting split, and household income, from the 2023 Census.
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Buoyancy Calculator
Calculate buoyant force using Archimedes' principle F = rho·g·V. Enter fluid density and submerged volume.
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Buoyant Force Calculator (Archimedes' Principle)
Free buoyant force calculator. Use Archimedes' principle (F = rho x V x g) to find the upward force on an object submerged in any fluid.
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Housing in Burbank
What housing costs in Burbank, Auckland: median weekly rent $500, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Burbush-Baverstock
What housing costs in Burbush-Baverstock, Hamilton City: median weekly rent $580, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Burleigh
What housing costs in Burleigh, Marlborough District: median weekly rent $500, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Burlington-Oakbridge
What housing costs in Burlington-Oakbridge, Christchurch City: median weekly rent $600, the ownership and renting split, and household income, from the 2023 Census.
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Burn Multiple Calculator
Calculate your Burn Multiple by dividing net cash burn by net new ARR. Measure how much your SaaS business burns to generate each dollar of new recurring revenue.
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Burn Rate Calculator
Work out your gross and net monthly burn rate from spend and revenue. See how fast your startup is using cash each month and plan your runway.
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Housing in Burnham Camp
What housing costs in Burnham Camp, Selwyn District: median weekly rent $290, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Burnside
What housing costs in Burnside, Christchurch City: median weekly rent $455, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Burnside Park
What housing costs in Burnside Park, Christchurch City: median weekly rent $490, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Burnside West
What housing costs in Burnside West, Christchurch City: median weekly rent $480, the ownership and renting split, and household income, from the 2023 Census.
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Burpee Calorie Calculator
Estimate the calories you burn doing burpees from your body weight, rep count and pace, using the standard MET method for vigorous calisthenics.
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Housing in Burswood
What housing costs in Burswood, Auckland: median weekly rent $630, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Burwood North
What housing costs in Burwood North, Christchurch City: median weekly rent $430, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Burwood South
What housing costs in Burwood South, Christchurch City: median weekly rent $440, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Bush Inn
What housing costs in Bush Inn, Christchurch City: median weekly rent $440, the ownership and renting split, and household income, from the 2023 Census.
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Housing in Bush Road
What housing costs in Bush Road, Dunedin City: median weekly rent $358, the ownership and renting split, and household income, from the 2023 Census.
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Business Acquisition Calculator NZ 2026/27
Cash flow after debt service and your own wage, cash-on-cash return, payback, DSCR and the maximum price a NZ business purchase supports.
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Business Budget Calculator
Build a simple monthly business budget: enter revenue and expenses to see total costs, net profit, net margin and your annual profit. NZ dollars.
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Business Cash Buffer Calculator NZ 2026/27
Set a target operating reserve in months of fixed costs, payroll and debt, adjusted for volatility and debtor days, and see your shortfall. NZ.
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NZ Business Days Calculator 2026
Free NZ business days calculator. Count working days between two dates excluding weekends and NZ public holidays.
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Business Debt Restructure Calculator NZ 2026/27
Free NZ business debt restructure calculator. Compare your current facilities against extending the term, switching to interest only, consolidating or refinancing.
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Business GST Calculator NZ 2026
Calculate New Zealand GST at 15% for business use. Add GST to get the tax-inclusive price, or remove GST from an inclusive amount. Instant NZ business GST tool.
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Business Health Check Calculator NZ 2026/27
Enter your P and L and balance sheet for a scored read across profitability, liquidity, leverage and efficiency, from margins to debt to equity.
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Business Income Tax Calculator NZ 2026
Calculate NZ business income tax for standard companies (28%), trusts (39%), Maori authorities (17.5%), non-profits, and self-employed. Updated for 2026/27 IRD tax rates.
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Business Interruption Cover Calculator NZ
Estimate the business interruption sum insured your New Zealand business needs, based on gross profit, the indemnity period and additional increased costs of working.
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Business Loan Repayment Calculator NZ 2026
Work out NZ business loan repayments, total interest and full loan cost. Free for small businesses, sole traders and enterprises modelling finance.
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Business Loan Structure Calculator NZ 2026/27
Compare table P and I, interest-only then P and I, revolving credit and a split: monthly repayment, total interest and year one cash cost. NZ.
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Business Sale Proceeds Calculator NZ 2026/27
Sale price less bank debt, broker and legal fees, plus shareholder current account, earnout weighting and depreciation recovery tax. Free NZ tool.
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Business Startup Cost Calculator NZ 2026
Add up the cost of starting a business in New Zealand: registration, equipment, stock, marketing, premises and a working capital buffer.
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Business Stress Test Calculator NZ 2026/27
What a 10 to 50 percent fall in sales does to your cash: months of survival, when cash goes negative, and the revenue floor that keeps you solvent.
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Business Structure Basics
Sole trader vs partnership vs company in New Zealand: how each is taxed, how liability differs, and how to choose the right structure for your business.
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Business Surplus Cash Calculator NZ 2026/27
Where should a company hold surplus cash? Compare accounts, term deposits and funds after the 28% company rate, and why the PIE advantage drops away.
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Business Valuation Calculator
Estimate the value of a business using an earnings multiple. Enter SDE or EBITDA and a multiple to see an indicative valuation and a sensible value range.
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Buy a House vs Build in a New Subdivision Calculator NZ
Compare buying an existing house against buying a section in a new subdivision and building, in New Zealand. Total each option, including section, build and site costs.
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Buy Now Pay Later - Hidden Risks Explained - NZ
Buy Now Pay Later risks in NZ: the behavioural traps, account stacking, late fees, credit impact and how to regain control.
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Buy Now Pay Later: The Real Cost Calculator NZ
See the real yearly cost of Buy Now Pay Later in New Zealand: the late fees and account fees that add up, shown as a dollar total and a percentage of what you spend.
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Buy vs Hire Tools and Equipment Calculator NZ
Should you buy or hire that tool or piece of equipment? Enter the purchase price, hire rate, and how often you need it.
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Buy vs Hire Tools Calculator NZ 2026
Buy or hire a tool in New Zealand? Compare the net cost of buying against total hire cost and see the break-even number of uses.
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Buy vs Lease Commercial Premises Calculator NZ 2026
Compare the annual cost of buying commercial premises against leasing in New Zealand, allowing for the mortgage, outgoings and equity built.
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Buying a Car: Cash vs Finance - New Zealand
Comprehensive guide to buying a car in NZ: cash vs finance, ownership vs obligation, cashflow, depreciation, opportunity cost, emotional drivers, and affordability.
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Buying a First Home - The Legal Process (NZ)
The legal process of buying a first home: conditional offers, the S and P agreement, due diligence, going unconditional and settlement. NZ.
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Buying a Franchise in NZ
NZ has no franchising law, no mandatory disclosure and no cooling-off period. What that means, and why royalties on turnover are where the risk sits.
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Buying a home questions, answered
Deposits and first homes, what a place really costs to own, rates and insurance, building, and buying against renting.
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Buying a Home With Family
Buying a home with friends or family in NZ: joint tenancy vs tenants in common, co-ownership agreements, joint and several mortgage liability, and exit planning.
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Buying an Apartment: Unit Titles
Unit titles due diligence for NZ apartment buyers: the body corporate, levies, the maintenance fund, the disclosure statements and the red flags to check.
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Buying and running a car
Eleven steps from what a first car really costs to road user charges, finance, insurance and claiming vehicle expenses, with a calculator at every step.
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Buying Off the Plans
How buying off the plans works in NZ: the 10% deposit held in trust, sunset clauses, the finance and valuation risk at settlement, GST and new-build LVR rules.
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Buying Power Calculator
See how inflation erodes purchasing power: enter an amount, period and inflation rate to find what it is worth today or in the future.
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Buying something other than a standard house
Twelve steps through unit titles, body corporate levies, buying off the plans, leasehold, earthquake prone buildings, flood risk, rates and running costs in New Zealand.
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Buying Your First Car Guide
A first-time car buyer guide for New Zealand: setting a realistic budget, the true on-road costs, why a pre-purchase inspection matters.
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Buying your first home
Sixteen steps from working out whether to buy at all through to settlement, in the order the decisions arrive, each paired with a New Zealand calculator.
- By the Numbers
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Byte Conversion Calculator
Convert bits, bytes, kilobytes, megabytes, gigabytes, terabytes and petabytes in both binary (1024) and decimal (1000) systems at once.
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.