How do I calculate a price after an increase?

Multiply the current price by one plus the increase expressed as a decimal. A 10 percent rise means multiplying by 1.10. The calculator does this for you and also shows the dollar change.

Does this include GST?

It works on whatever figure you enter, so the result is GST inclusive only if your starting price already includes GST. Keep your inputs consistent and the answer will match. Use a GST tool if you need to split out the tax.

Can I model a price decrease?

Yes. Enter a negative percentage and the calculator will return a lower price and a negative change. This is handy for testing discounts or planned price cuts.

Price Increase Calculator

A price increase calculator works out what a product or service will cost after you lift the price by a set percentage. You enter your current price and the percentage increase, and the tool returns the new price along with the dollar change, so you can see the impact at a glance. It is a quick way to model a planned rise before you commit to it, whether you run a cafe updating a menu, a tradesperson reviewing your hourly rate, a landlord adjusting rent, or a finance team passing on supplier cost rises across a range. The maths is simple but easy to fumble in your head, especially with awkward percentages or large prices, so having it laid out helps you stay consistent and avoid rounding mistakes that creep in across a whole price list. Seeing the dollar change next to the percentage also keeps you honest, because a modest looking percentage can still be a sizeable jump on a high value item. A few good habits make increases land better. Round to a sensible price point rather than an odd figure, since a tidy number reads as more deliberate and is easier for customers to accept. Give people fair notice and a clear reason where you can, as transparency protects goodwill. Finally, check the increase keeps your margin where you need it once your own costs are included, because a rise that simply matches inflation may not actually improve your position. Use this tool to test several scenarios side by side, compare a small regular rise against one larger jump, and choose the option that balances revenue with customer trust. All amounts are in New Zealand dollars.

Current price ($)

Increase (%)

$112.50

New price

Change$12.50

New price = current price x (1 + increase% / 100). Estimate only, not financial or tax advice.

How it works

The calculator turns the increase percentage into a multiplier by dividing it by 100 and adding 1. It multiplies your current price by that multiplier to get the new price. The change is simply the new price minus the current price.

Worked example

With a current price of $100 and a 12.5 percent increase, the multiplier is 1.125. Multiplying $100 by 1.125 gives a new price of $112.50. The change is $112.50 minus $100, which is $12.50.

Related calculators

Margin Calculator: profit margin from price.
Sales Tax Calculator: add or remove tax.
Gross Profit Calculator: gross profit on sales.

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