Free calculators for everyday percentages

Work out a discount, a price change or a profit margin in seconds. No sign-up, nothing to install, and every page shows the formula so you can check the answer.

Percentage CalculatorFind X% of a number, what percent one number is of another, or the total from a part. Discount CalculatorGet the sale price and your savings, or combine two discounts like 20% + 10% off. Percentage Increase CalculatorSee the percentage change between two numbers, or raise or lower a number by a percentage. Profit Margin CalculatorTurn cost and selling price into profit, margin and markup, or price for a target margin.

Which calculator do I need?

"What is 15% of 240?" Use the Percentage Calculator.
"How much will it cost after 20% off?" Use the Discount Calculator.
"By what percent did the price go up?" Use the Percentage Increase Calculator.
"What should I charge to make a 30% margin?" Use the Profit Margin Calculator.

Why use DiscountMargin

Private by design. The maths runs in your browser. The numbers you type are not sent to us.
Clear answers. Each result comes with a plain-English sentence, not just a number.
Checked against hand-worked examples. Decimals, zero values and invalid entries are all handled with a clear message.
Made for phones. Large inputs and a number keypad on mobile.

Results are for general information only. The calculators are tested, but please double-check anything important before relying on it for financial, tax, legal or medical decisions.