Percentage Calculator
Calculate percentages, percentage of a number, and percentage change.
20
10% of 200
How to calculate percentages
Work out what percent one number is of another, find a percentage of a value, or calculate the percentage increase or decrease between two numbers. Just type the figures and read the answer instantly. It handles the everyday percentage maths that's easy to fumble in your head.
Everyday percentage problems solved
Use it for discounts and sale prices, tips, tax, exam scores, commission, and tracking growth or change over time. Getting percentages right matters for money and grades alike. The calculation runs entirely in your browser — fast, free and with nothing sent to a server.
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Frequently Asked Questions
What percentage calculations are supported?
You can calculate X percent of Y, what percent X is of Y, and the percentage change from X to Y.
What is percentage change?
It is the increase or decrease from one value to another, shown as a percentage of the starting value.
What everyday tasks is it useful for?
Discounts, tips, tax, grades, growth rates, and comparing before-and-after figures.
Is the percentage calculator free?
Yes. It runs instantly in your browser with no sign-up and nothing uploaded.