Percentage Calculator
Calculate percentages instantly — find X% of Y, percentage increase/decrease, and what percent X is of Y. Free, no signup.
What is Percentage Calculator?
The Percentage Calculator covers the three most common percentage problems in one place: finding what X% of a number is, calculating the percentage change between two values, and figuring out what percentage one number is of another.
Percentage calculations come up constantly — discounts, tax, tips, grade curves, financial growth, data analysis. Instead of reaching for a spreadsheet or doing it by hand, just type in your numbers and get the answer instantly.
All calculations run in your browser. Nothing is sent to a server.
How to use
Frequently asked questions
Multiply Y by X and divide by 100. For example, 20% of 150 = 150 × 0.20 = 30.
Subtract the old value from the new value, divide by the old value, then multiply by 100. A result above 0 is an increase, below 0 is a decrease.
Divide X by Y and multiply by 100. For example, 30 is what % of 150? 30/150 × 100 = 20%.