Percentage Calculator
Find a percent of a number, a ratio as a percent, or a percentage change — instantly.
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Choose a calculation and enter your numbers.
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Three of the most common percentage questions in one place: what is a percent of a number (like 15% of 240), what percent one number is of another (like 30 out of 80), and the percentage increase or decrease between two values. Just type your numbers and the answer appears instantly.
How to use
- Pick the type of percentage calculation.
- Enter the two numbers.
- Read the answer and the worked-out sentence.
Frequently asked questions
How do I find X% of a number?
Multiply the number by the percentage divided by 100. For example 20% of 150 is 150 × 0.20, which is 30.
How do I find percentage change?
Subtract the old value from the new value, divide by the old value, and multiply by 100.
Is it free and private?
Yes. It is free and runs entirely in your browser.