Percentage Calculator

How to use Percentage Calculator

1. Choose the type of calculation you need — find a percentage of a number, find what percent one number is of another, or calculate percentage change.
2. Enter your numbers.
3. The result updates instantly.

Frequently asked questions

How do I calculate a percentage increase or decrease?
Use the "percentage change" mode, enter the original and new values, and the tool works out both the change and whether it's an increase or decrease.

What's the formula for "what percent is X of Y"?
It's (X ÷ Y) × 100 — for example, 25 is 50% of 50, since 25 ÷ 50 × 100 = 50.

Can this handle percentages over 100%?
Yes — for example, calculating percentage increase from 50 to 150 correctly returns 200%, since the value tripled.