Everyday math

Percentage calculator

Calculate a percentage of any number and find what percentage one value represents of another.

20% of 250

50

The known part represents

20%50 is 20% of 250.

Two percentage calculations in one tool

The first two fields answer “What is X% of a number?” The third answers “What percentage of the total is this part?” Both results update instantly.

How to calculate a percentage

To find a percentage of a number, multiply the total by the percentage and divide by 100. To find what percentage a part represents, divide the part by the total and multiply by 100.

Example

What is 20% of 250?

Multiply 250 by 20 and divide by 100. The answer is 50.

Reverse calculation

What percentage is 50 of 250?

Divide 50 by 250 and multiply by 100. The answer is 20%.

Frequently asked questions

How can I calculate 10% quickly?

Divide the number by 10. For example, 10% of 430 is 43.

Can I use decimals?

Yes. The calculator accepts decimal values in percentages and amounts.

Is a percentage the same as percentage change?

No. This tool finds a proportion. Percentage change compares an initial value with a final value.

What happens when the total is zero?

A part cannot be expressed as a percentage of zero because the calculation would require division by zero.