Percentage Calculator

Find a percent of a number, percentage change, and what % one number is of another.

Enter values

Value (X)

Of total (Y)

—

percent = (X / Y) × 100

All calculations run locally in your browser and update instantly as you type.

How do I find what percent X is of Y?+

Divide X by Y and multiply by 100. For example, 25 is 12.5% of 200 because 25 / 200 × 100 = 12.5.

How do I add a percentage to a number?+

Multiply the number by (1 + percent/100). To add 20% to 50: 50 × 1.20 = 60.

All calculations run locally in your browser. Nothing you type is sent to a server.