Percentage calculator

Three calculators on one page. Results appear as you type.

What is X% of a number?

Percentage %

Of the number

The first number is what % of the second?

First number

Second number

Percentage increase or decrease (e.g. discounts)

Old value

New value

How do you calculate a percentage?

To find a percentage of a number, multiply the number by the percentage and divide by 100. Example: 20% of 150 = 150 × 20 ÷ 100 = 30.

To find the percentage change: (new value − old value) ÷ old value × 100.