Percentage calculator
Three common percentage questions, answered as you type.
How it works
X% of Y is Y × X ÷ 100. To find what share X is of Y, divide X by Y and multiply by 100. Percentage change is (new − old) ÷ old × 100.
Frequently asked questions
Is this tool free?
Yes. It’s free to use, with no account and nothing to install.
Is my data private?
Yes. This tool works entirely on your device: nothing you enter or open is sent to a server.
Does it work on a phone?
Yes. It works in the browser of any recent phone, tablet or computer.