What is the Percentage Increase Calculator?
Increase or decrease a number by a percentage.
Enter starting value, percentage and direction and the Percentage Increase Calculator returns result and amount of change. Results update as you type, and nothing you enter leaves your device.
How it is calculated
Result = Value × (1 ± Percentage ÷ 100)
How to use it
- Enter starting value.
- Enter percentage in %.
- Choose direction.
- Read result in the results panel. It updates as you type.
- Change any value to compare scenarios, or use Share to send the result as a link.
Worked example
Common questions
What formula does the Percentage Increase Calculator use?
It uses: Result = Value × (1 ± Percentage ÷ 100).
What do I need to use the Percentage Increase Calculator?
You need starting value, percentage and direction. Sensible starting values are filled in so you can see how it works straight away.
Is the Percentage Increase Calculator free, and is my data stored?
It is free with no sign-up. The calculation runs in your browser, so the values you enter are not sent to or stored on our server.