Online tool
Percentage calculator
A quick calculator for everyday percentage math: discounts, fees, growth, and finding one number as a share of another.
X% of Y
150
X is what percent of Y
15%
Increase by X%
1 150
Decrease by X%
850
FAQ
How do I calculate 15% of 1000?
Enter 15 as the percentage and 1000 as the number. The result is 150.
How do I find what percent X is of Y?
Enter the part and the whole. The tool divides X by Y and multiplies by 100.
Do I need an account to use Percentage calculator?
No. It is free and works without registration.
Is my data sent to a server?
Calculations and conversions run locally in your browser. The only exception is the IP page, where the server returns your IP address.
Does it work on mobile?
Yes. The layout is responsive and works on phones, tablets, and desktop screens.