Percentage Calculator
Find a percent of a number, what percent one number is of another, or percentage change — instantly and privately.
How to use
- Pick the kind of calculation you need.
- Enter your two values.
- Click Calculate to see the result and the formula behind it.
Percentage formulas
X% of Y = (X / 100) × Y X is what % of Y = (X / Y) × 100 % change X→Y = ((Y − X) / X) × 100
FAQ
What is 15% of 200?
200 × 15 ÷ 100 = 30.
How is percentage change calculated?
((new − original) ÷ original) × 100. A rise from 80 to 100 is a 25% increase.
Is it private?
Yes — everything runs in your browser.