Percentage Calculator
Three quick percentage tools in one place — work out a percentage of a number, find what percentage one number is of another, or measure a percentage increase or decrease. All instant, all in your browser.
What is X% of Y?
X is what % of Y?
Percentage increase / decrease
How to use
- Pick the calculation you need — a percentage of a number, a percentage share, or a percentage change.
- Type the two numbers into the matching boxes and click Calculate.
- Read the answer right below the button; use another section for a different question.
Frequently asked questions
How do I find 20% of 250?
Multiply 250 by 20 and divide by 100 — that gives 50. The first calculator above does exactly this: enter 20 and 250 and it returns 50.
How do I work out a percentage increase?
Subtract the old value from the new value, divide by the old value, and multiply by 100. For example, going from 80 to 100 is (100 − 80) ÷ 80 × 100 = a 25% increase. A negative result means a decrease.
What is the difference between percent and percentage points?
Percent is a relative change; percentage points are the plain difference between two percentages. Going from 20% to 25% is a 5 percentage-point rise, but a 25% relative increase.
Can I use decimals?
Yes — all three calculators accept decimal numbers, so you can work with values like 12.5% or 1,499.99. Use it as a percentage calculator free — no signup, nothing to install.
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