Percentage Calculator
Do the three most common percentage calculations on one page: percentage amount, ratio, and percentage change.
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What is % of ?
Result
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is what percent of ?
Result
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What is the percentage change from to ?
Change
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How to Use
- 1Enter your numbers in the relevant fields.
- 2Results update instantly as you type.
- 3Use all three calculation types on the same page.
Frequently Asked Questions
What's the difference between percentage change and percentage of?
"X% of Y" gives you a portion of a number, while percentage change tells you how much a value increased or decreased relative to its starting point.
Can I calculate a percentage decrease as well as an increase?
Yes, the percentage change calculator handles both — a negative result means a decrease, a positive result means an increase.
How do I find what percentage one number is of another?
Divide the part by the whole and multiply by 100 — for example, 25 out of 200 is 25 ÷ 200 × 100 = 12.5%. The ratio calculator does this for you.