Percentage Calculator
Find what percent one number is of another instantly. Free percentage calculator for homework, tips, grades, and discounts.
How to use this percentage calculator
Percentage problems show up in discounts, grades, stats homework, and “what percent of my goal is this.” Enter the part and the whole. For money off a price, the discount calculator is a better fit; for tips, use the tip calculator.
Formula
Worked example
25 ÷ 200 × 100 = 12.5%.
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Frequently asked questions
Is this percentage calculator free?
Yes. It works instantly in your browser with no signup.
Are the results exact?
Results follow the stated formula, but real-world fees, timing, and rounding can vary.
How do I calculate a percentage?
Divide the part by the whole and multiply by 100. 25 is 12.5% of 200 because 25 ÷ 200 × 100 = 12.5.
How do I find X% of a number?
Multiply the number by the percent as a decimal. 20% of 80 is 80 × 0.20 = 16. Use the tip or discount calculators for those cases.
What is a percentage increase?
(New − old) ÷ old × 100. A jump from 80 to 100 is a 25% increase.
Is percent the same as percentile?
No. A percent is a ratio out of 100. A percentile is a rank in a distribution.
Results are estimates for informational purposes and are not financial, legal, or professional advice. Last reviewed 2026-08-20.