Percentage Calculator
Calculate percentages with this free online percentage calculator: X% of Y, what percent X is of Y, percent increase or decrease and percent difference.
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Part of the toolkit
How to use Percentage Calculator
- 1Pick what you want to calculate: X% of Y, X is what % of Y, X is Y% of what, % increase/decrease, % difference, or add/subtract a percentage
- 2Type your two numbers; the answer updates instantly with the formula used
- 3Click Copy result to paste the answer anywhere, or Swap values to reverse the calculation
Frequently asked questions
How do I calculate a percentage of a number?▾
Divide the percentage by 100 and multiply by the number. For example, 20% of 150 = 20 ÷ 100 × 150 = 30.
How do I find what percent one number is of another?▾
Divide the part by the whole and multiply by 100. For example, 30 is 30 ÷ 120 × 100 = 25% of 120.
How do I calculate percentage increase or decrease?▾
Subtract the old value from the new value, divide by the old value, then multiply by 100. Going from 80 to 100 is (100 − 80) ÷ 80 × 100 = 25% increase.
What is the difference between percentage change and percentage difference?▾
Percentage change compares a new value to an original one, so direction matters. Percentage difference compares two values symmetrically by dividing their gap by their average, so order does not matter.
How do I add or subtract a percentage from a number?▾
Multiply the number by (1 + p/100) to add or (1 − p/100) to subtract. Adding 15% to 250 gives 287.5; subtracting 15% gives 212.5.
Is this percentage calculator free?▾
Yes. It is free, needs no signup, and runs entirely in your browser.
Embed Percentage Calculator on your website▾
Paste this snippet into your page. The embedded tool runs in your visitor's browser and shows a small “Powered by clkr.work” link.