FREE TOOL · ON YOUR DEVICE
Percentage calculator for free
Five percentage calculations on one page, each with the formula under the result. For example: 15% of 80 is 12; 30 is 25% of 120, and from 80 to 100 is a 25% increase. And if a price with 21% tax is 121, it was 100 before tax.
- Free with an account
- Five calculations
- Formula shown
- Find your question
- Type the numbers
- Check the formula and copy
HOW TO USE IT
Three steps.
Find your question
Pick the matching block: X% of Y, what percent X is of Y, add or subtract a percentage, change from A to B, or reverse percentage.
Type the numbers
Use a period or a comma for decimals. The result appears as you type.
Check the formula and copy
Under each result you see the calculation. Press “Copy” to take the figure with you.
NEXT STEP
Keep going with these tools
Percentage calculator: common questions
How do you work out a percentage of a number?
Divide the percentage by 100 and multiply by the number: 15% of 80 is 15 ÷ 100 × 80 = 12.
Why does a 20% cut followed by a 20% rise not give the same price?
Because each percentage applies to a different amount: 100 − 20% = 80, and 80 + 20% = 96. Going from 80 back to 100 takes a 25% rise. The reverse percentage does that calculation.
How do I calculate the percentage increase between two values?
Subtract the initial value from the final one, divide by the initial value and multiply by 100: from 80 to 100 is (100 − 80) ÷ 80 × 100 = 25%. If it is negative, it is a decrease.
Is my data sent to a server?
No. The numbers, dates and names you type are calculated in your browser and are not sent to Cocuyo or to any third party.
Is it really free?
Yes. You can try it before signing up; to keep using it, we ask for a free account, with no subscription. It uses no credits and does not count toward your 30 welcome uses: it has no usage cap.
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