Percentage Calculator
Every percentage calculation in one place: X% of Y, X is what % of Y, change from A to B, add/subtract %, add tax. Runs entirely in your browser.
Runs 100% in your browser — nothing is uploaded.
Result
30
15% of 200 = 30
Example:
15% of 200 = 30Frequently asked
How do I calculate a percentage increase?
Use "Change from A to B". Enter the original value as A and the new value as B. Positive result = increase, negative = decrease.
What is the difference between "% of" and "is what %"?
"% of" answers "15% of 200 is what?" (result: 30). "Is what %" answers "30 is what % of 200?" (result: 15%). Same numbers, inverse operation.
Can I use this for sales tax or markup?
Yes — use "Add tax / markup" to compute an amount plus a percentage. For gross-to-net (removing tax from a total), use "Decrease by %" with the tax rate.
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