Calculators
Percentage Calculator
Percent of, percent change, and reverse-percentage in one place.
Runs entirely in your browser — nothing is uploaded
Result
30
15% of 200
Frequently asked questions
How do I calculate percentage increase?
Subtract the old value from the new, divide by the old, and multiply by 100. The calculator does this and shows the steps.
What is a reverse percentage?
Working out the original value before a percentage was added or removed — for example finding the pre-discount price from a sale price.