Pick a calculation type below and get an instant, live result.
Pick one of the three calculation types on the left — finding a percentage of a number, finding what percent one number is of another, or finding the percentage increase or decrease between two values. Enter your numbers and the result updates instantly.
These calculations come up constantly in everyday life — figuring out a restaurant tip, a store discount, exam scores, or how much a value has grown or shrunk over time.
Yes — use the "% increase / decrease" mode with the discounted price as "From" and work backward, or use "X is what % of Y" if you know the discounted amount and percentage off.
Going from 20% to 25% is a 5 percentage point increase, but a 25% relative increase in the value itself. This calculator's "% increase/decrease" mode calculates the relative (percent) change.
Yes — all three calculation modes accept decimals as well as whole numbers.
Use "% increase / decrease" with the original price as "From" and the discounted price as "To" — it will show the percentage drop.
Yes, all three modes support negative numbers and will calculate accordingly.
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