Percentage Calculator
Three common percentage problems, solved instantly.
What is X% of Y?
% of
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X is what percent of Y?
is what % of
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Percentage change from X to Y
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Percentage math comes up constantly — figuring out a discount, a tip, a grade, or how much something changed — this handles the three most common percentage questions instantly as you type.
How it works
- Pick the calculation you needFinding a percentage, working out what percent one number is of another, or measuring a change.
- Type in your numbersAll three calculators update live as you type — no button to click.
- Read the resultShown instantly next to the fields you filled in.
FAQ
How do I calculate a percentage increase or decrease?
Use the "Percentage change" calculator — enter the starting and ending values to see the exact percent change.
Can I use this for discounts and tips?
Yes — the "What is X% of Y" calculator works for discounts, tips, tax, and any percentage-of-a-number problem.