Percentage Calculator
Solve everyday percentage problems fast: what is X% of Y, X is what percent of Y, and percentage increase or decrease — all in one place.
How to calculate a percentage
- Pick the type of calculation you need.
- Enter your two numbers.
- The answer updates instantly as you type.
Everyday percentage examples
Work out a tip or discount, a test score, sales tax, a price markup, or how much a value changed between two figures. Each mode handles one of these common questions so you don’t have to remember the formula.
Frequently asked questions
How do I find what percent one number is of another?
Use the “X is what percent of Y” mode: enter the part and the whole, and it returns the percentage.
Can it calculate percentage increase and decrease?
Yes. Enter the original and new values and it shows the percentage change, positive or negative.
Is anything sent to a server?
No. All calculations run locally in your browser.