MATH & NUMBERS
Percentage Calculator
Solve the three common percentage questions in one place.
100% free
No sign-up
Private — runs in your browser
Instant results
KEY TAKEAWAYS
- Solve the three common percentage questions in one place.
- Free to use — no sign-up, no account and no usage limits.
- Runs entirely in your browser, so the numbers you enter stay private.
- Works on desktop and mobile with instant, accurate results.
Last updated: June 2026
About the Percentage Calculator
Pick a mode to work out 'what is X% of Y', 'X is what percent of Y', or the percentage change from one value to another.
Frequently asked questions
How do I find what percent one number is of another?
Choose the ratio mode: it divides the first number by the second and multiplies by 100.
Free online tool from ConvertFleet. Calculations run entirely in your browser — nothing you type is sent anywhere. Results are estimates for general guidance only.