Math
Percentages
Three percentage calculations in one tool. Because I can never remember the formulas.
Esc Clear
Result
Enter two values to get a result
What does Percentages?
A percentage calculator that finds X% of a number, determines what percentage one number is of another, and computes the percentage change between two values.
How to use Percentages?
- Choose the calculation type from the dropdown.
- Enter the numbers in the relevant fields.
- The result updates instantly — click it to copy.
Key features
- Three calculation modes: percent of, what percent, and percent change
- Instant results with no button press needed
- Saves your last values between page reloads
Frequently asked questions
What is the difference between "percent change" and "what percent"?
Percent change calculates the growth or decrease between two values — for example from 80 to 100 is 25%. "What percent" gives the ratio — 80 out of 100 is 80%.
Can I calculate a negative percentage?
Yes. Enter a higher value in the first field to get a negative change result.
Is this tool free?
Yes, this tool is completely free and requires no registration.
Is my data saved?
No. All calculations happen in your browser only — no data is sent to any server.