Percentage Calculator
Calculate any percentage instantly with three built-in modes. Find what percent one number is of another, calculate percentage change, or find a percentage of any value. Free and instant.
Last updated: March 2026
How to use Percentage Calculator
1
Select a mode: percent of, percent is, or percent change
2
Enter your values in X and Y fields
3
Click "Calculate" to run the selected formula
4
Use the result for reporting, pricing, or analysis
When to use this tool
- Calculating discounts and tax rates
- Checking growth or decline percentages
- Analyzing exam or KPI performance
- Working out financial percentage changes
Frequently Asked Questions
What modes are available?
Three: percent of, what percent is, and percent change.
Works with decimals?
Yes. You can use decimal values in all calculations.
Negative percentages supported?
Yes. Negative values are supported for decreases.
Is it free?
Yes. This calculator is free to use.