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Percentage Calculator
Calculate a percentage of a number, find what percent one number is of another, and measure percentage change.
How to Use
- Pick the calculation type from the three options.
- Enter both values in the inputs.
- Click Calculate to see the result.
- Use Reset to clear the fields.
Example
- 20% of 150 = 30
- 45 is what percent of 60 = 75%
- Change from 80 to 100 = +25%
Frequently Asked Questions
What is the formula for X% of Y?
Divide X by 100, then multiply by Y. For example, 20% of 150 is (20 ÷ 100) × 150 = 30.
How do I calculate percentage change?
Subtract the original value from the new value, divide by the original value, then multiply by 100. A negative result means a decrease.
Can I use decimal values?
Yes. Both inputs accept decimals, and results are shown with up to six decimal places.