Percentage Calculator Online Free
Find X% of any number quickly and get the result instantly.
Free online percentage calculator
Use this percentage calculator to find a percentage of a number. Enter the percentage and the number it applies to, then click Calculate to see the result instantly.
Percentage calculations are useful for discounts, taxes, tips, statistics, grades, and everyday comparisons. This calculator focuses on the common task of finding a percentage of a number.
How to use it
- Enter the percentage.
- Enter the number the percentage applies to.
- Click Calculate and review the result.
Example
To find 20% of 150, enter 20 as the percentage and 150 as the number. The result is 30.
Learn the formula
For formulas and worked examples, read How to Calculate a Percentage. For percentage changes, see How to Calculate Percentage Increase and Decrease.
Why use ToolAlto?
ToolAlto provides fast, free online tools for everyday tasks. We keep the experience simple, with no unnecessary signup.
Frequently asked questions
How do you calculate a percentage of a number?
Convert the percentage to a decimal and multiply it by the number. For example, 20% of 50 is 0.20 × 50 = 10.
Does this tool calculate percentage increase or decrease?
No. This version calculates a percentage of a number. For a discount amount and sale price, you can use the Discount Calculator.
Where can I learn the percentage formulas?
See the How to Calculate a Percentage guide for formulas, worked examples, percentage change, discounts, and common mistakes.
Is this percentage calculator free?
Yes. ToolAlto's percentage calculator is free to use online.