Percentage Calculator
Calculate percentages quickly and easily.
(20 ÷ 100) × 500 = 100
What is the Percentage Calculator?
A percentage calculator helps you work with percentages in everyday situations — finding a percentage of a number, working out what percentage one value is of another, or measuring a percentage increase or decrease. It's handy for shopping, tips, grades, taxes, and quick mental-math checks.
Formula & how it works
Part = (Percentage ÷ 100) × Whole- Percentage
- = the percent value (e.g. 20)
- Whole
- = the total or base number
For “X is what percent of Y”, divide X by Y and multiply by 100. For increase or decrease, divide the change by the original value.
Example
Find 20% of 500.
Inputs
- Percentage
- 20%
- Of value
- 500
Results
- Result
- 100
(20 ÷ 100) × 500 = 0.2 × 500 = 100.
How to use this calculator
- 1Choose the type of percentage calculation you need.
- 2Enter the two values in the input fields.
- 3The result updates instantly below the inputs.
- 4Use Copy or Share to save your calculation.
Frequently asked questions
How do I calculate a percentage of a number?+
Divide the percentage by 100, then multiply by the number. For example, 20% of 500 is (20 ÷ 100) × 500 = 100.
How do I find what percentage one number is of another?+
Divide the first number by the second, then multiply by 100. For example, 100 is (100 ÷ 500) × 100 = 20% of 500.
How is percentage increase calculated?+
Subtract the original value from the new value, divide by the original value, then multiply by 100.