How to use Percentage Calculator
- Pick the question you want to answer.
- Enter the numbers – results appear instantly.
- Read the formula line to see how it was calculated.
Examples
- 15% of 80 = 12 (80 × 15 ÷ 100).
- From 50 to 65 is a +30% change ((65 − 50) ÷ 50 × 100).
- Percentage difference between 40 and 60 is 40% (|40 − 60| ÷ 50 × 100).
Supported formats
| Input | Numbers |
|---|---|
| Output | Result with formula |
| Processing | On your device, in the browser (no upload) |
Limitations to know
- Results are rounded to up to 6 decimal places for display.
Privacy: Percentage Calculator runs entirely in your web browser. Your Numbers data is not uploaded, stored or shared, and nothing about its contents is sent to analytics.
Frequently asked questions
How do I calculate a percentage of a number?
Multiply the number by the percentage and divide by 100. For example, 20% of 150 is 150 × 20 ÷ 100 = 30.
How do I calculate percentage increase?
Subtract the old value from the new value, divide by the old value, and multiply by 100. From 80 to 100: (100 − 80) ÷ 80 × 100 = 25%.
What is the difference between percentage change and percentage difference?
Percentage change compares a new value to an original one. Percentage difference compares two values with no “original”, dividing by their average.