Percentage Calculator
Work out percentages, increases and differences.
Runs entirely in your browser
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How to use
- Pick the question you are answering: a percentage of a number, what percentage one number is of another, or the change between two numbers.
- Enter the two values. A comma or a full stop both work as the decimal separator.
- Select Calculate, or press Enter.
- Check the formula shown under the result to confirm the calculation is the one you meant.
Features
- Three calculations covering almost every everyday percentage question.
- The formula is shown with your numbers substituted in.
- Handles decimals, negative values and comma decimal separators.
- Percentage change uses the magnitude of the starting value, so negative-to-negative moves read correctly.
Frequently asked questions
- What is the difference between percentage change and percentage points?
- Percentage change compares two numbers relative to the first one: 5% to 10% is a 100% increase. Percentage points measure the plain difference, which in that example is 5 points. This tool calculates percentage change.
- How do I calculate a discount?
- Use the first mode to find the discount amount, for example 20% of 150 is 30, then subtract it from the original price to get 120.
- Why is the change from -50 to -25 shown as +50%?
- The change is measured against the size of the starting value, so a move of 25 against a starting magnitude of 50 is 50%. It is positive because -25 is greater than -50.
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