Percentage calculator
X% of Y, percent change.
About this tool
Work out percentages, increases, decreases and ratios without reaching for a formula. Type the numbers and read the answer immediately.
Why use it
- Several percentage modes covered in one place.
- Clear results you can copy straight into a document.
- No spreadsheet needed for quick everyday math.
Common use cases
- Calculate a discount or sale price.
- Find the percentage change between two figures.
- Split a tip or work out tax on an amount.
Tips
- A rise then an equal-percent fall does not return to the start — percentages are not symmetric.
- Double-check which number is the base of the percentage.
How to use
- Enter values.
- Calculate.
FAQ
- What calculations can it do?
- Percent of a number, percentage change, and what percent one number is of another.
- Is my data sent anywhere?
- No. Calculations run instantly in your browser.
- Can it work out a discount?
- Yes, find the saved amount and the final price after a percentage off.
- How do I calculate percentage increase?
- Enter the old and new values to get the percentage change between them.
- Does it handle decimals?
- Yes, decimal inputs and results are supported.
- Is it good for tips or tax?
- Yes, add a percentage to a base amount for tips, tax or markups.