Percentage difference calculator
Compare two values without picking a starting point.
Percentage difference treats both values equally. Percentage change uses an original value as its denominator. Use the separate Percentage change tool for growth or decline over time. Two zero values return 0%. Change the input or settings to update your result. Results update as you type. Up to 1,000,000 characters.
Your result
How to use Percentage difference calculator
- Enter the values you want to calculate and choose the relevant units or settings.
- The result updates as you type. Adjust the available settings if needed.
- Review the result, then use Copy result or a download link when available.
Useful next steps
How to use it
Enter two nonnegative values. The percentage difference is their absolute difference divided by their average, multiplied by 100.
A worked example
For 100 and 120, the difference is 20 and the average is 110. The percentage difference is 18.1818%. Swapping the two values gives the same answer.
What to know
Percentage difference treats both values equally. Percentage change uses an original value as its denominator. Use the separate Percentage change tool for growth or decline over time. Two zero values return 0%.