How to use this percent difference calculator
Enter the values requested above and select Calculate. Change any input to compare another scenario. The calculation runs locally in your browser and does not require an account.
Formula and method
Example
For 80 and 100, the absolute difference is 20 and the percent difference is about 22.22%.
Tips for a useful result
Use percent change instead when one value is specifically the starting or original value.
What this calculator is useful for
Calculate symmetric percent difference between two values without treating either one as the original value. The result is intended for quick estimates, checking arithmetic and comparing scenarios. When a result affects a contract, tax filing, medical decision, building-code requirement or other high-stakes situation, verify the result with the appropriate professional or authoritative source.
Frequently asked questions
What does the Percent Difference Calculator calculate?
Calculate symmetric percent difference between two values without treating either one as the original value.
How does the Percent Difference Calculator work?
Percent difference = |A − B| ÷ ((|A| + |B|) ÷ 2) × 100%.
Is the Percent Difference Calculator free to use?
Yes. ERICH Calculators is free to use and does not require an account.