Percentage Difference Calculator
A free, browser-based calculator. Runs entirely in your browser — no sign up, nothing stored.
100% FreeRuns in your browserBasic
Enter Values
Enter your values and press Calculate to see results.
How to use this calculator
- Enter the two values.
- Press Calculate.
How it works
Percentage difference = |a − b| ÷ the average of a and b × 100 — a symmetric comparison.
Worked example
80 and 100. ≈ 22.2%.
Related tools
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.