Percentage Difference Calculator
Percent difference between two values, regardless of order.
How it works
Percentage difference = |a − b| ÷ ((a + b) ÷ 2) × 100. Unlike percentage change, it treats both values equally. Use percentage change when one value is clearly the starting point.
FAQ
Is this calculator free?
Yes. No signup is needed and nothing you enter is stored.
Is the result exact?
Results are rounded for display. For financial, medical, or legal decisions, confirm with a professional.
Do my numbers leave my device?
No. The calculation runs in your browser.