Percentage difference measures the relative difference between two values without direction. The formula is:
% Difference = |V1 - V2| / ((V1 + V2) / 2) Γ 100%
Unlike percent change, percent difference uses the average as the reference, making it symmetric and order-independent.
When both values are equal, the difference is 0%. It approaches 200% as one value approaches 0.
Yes. Percentage difference is commonly used in scientific experiments, quality control, and data validation to compare measurements.
Yes. Negative numbers are supported. The absolute difference ensures the result is always non-negative. For example, -10 and 10 have a 200% difference.
When both values are zero, the average is zero and percentage difference cannot be computed. The tool will show an error message.
Yes. After the page loads, all calculations work offline since everything runs locally in your browser.