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Use our free percentage error calculator to compute percentage error (|approx − exact| / |exact| × 100%) and percentage difference between two values. Shows absolute error, relative error, accuracy, direction (overestimated/underestimated), and percentage change.
Compute percentage error and percentage difference. Percentage error measures how far an approximate value is from the exact value. Percentage difference measures the relative difference between two values regardless of which is considered correct.
Error = |approx−exact|/|exact| × 100%. Diff = |v1−v2|/avg × 100%Percentage: The percentage value you want to apply
Number: The original number or value
Result: The calculated result
Result: 5
Result: 22.22
CalculateMe Team
Last updated: 2026-07-15