How to Calculate Percentage Error
What is Percentage Error?
Calculates percentage error between theoretical/expected values and actual measured values in experiments.
Formula
Percentage Error = |Theoretical - Actual| / Theoretical * 100
Step-by-Step Guide
- 1Enter the theoretical or expected value
- 2Input the actual measured or observed value
- 3Calculate percentage deviation
Worked Examples
Input
Expected 10, measured 9.5
Result
5% error
Experimental accuracy assessment
Common Mistakes to Avoid
- ✕Using actual instead of theoretical as denominator
- ✕Forgetting absolute value
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