Percent Error Calculator
Percent Error = |(Observed – True) / True| × 100%
Use this tool to measure accuracy between measured and expected values. Add negative sign option for direction.
Use this tool to measure accuracy between measured and expected values. Add negative sign option for direction.
Free Percent Error Calculator – Calculate Percentage Error Online
What is Percent Error?
Percent error measures the accuracy of a measurement by comparing the experimental value to the accepted or theoretical value. It’s expressed as a percentage and helps determine how close your results are to the expected value.
How to Use This Calculator
- Enter your Experimental Value (observed result)
- Enter your Theoretical Value (expected/accepted value)
- Click “Calculate”
- Get instant percent error result
Example Calculations
- Experimental Value: 9.5
- Theoretical Value: 10.0
- Percent Error = |9.5 – 10.0| / 10.0 × 100% = 5%
Q: How accurate is this percent error calculator?
A: Our percentage error calculator uses the standard formula…
Q: Can I calculate percent error for any experiment?
A: Yes, this experimental error calculator works for all types…