Percent Error Calculator
Calculate the percent error between actual and experimental values
Percent Error Calculator
Percent Error = |Experimental - Actual| / |Actual| × 100%
Enter values to see the calculation
About Percent Error
Percent error measures how accurate a measured or experimental value is compared to the actual or theoretical value. It’s expressed as a percentage that indicates how close your measurement is to the true value.
•Formula
Percent Error = |Experimental Value − Actual Value| ÷ |Actual Value| × 100%
•Types of Error
- –Absolute Error: The absolute difference between measured and actual values.
- –Relative Error: The absolute error divided by the actual value.
- –Percent Error: The relative error expressed as a percentage.
•Accuracy Guidelines
- –Excellent (0–5%): Very high accuracy.
- –Good (5–10%): Acceptable accuracy for most applications.
- –Moderate (10–20%): May need improvement.
- –Poor (>20%): Significant error, review methodology.
•Common Applications
- –Laboratory experiments and measurements.
- –Quality control and manufacturing.
- –Scientific research validation.
- –Engineering calculations.
- –Calibration of instruments.
- –Academic assessments.
•Sources of Error
- –Systematic Error: Consistent bias in measurements.
- –Random Error: Unpredictable variations.
- –Human Error: Mistakes in reading or recording data.
- –Instrumental Error: Limitations of measuring devices.
- –Environmental Error: External factors affecting measurements.
•Tips for Reducing Error
- –Use calibrated, high-precision instruments.
- –Take multiple measurements and average them.
- –Control environmental conditions.
- –Follow proper measurement techniques.
- –Regular instrument maintenance and calibration.