±% Percent Error Calculator
How It Works
Calculate percentage error between an experimental value and an accepted value. Use Percent Error Calculator to apply the displayed mathematical method to your values and see the result immediately.
The result is most useful when the inputs match the definitions used by this calculator. For this tool, the underlying method is: Percent Error = |Experimental − Accepted| / |Accepted| × 100. Compare the output with the worked example, then change one meaningful input at a time to see how the result responds.
Understanding Percent Error
Percent Error describes a mathematical relationship between the values entered in the calculator. Understanding the reference values and formula helps you interpret the result correctly. Check units, signs, reference values, and rounding conventions when using the result for an important calculation. Review the percent error inputs and units before relying on the result.
When to Use This Calculator
Use Percent Error Calculator to apply the displayed mathematical method to your values and see the result immediately.
Practical tip: For this Percent Error Calculator, identify the reference values and units first, then change one meaningful input at a time so the effect on the result is clear.
Formula
Percent Error = |Experimental − Accepted| / |Accepted| × 100
Example
Experimental 98 vs accepted 100 gives 2% error.