Free · Math · Fractions & Percentages

Percent Error Calculator

Compare an observed value with an accepted value and calculate absolute and signed percent error.

  • Calculation method included
  • Private in your browser
  • No signup
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Calculator inputs

Enter your values

Result

Your calculation

Percent error
5%
Signed error
-5%
Absolute difference
0.5

How to use this calculator

  1. Enter the known values using the units shown.
  2. Choose the calculation you want when more than one method is available.
  3. Calculate, then review the result and the worked formula together.

Private by default

Inputs and results stay in this browser tab. Bookify does not upload or store the values you enter.

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