Percent Error Calculator

Enter value and click on calculate. Result will be displayed.
Approximated/measured value :
Exact/actual value :
Result:
Percent error :
Percent error non absolute :
Absolute error :

What is a Percent Error Calculator?

A Percent Error Calculator is a tool used to determine the percentage difference between an observed (measured) value and an actual (true) value. It helps assess accuracy in experiments, finance, and engineering.

Why Use a Percent Error Calculator?

  • To evaluate measurement accuracy in scientific experiments.
  • To compare theoretical vs. actual values in finance, physics, or chemistry.
  • To identify errors in calculations or predictions.

How to Calculate Percent Error?

The formula is:

  1. Find the difference between measured and actual values.
  2. Divide by the actual value to get relative error.
  3. Multiply by 100 to express it as a percentage.

When to Use It?

  • In scientific experiments (e.g., physics, chemistry).
  • In business & finance (e.g., profit predictions vs. actual).
  • In engineering (e.g., manufacturing tolerances).