수학

Percent Error Calculator

Calculate the percentage of error between an observed value and the true expected value.

The value you measured or estimated

The exact, accepted, or theoretical value

Percent Error
—%
Absolute Error
—
The raw difference
Relative Error
—
As a decimal
사용 방법
  1. Enter your Observed Value (the result of your measurement or experiment).
  2. Enter the Expected Value (the true, theoretical, or accepted value).
  3. The calculator determines how far off your measurement is as a percentage.

공식

Absolute Error: |Observed − Expected|

Percent Error: (|Observed − Expected| / |Expected|) × 100%

Percent Error is a mathematical concept used heavily in chemistry and physics to report the difference between a measured (experimental) value and a true (theoretical) value. A percent error close to zero indicates highly accurate measurements.