Percent Error Calculator
Percent error is absolute difference divided by the exact value, multiplied by 100.
This calculator is free to use. Enable JavaScript to enter your values and see a result instantly.
How it works
Percent error is absolute difference divided by the exact value, multiplied by 100.
Worked example
An observed value of 95 compared with 100 has a 5% error.
Keep in mind
Results are estimates; check the assumptions for your situation.