Percent error calculator
Percent error compares what you measured against what is true, relative to the true value.
Percent error
0.577 669 23%
- Signed percent error Negative means the measurement was low.
- -0.577 669 23 %
- Absolute error
- 0.056 65
- Relative error
- 0.005 776 692 3
Show the working
- Measured value = 9.75
- True value = 9.806 65
- error = 9.75 - 9.806 65 = -0.056 65
- Absolute error = abs(-0.056 65) = 0.056 65
- Percent error = 9.806 65 != 0 ? 0.056 65 / abs(9.806 65) * 100 : 0 = 0.577 669
- Signed percent error = 9.806 65 != 0 ? -0.056 65 / abs(9.806 65) * 100 : 0 = -0.577 669
- Relative error = 9.806 65 != 0 ? 0.056 65 / abs(9.806 65) : 0 = 0.005 776 69
Values are shown to six significant figures here; the arithmetic itself runs on exact fractions and is only rounded where a number is printed.
Scenarios & local history
Compare a saved scenario
Recent calculations
The formula
- percent error = |measured - true| / |true| x 100