Percent Error Calculator

Compare a measured value with a nonzero accepted value.

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What is this calculator?

Compare a measured value with a nonzero accepted value.

What can you use it for?

Use it when solving an exercise, checking a result, or working with the particular quantities shown in this form. Compare a measured value with a nonzero accepted value.

How to use it

  1. Enter measured value.
  2. Enter accepted value.
  3. Select Calculate (or Generate for random tools).
  4. Read the answer and any additional results below the form. Check the units and the limits of the method.

Formula and method

Result = abs(measured value-accepted value)/abs(accepted value) × 100

The formula uses the units and definitions shown above. Each input is substituted before the arithmetic is evaluated; the calculated output is rounded for display.

Worked example

Measured value: 98, Accepted value: 100. The result is 2 % (result).

Assumptions and limits

Inputs and outputs must stay within the supported finite number range. Displayed decimal answers may be rounded.

Frequently asked questions

What inputs does the Percent Error Calculator need?

Use measured value, accepted value. Read the answer and any additional results below the form. Check the units and the limits of the method.

What assumptions apply to the Percent Error Calculator?

Inputs and outputs must stay within the supported finite number range. Displayed decimal answers may be rounded.

A little help with the numbers

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