Percent Error Calculator

Enter the value that you want to calculate percent error..

Approximated/measured value:
Exact/actual value: 
Percent error:
Percent error non absolute:
Absolute error:

Percent Error Calculator

Understanding Percent Error

Percent error measures the accuracy of a measurement compared to a true or accepted value.

Key Formula

\[ \text{Percent Error} = \left( \frac{\text{True Value} - \text{Measured Value}}{\text{True Value}} \right) \times 100\% \]

How to Use the Percent Error Calculator

Input the measured and true values to calculate the percent error automatically.


Used in scientific research, quality control, and education.

Frequently Asked Questions

  1. How Do You Calculate Percent Error?

    Subtract the measured value from the true value, divide by the true value, multiply by 100.

  2. What is a Percentage Error Calculator?

    A tool that calculates the difference between a measured and a true value in percentage.

  3. What is a 1% Percent Error?

    Indicates the measured value is within 1% of the true value.

  4. How Do You Calculate Error Rate?

    Calculate the number of errors divided by the total number of opportunities for error.

  5. What is the Percent Error?

    A measure of how far an experimental value is from a known or true value, expressed as a percentage.

  6. Percent Error and Example?

    Percent Error = \(\left( \frac{\text{True Value} - \text{Measured Value}}{\text{True Value}} \right) \times 100\%\). For a measured value of 50 and a true value of 52, the percent error is 3.85%.

  7. How to Calculate Percentage?

    Divide the part by the whole and multiply by 100 to get a percentage.

  8. What is the Best Percentage Error?

    The lower the percentage error, the better. Ideally, it should be as close to 0% as possible.

  9. How to Calculate Uncertainty?

    Uncertainty is typically calculated by combining standard deviations or errors of different measurements.

  10. Is a 2% Percent Error Good?

    Yes, a 2% error is generally considered good, indicating high accuracy.

  11. Is a 10% Percent Error Bad?

    Depending on the context, a 10% error might be considered high, especially in precise scientific measurements.

  12. Is 1 Percent Error Good?

    Yes, 1% error suggests high accuracy in the measurement.

  13. What is Error Formula?

    The error formula is the difference between the measured value and the true value.

  14. Can Percent Error be Negative?

    Yes, percent error can be negative if the measured value is less than the true value.

  15. What is Error Ratio?

    Error ratio refers to the ratio of the error value to the true value.