Percentage Error Calculator

Error calculator is a must-have task in the field of Science especially when it comes to experimental calculations. But this calculation is not done in the form of simple integers but it is done in the form of percentage. It means that the error is calculated in percentage format to make it more clear and precise.

Don’t you know how to do this calculation? Are you looking for assistance to find errors in your work and completing your assignment? You should use this percentage error calculator which has been designed just for students like you. This maths calculator has a specific algorithm according to which it will find the percentage error using your input values.

What is Percentage Error?

The percentage error is the calculation of error in percentage format instead of integer calculation. This calculation is normally done in experimental projects to check how much the calculated values have deviated from the original value.

It means that this error shows how far your results have been spotted from the standard ones. You can calculate the percentage error if you have the standard values and results obtained from your work. In the following section, we will show how you can do this using a specific formula.

What is the Percentage Error Formula?

The formula for the calculation of percentage error is pretty simple. You can easily understand and use it to find this measurement. Here is the formula you have to follow:

Percentage Error = Standard Value - Observed Value/Standard Value × 100%	

In this formula, “Standard Value” represents the original or true value of the measurement while “Observed Valuebelongs to your obtained results.

How to Calculate the Percentage Error?

As you can see, the formula for percentage error is simple and easy to understand. You can easily put the values in this formula to find the error. If you are still confused, you can get guidance from the following solved example.

Example 1:

Find the percentage error if the standard value is 120 while the observed value is 89.


We need to put the given values in the following formula.

Percentage Error = Standard Value - Observed Value/Standard Value × 100%	

By putting the values,

Percentage Error = 120- 89/120 × 100%	
= 31/120 × 100%	 
Percentage Error = 25.83%	 

How to use the Percentage Error Calculator?

If you are feeling it difficult to find the percentage error, you should use this tool designed by Calculator’s Bag. This tool has a simple working method that you can complete with the following steps.

  • Insert the standard/true value in the first input box.
  • Insert the observed value in the second input box.
  • This calculator will instantly find the percentage error and show it on the screen.

FAQ | Percentage Error Calculator

What is the percentage error in 9.89 g?

To find the percentage error, we have the standard value. On the other side, we can find the relative error for this value which comes out to be 0.1%.

What is a percentage error example?

Being a student, you must have the expected numbers to pass your exams. The expected marks and obtained marks can be expressed in terms of percentage error as it also shows how your results are deviating from the true/expected/standard values.

What is the percent error in accuracy?

Percentage error shows exactly how far the obtained results are from the standard ones.

What does a 100% percent error mean?

It means that the calculations are 100% wrong and deviate from the true values.

Can percentage error be negative?

Yes, it can be negative but normally we consider it as positive because the more chances of acceptance of results are when the percentage error is positive.