Calculator
Result
Answer will appear hereEnter the values above and press Calculate to see the answer, step-by-step solution, and formula used.
How the result is calculated
Percentage error = |Experimental − Theoretical| / |Theoretical| × 100
Percentage Error Calculator
Find absolute percentage error between a measured result and a known or theoretical value.
Explanation
What this calculator does
Percentage Error Calculator helps you calculate the result using clear inputs, a formula, and practical examples.
How LearnLinx Calculates This Result
Formula
Percentage error = |Experimental − Theoretical| / |Theoretical| × 100
Enter your values and press Calculate to see each computation step with your numbers plugged into this formula.
Example
If the measured value is 9.8 and the true value is 10, the percentage error is 2%.
When to use it
Use it when you need a quick result for study, planning, documentation, or checking a manual calculation.
Common mistakes
- Swapping experimental and theoretical values.
- Using a theoretical value of zero.
- Reporting a signed difference when absolute percent error was required.
Frequently asked questions
Is the sign kept?
No—absolute percentage error drops the sign. The steps still show the raw difference.
What if the true value is zero?
Division by zero is undefined; enter a non-zero theoretical value.
What formula does the Percentage Error Calculator use?
It uses: Percentage error = |Experimental − Theoretical| / |Theoretical| × 100. The result page also shows a step-by-step breakdown of how your answer was calculated.
Is the Percentage Error Calculator free to use?
Yes. All LearnLinx calculators are completely free with no signup required. Signing in is optional and only adds a 60-day history of your calculations.