Percent Error Calculator

Calculate percent error — how far an experimental or measured value falls from the true (theoretical) value, as a percentage. A staple of physics and chemistry lab work.

Inputs

Experimental (measured) value

Theoretical (true) value

Tab to move between fields

Results

Percent error

Absolute error2

How to Use This Calculator

Enter your experimental or measured value.
Enter the theoretical or accepted true value.
Percent error is the absolute difference divided by the true value, times 100.

Ad Placeholder

Related Calculators

Percentage Calculator

Calculate percentages easily — find a percentage of a number, percentage increase/decrease, and percentage change between two values.

Percentage Change Calculator

Calculate the percentage change between two values. See absolute change and percentage increase or decrease.

Standard Deviation Calculator

Calculate the mean, median, standard deviation, and variance for a set of numbers. Supports both population and sample calculations.

Ad Placeholder