SPONSORED

Percentage Error Calculator

Percentage Error Calculator

How to Calculate Percentage Error

Percentage error is found by dividing the error amount by the original estimate, then multiplying that result by 100%.
\text{Percent Error} = \frac{\text{Error}}{\text{Estimated Value}} \times 100\%
It should be noted that the percent error is measured FROM the first value – an error of 25 from an estimate of 50 25 is 50%, while if that error was looked at from the perspective of the actual amount (75) it would be a difference percentage change (an error of 25 from a result of 75 is a difference of 33.3%).

Example

Error of 25 from an estimate of 50:
\frac{25}{50} \times 100\% = 0.5 \times 100\% = 50%
Error of 25 from an estimate of 75:
\frac{25}{75} \times 100\% = 0.333 \times 100\% = 33.3%
Error of 0.0001 from an estimate of 0.0443
\frac{0.0001}{0.0443} \times 100\% = 0.002257\times 100\% = 0.2257%

What is a percentage?

A percentage is a number expressed as a fraction of 100.
If a number is 100% (100 percent), then it is a “whole” – the same as one.
If a number is 50%, then it is a half – the same as 0.5 or 1/2.
If a number is 400%, then it is 4 times, the same as 4.

More Percentage Calculators

More Math Calculators