The Percentage Error Calculator tool enables you to calculate the percentage error percentage error
between an approximate value (or experimental measured value) and a theoretical actual value.

#### The Percent Error Formula

You can use the percent error equation to find the percentage error of two value:
Percentage Error

=
Approximate Value - Actual Value
Actual Value

× 100
Example: We project 100 people will attend the seminar. However, only 80 people has attended the seminar. What is the percentage error ?

Percentage Error

=
100 - 80
80

× 100
Anwser: 25%

To know how to calculate percent error between two numbers? Please use our percentage error calculator.

#### References

More references for*Percentage Error Definition*