Enter the total number of words read and the total number of errors made into the calculator to determine the error rate in scoring and analyzing a running record.

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## Error Rate Formula

The following formula is used to calculate an error rate.

ER = TW / TE

- Where ER is the error rate
- TW is the total words
- TE is the total errors

## Error Rate Definition

**What is an error rate? **An error rate, in the context of reading, is a ratio of the total words read to the total errors made while reading. This is used when scoring and analyzing a running record of an individual.

## Example Problem

How to calculate error rate?

**Frist, determine the number of words read.**For this example, the student read 500 words.

**Next, determine the number of errors.**While reading, their were 50 recorded errors.

**Finally, calculate the error rate.**Using the formula above, the error rate is found to be 500/50 = 10:1.

## About Error Rate?

**What is the error rate used for? **An error rate, in this case, is a measure of the rate of errors of a student while learning. This rate is used to assess the learning or educational level of a student when conducting a running record.

**What is a running record? **A running record is a reading assessment tool used by teachers to analyze how students or readers are performing at reading. This is a type of fluency assessment since the reader must be reading aloud.

**When to use running records? **Running records are typically used for young students that are still learning how to speak a language properly to determine their fluency with said language.