Calculate reading accuracy rate from total words read and errors, or find the missing value plus correct words, error rate, and reading level.

Reading Accuracy Rate Calculator

Enter any two values to calculate the third. This calculator also shows correct words read, error rate, and a reading level classification.

Reading Accuracy Rate Formula

The following two example problems outline the steps and information needed to calculate the Reading Accuracy Rate.

RAR = (WR-E) / WR * 100
  • Where RAR is the Reading Accuracy Rate (%)
  • WR is the total number of words read 
  • E is the total number of errors 

To calculate a reading accuracy rate, subtract the number of errors from the number of words read, divide by the number of words read, then multiply by 100.

How to Calculate Reading Accuracy Rate?

The following example problems outline how to calculate Reading Accuracy Rate.

Example Problem #1:

  1. First, determine the total number of words read.
    • The total number of words read is given as: 5,000.
  2. Next, determine the total number of errors.
    • The total number of errors is provided as: 1,000.
  3. Finally, calculate the Reading Accuracy Rate using the equation above: 

RAR = (WR-E) / WR * 100

The values provided above are inserted into the equation below and computed.

RAR = (5000-1000) / 5000 * 100 = 80.00 (%)

Example Problem #2: 

For this problem, the variables required are provided below:

total number of words read = 600

total number of errors = 100

Test your knowledge using the equation and check your answer with the calculator.

RAR = (WR-E) / WR * 100 = ?