Enter the number of injuries or illnesses that result in days away, restricted, or transferred and the hours worked to determine the DART rate.

DART Rate Formula

The following formula is used to calculate a DART rate: 

DR = RIdart *200,000 / EHW
  • Where DR is the dart rate
  • RIdart is the number of recorded injuries or illnesses that resulted in Days Away, Restricted, or Transferred
  • EHW is the total number of employee hours worked.

To calculate the DART rate, divide the number of recorded injuries or illnesses that resulted in time off by the number of hours worked, then multiply by 200,000.

DART Rate Definition

What is a dart rate?

DART stands for days away, restricted, or transferred. A DART rate is the rate at which injuries occur that result in any one of those in DART.

In other words, the DART incidences per employee hours worked.

Example Problem

How to calculate DART Rate?

  1. First, determine the number of injuries that resulted in days away, restricted, or transferred.

    For this example problem, the total number of injuries that occurred that resulted in DART was 200.

  2. Next, determine the number of employee hours worked.

    For this example problem, there were a total of 300,000 employee hours worked.

  3. Finally, calculate the DART rate.

    Using the formula above, the dart rate is calculated to be:
    DR = RIdart *200,000 / EHW
    DR = 200 *200,000 / 300,000
    DR = 133.33 injuries per 200,000 hours