DART Rate Calculation

You can use the DART rate formula below to measure workplace injuries severe enough to warrant Days Away from work, job Restrictions, and/or job Transfers.

To determine the DART Rate, count the number of line entries on your OSHA Form 300 that received a check mark in columns (H) and (I), or refer to the entry in columns (H) and (I) on the OSHA Form 300A.

DART Rate Calculation:

The DART Rate is determined using the following formula:

DART = N/EH × 200,000*

N = Total number of injuries and illnesses with Days Away From Work + total number of injuries and illnesses resulting in days with Restricted Work

EH = Total number of hours worked by all employees, including management, temporary, and leased workers.

* Base for 100 full-time equivalent workers

For example, if you have 50 employees who work a total of 100,000 hours during the year and have experienced 10 recordable injuries, the DART rate would be (10 ÷ 100,000) x 200,000 = 20.

Please note that this tool only works with numeric input.

N /EH * 200,000 = DART

The number of employees doesn't matter. The total number of injuries and the total number of hours the employees work during the year are the two important figures entered into the formula.

If you require assistance with regard to this or any other environmental/safety issue, please contact Gary Jones by clicking here or at 800-910-4283, ext. 794.

Published on Thursday, May 6, 2010 (updated 06/02/2016)

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