DART Incident Rate Calculator
Total cases involving Days Away, Restricted work, or job Transfer.
Total hours worked by ALL employees during the same period.
Your DART Incident Rate:
Understanding the DART Incident Rate
The DART Incident Rate is a safety metric used by OSHA (Occupational Safety and Health Administration) to track how many workplace injuries and illnesses resulted in employees spending time away from work, restricted duty, or being transferred to another job.
Unlike the Total Recordable Incident Rate (TRIR), which counts every recordable injury, DART focuses specifically on the more severe incidents that impact an employee's ability to perform their standard job duties.
The DART Rate Formula
To calculate the DART rate manually, use the following OSHA-standardized formula:
Why 200,000? This number represents the equivalent of 100 employees working 40 hours per week, 50 weeks per year. It provides a standardized base so that small and large companies can be compared fairly.
Example Calculation
Suppose a manufacturing plant had 4 incidents that resulted in days away or job transfers last year. During that same period, the total hours worked by all employees combined was 180,000 hours.
- DART Cases: 4
- Total Hours: 180,000
- Calculation: (4 × 200,000) / 180,000 = 4.44
The DART Incident Rate for this facility would be 4.44. This means for every 100 full-time workers, 4.44 experienced an injury or illness serious enough to require time off, restriction, or transfer.
What counts as a DART case?
A DART case must be a recordable injury or illness that results in:
- Days Away from work (beyond the day of injury).
- Job Restriction (employee cannot perform all routine job functions).
- Job Transfer (employee is moved to a different task due to injury).