OSHA DART Rate Calculator
Calculate your Days Away, Restricted, or Transferred (DART) rate for safety compliance.
Number of cases involving days away from work, restricted work activity, or job transfers.
Total hours worked by all employees during the calendar year.
Your DART Rate
0.00
Please enter valid numbers for both fields. Total hours must be greater than zero.
What is a DART Rate?
The DART Rate (Days Away, Restricted, or Transferred) is a critical safety metric defined by the Occupational Safety and Health Administration (OSHA). It helps organizations measure the number of recordable workplace injuries and illnesses that resulted in an employee missing work, being restricted in their daily duties, or being transferred to a different role due to the injury.
Unlike the TRIR (Total Recordable Incident Rate), which counts all recordable incidents, the DART rate specifically focuses on the more severe incidents that impact an employee's ability to perform their regular job functions.
The DART Rate Formula
To calculate the DART rate manually, you use the standard formula provided by the Bureau of Labor Statistics (BLS):
DART Rate = (N × 200,000) / EH
Where:
- N = Number of DART incidents (recordable injuries/illnesses resulting in Days Away, Restricted work activity, or Job Transfer).
- EH = Total hours worked by all employees during the calendar year.
- 200,000 = A benchmark constant representing 100 full-time employees working 40 hours per week for 50 weeks per year.
How to Use This DART Rate Calculator
- Count your DART Incidents: Review your OSHA 300 Log. Count the number of cases checked in columns H (Days away from work) and I (Job transfer or restriction). Sum these two numbers to get your total DART incidents.
- Determine Total Hours: Input the total number of hours worked by all employees (including full-time, part-time, and seasonal) during the specific reporting period (usually one year). Do not include vacation, sick leave, or holidays.
- Calculate: Click the button to generate your rate.
Why is DART Rate Important?
Your DART rate is a key performance indicator (KPI) for workplace safety. It is often used by:
- OSHA: To target high-risk industries for inspections.
- Insurance Companies: To determine workers' compensation premiums. A lower rate often results in lower premiums.
- Clients and Partners: During pre-qualification processes for contracts. Many general contractors require subcontractors to maintain a DART rate below the industry average.
DART vs. TRIR
While both metrics are essential, they tell different stories:
- TRIR (Total Recordable Incident Rate): Calculates the rate of all recordable incidents, regardless of severity.
- DART: Calculates only the incidents that were severe enough to change an employee's work status.
A DART rate that is very close to your TRIR suggests that most of your injuries are severe, whereas a wide gap between the two suggests you have many minor injuries but fewer severe ones.