OSHA DART Incident Rate Calculator
Calculate your company's Days Away, Restricted, or Transferred (DART) rate to monitor workplace safety performance.
Your DART Rate: 0.00
What is the OSHA DART Rate?
The DART (Days Away, Restricted, or Transferred) rate is a mathematical safety metric used by OSHA (Occupational Safety and Health Administration) to track how many workplace injuries or illnesses resulted in employees missing work, performing restricted duties, or being transferred to another job function. Unlike the TRIR (Total Recordable Incident Rate), the DART rate focuses specifically on more severe incidents that impact an employee's ability to perform their standard job duties.
How to Calculate DART Rate
The DART rate is calculated using a standard formula that represents the number of incidents per 100 full-time employees over a one-year period. The formula is:
(Total Number of DART Incidents × 200,000) / Total Number of Hours Worked
Where:
- DART Incidents: The sum of cases in Column H (Days away from work) and Column I (Job transfer or restriction) on the OSHA Form 300.
- 200,000: This represents the total hours 100 employees work in a year (100 employees × 40 hours per week × 50 weeks per year).
- Total Hours: The actual total number of hours worked by all employees (including overtime and temporary staff) during the period being measured.
Example DART Calculation
Let's say a manufacturing company had the following data for the year:
| Metric | Value |
|---|---|
| Cases with Days Away (Col H) | 3 |
| Cases with Restriction/Transfer (Col I) | 2 |
| Total Employee Hours Worked | 450,000 |
Calculation:
Total DART Incidents = 3 + 2 = 5
DART Rate = (5 × 200,000) / 450,000
DART Rate = 1,000,000 / 450,000 = 2.22
Why Monitoring Your DART Rate Matters
Tracking your DART rate is critical for several reasons:
- OSHA Inspections: OSHA uses DART rates to identify high-risk industries and workplaces for programmed inspections. High rates can trigger increased scrutiny.
- Safety Benchmarking: Comparing your DART rate against industry averages (published by the Bureau of Labor Statistics) helps you understand your safety performance relative to competitors.
- Insurance Costs: High incident rates often lead to higher workers' compensation premiums.
- Identifying Trends: A rising DART rate indicates that injuries are becoming more severe, signaling a need for immediate intervention in your safety protocols.