🛡️ DART Rate Calculator
Measure OSHA DART performance using incident counts and total hours worked.
How to Use This Calculator
Count DART Incidents
Use OSHA 300 logs to total cases with days away, restricted duty, or job transfers.
Total the Labor Hours
Sum all hours worked by employees and supervised contractors for the same period.
Run the Calculation
Click calculate to compute the DART rate normalized to 200,000 hours (100 workers Ă— 40 hours Ă— 50 weeks).
Benchmark Performance
Compare your DART rate against industry averages published annually by OSHA/BLS.
Formula
DART Rate = (Number of DART Cases Ă— 200,000) Ă· Total Hours Worked
• 200,000 represents 100 workers × 40 hours per week × 50 weeks per year.
• Include both full-time and part-time labor hours.
• DART cases include days away, restricted duty, or job transfer incidents.
OSHA also tracks Total Recordable Incident Rate (TRIR), which uses the same multiplier but with all recordable cases. The DART rate focuses on more severe incidents that impact productivity.
Full Description
The DART rate (Days Away, Restricted, or Transferred) is a safety performance metric defined by OSHA that tracks serious workplace injuries. It normalizes incident counts based on hours worked so organizations of different sizes can be compared objectively.
A lower DART rate indicates a safer work environment and fewer disruptions to operations. Environmental health and safety (EHS) leaders use DART as a leading indicator to guide resource allocation, set safety goals, and demonstrate regulatory compliance.
Use Cases
- Annual OSHA and Bureau of Labor Statistics reporting
- Executive dashboards for manufacturing, construction, or logistics firms
- Monitoring the impact of safety training and hazard mitigation programs
- Evaluating subcontractor safety performance in project bidding
Maintaining a DART rate below industry benchmarks can reduce workers’ compensation costs, bolster brand reputation, and improve employee morale.
Frequently Asked Questions
Where can I find industry benchmarks?
OSHA and the U.S. Bureau of Labor Statistics publish annual injury and illness data tables listing average DART rates by NAICS industry code. Use those figures to benchmark your performance.
Should I include contractor hours?
Yes—include hours for supervised contractors whose work is overseen by your organization. Exclude independent contractors who control their own worksite safety programs.
How does DART differ from TRIR?
TRIR includes all OSHA-recordables, while DART includes only cases with days away, restricted duty, or job transfers. DART is typically lower and focuses on the most disruptive incidents.
Can I calculate monthly or quarterly rates?
Yes. Use the same formula with period-specific hours and multiply cases by 200,000. Just ensure the period for hours and incidents matches exactly.