TRIR & DART Rate Calculator
Calculate your OSHA Total Recordable Incident Rate (TRIR), DART rate, and lost-time rate from hours worked and recordable cases — the leading safety metrics GCs and insurers ask for.
Enter your total hours worked and recordable cases to see your TRIR, DART, and lost-time rates.
Want this done for you, across every job?
This computes one number, once, from numbers you typed in. Jobsite keeps your TRIR and DART current — every recordable counted from your real incident log, divided by the hours worked you certify on your OSHA 300A — beside a verified Safety Index built from your certs and inspections, and benchmarks you against an anonymized cohort, so the number is always current and defensible when a GC or insurer asks.
Frequently asked questions
How is TRIR calculated?
TRIR = (number of OSHA-recordable cases × 200,000) ÷ total hours worked by all employees in the period. The 200,000 constant represents 100 full-time workers working 2,000 hours a year, so the rate reads as recordable cases per 100 full-time workers per year.
What is the difference between TRIR and DART?
TRIR counts all OSHA-recordable cases. DART (Days Away, Restricted, or Transferred) counts only the more serious recordables that resulted in days away from work, restricted duty, or job transfer. DART is always less than or equal to TRIR, and uses the same 200,000-hour formula.
Can I calculate my EMR with this tool?
No — and no tool can. Your Experience Modification Rate (EMR) is set by your workers'-comp rating bureau (NCCI or your state bureau) from your actual losses versus expected losses over a three-year window. It is not a formula you compute yourself. TRIR and DART, by contrast, are calculated directly from your own OSHA 300 log, which is what this tool does.
What is a good TRIR in construction?
Lower is better, and the right benchmark is your own trade. Recent BLS data has put the construction industry average around 2.4–3.0 recordable cases per 100 full-time workers; many GCs and owners want to see prequalified subs below their NAICS-code average. Compare your rate to the published BLS rate for your specific construction NAICS code rather than to a single national number.
Read the full guide: OSHA Compliance: the complete guide →