Free OSHA Incident Rate Calculator
Calculate your TRIR, DART, and days-away rate instantly, benchmark against your industry, and export a clean PDF report — free, no account required.
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Only actual hours worked — exclude vacation, holiday, and leave.
Your rates
Enter your total hours worked to see your rates.
What is TRIR, DART, and the Days-Away Rate?
TRIR (Total Recordable Incident Rate) counts every OSHA-recordable injury or illness at your company — including cases that only required medical treatment beyond first aid — normalized so companies of any size can be compared.
DART (Days Away, Restricted, or Transferred) is a subset of TRIR: only cases that led to days away from work, job restriction, or job transfer. It's the rate OSHA's Site-Specific Targeting program uses to flag sites for inspection.
Days-Away (Lost-Time) Rate is the narrowest cut — only cases with actual days away from work.
The formulas
All three rates use the same normalization factor — 200,000 — which represents 100 full-time employees × 40 hours/week × 50 weeks/year:
TRIR = (recordable cases × 200,000) / hours worked DART = (DART cases × 200,000) / hours worked Days-Away Rate = (days-away cases × 200,000) / hours worked
Total hours worked should only include actual hours on the job — exclude vacation, holiday, and other leave time.
What counts as an OSHA-recordable incident?
Under 29 CFR 1904, a work-related injury or illness is generally recordable if it results in death, days away from work, restricted work or job transfer, medical treatment beyond first aid, loss of consciousness, or a significant injury/illness diagnosed by a physician or licensed health care professional. This is a general summary — always confirm recordability decisions against the current OSHA regulation and your OSHA 300 log.
What's a "good" rate?
There's no single universal target — a good rate is relative to your industry. Compare your numbers against the BLS industry average shown above. Many client prequalification systems (ISNetworld, Avetta, PICS, and others) also set their own thresholds for vendors, sometimes based on a rolling 3-year TRIR below a set number, so it's worth checking what your customers require directly.
FAQ
How do I calculate TRIR?
TRIR (Total Recordable Incident Rate) = (total OSHA-recordable cases × 200,000) ÷ total hours worked. The 200,000 represents 100 full-time employees working 40 hours a week, 50 weeks a year, so companies of any size can be compared on the same scale.
What's the difference between TRIR and DART?
TRIR counts every OSHA-recordable injury or illness, including minor cases that only required medical treatment beyond first aid. DART counts only the subset of those cases that resulted in days away from work, job restriction, or job transfer — so DART is always less than or equal to TRIR.
What is a good DART rate?
A "good" rate depends on your industry — compare against the BLS industry average, not a fixed number. Many prequalification systems (ISNetworld, Avetta, PICS) also set their own thresholds, sometimes based on a rolling 3-year TRIR below a set value.
Does DART include first aid?
No. First-aid-only cases aren't OSHA-recordable at all, so they don't factor into TRIR or DART. Only cases that meet OSHA's recordability criteria under 29 CFR 1904 count.
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This tool is for general informational purposes only and does not replace official OSHA recordkeeping or legal requirements. Verify all figures against your OSHA 300/300A logs and consult a qualified safety professional. Read our privacy policy.