TRIR calculator: OSHA incident rate and DART rate
Your total recordable incident rate and DART rate: recordable injuries and illnesses, and the cases with days away, restricted work or job transfer, per 100 full-time workers a year.
Your numbers
See your resultResult
TRIR 2.40recordable cases per 100 full-time workers DART rate 0.80 Full-time workers this equals 125hours ÷ 2,000 Stop working this out by handFleetZap inspection procedures with required steps and a QR check on every machine keep the records behind a safer shop.
See FleetZap Maintenance · Try the demoThe formula
TRIR = Recordable cases × 200,000 ÷ Hours worked · DART = DART cases × 200,000 ÷ Hours worked
200,000 is the hours 100 employees work in a year at 40 hours a week for 50 weeks, the base OSHA uses for incidence rates. With the example: 3 cases in 250,000 hours is a TRIR of 2.4, and 1 DART case is a DART rate of 0.8. Compare with the Bureau of Labor Statistics rates for your industry. Use the cases on your OSHA 300 log, and the hours actually worked, not paid.
Using the numberWhat to do with it
- Customers and general contractors often ask for TRIR before they hire you; keep it current.
- One case moves a small company’s rate a lot. Track near misses too; they show trouble before it becomes a recordable.
- Many injuries in shops come from rushed or skipped steps. Required steps in procedures and pre-use checks keep them in.
Guides behind this calculator
Maintenance KPIs Lockout/tagout (LOTO) OSHA forklift inspection requirementsMore free calculators
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The heart of FleetZap, and everything a maintenance team needs in one place: work orders and preventive maintenance, inspections and the field app, plus a parts store with purchasing, compliance and certificate tracking, multi-location assets with a full lifecycle, and the KPIs that prove it’s working.
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- Preventive maintenance
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Good to know
How do you calculate TRIR?TRIR = recordable cases × 200,000 ÷ total hours worked. 3 cases in 250,000 hours is a TRIR of 2.4.
What is the DART rate?Cases with days away from work, restricted work or job transfer × 200,000 ÷ hours worked.
Why 200,000 hours?It's the hours 100 full-time employees work in a year (40 hours × 50 weeks), so rates compare across company sizes.
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