TRIR and DART rate calculator
Get your TRIR and DART rates: OSHA-recordable cases times 200,000, divided by hours worked.
Formula: cases × 200,000 ÷ hours worked. Compare to your own prior years first; national averages vary by industry code. See TRIR and DART rates for how to read the result and where to find benchmarks.
Four steps.
- Count the OSHA-recordable cases on your 300 log for the year.
- Add up the hours your employees actually worked, not paid hours or vacation.
- For DART, count cases with days away, restricted work or job transfer.
- Compare with your own past years first. Benchmarks vary by industry (NAICS code).
About this tool.
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Why 200,000 hours?
It is the hours 100 full-time employees work in a year: 100 people × 40 hours × 50 weeks. That gives a rate per 100 full-time workers a year, so sites of different sizes can be compared.
What counts as hours worked?
Hours actually worked by all employees, including temporary and seasonal staff you supervise. Leave out vacation, sick leave and holidays. If you lack exact figures, OSHA's Form 300A instructions explain how to estimate.
Is a lower TRIR always better?
No. A low rate can mean a safe workplace or under-reporting. Pair it with near-miss volume and how fast corrective actions close. A healthy reporting culture often shows more near misses, not fewer.
Start with one incident.
Create your kit in about ten minutes and report the first incident the same day. Free to start, no card.