Free tool
Work out your TRIR and DART rates.
Enter your recordable cases and the hours your people worked. You'll get your total recordable incident rate and your DART rate, with the math shown so you can check it.
Also calledTotal recordable incident rate calculator, OSHA incident rate calculator, DART rate calculator
Don’t have the hours? Estimate them.
2,000 hours is one full-time year. Use your payroll hours if you have them.
Your rates
TRIR
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DART rate
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Enter your recordable cases and hours to see TRIR.
Enter your DART cases to see the DART rate.
This calculator does the arithmetic. It doesn’t decide what’s recordable, and it isn’t legal advice. OSHA’s recordkeeping rules decide that. Nothing you type leaves your browser.
The formulas
Two rates, one base.
Both rates use the same 200,000 hour base, so they're easy to compare across sites and years.
TRIR. (Recordable cases × 200,000) ÷ hours worked by all employees.
DART rate. (Cases with days away, restricted work or job transfer × 200,000) ÷ hours worked by all employees.
A worked example
Three cases, 450,000 hours.
A company records 3 cases in a year, and its employees work 450,000 hours. Two of the three cases involved days away, restricted work or a transfer.
01
TRIR. 3 × 200,000 = 600,000. Divide by 450,000 and you get 1.33.
02
DART rate. 2 × 200,000 = 400,000. Divide by 450,000 and you get 0.89.
03
Reading it. A TRIR of 1.33 means about 1.33 recordable cases for every 100 full-time employees that year.
What counts
What's a recordable case?
A recordable case is a work-related injury or illness that meets OSHA's recording criteria. In general, that means one that involves:
- Death.
- Days away from work.
- Restricted work or transfer to another job.
- Medical treatment beyond first aid.
- Loss of consciousness.
- A significant injury or illness diagnosed by a physician or other licensed health care professional.
To see how your rate compares, look up your industry’s published average from the Bureau of Labor Statistics. Compare like with like. A roofing contractor and an office have very different baselines.
Common questions
- What is TRIR?
- TRIR is the total recordable incident rate. It shows how many OSHA recordable injuries and illnesses happened for every 100 full-time employees in a year. The formula is recordable cases times 200,000, divided by the hours worked by all employees.
- What is DART?
- DART stands for days away, restricted or transferred. The DART rate counts only the recordable cases that involved days away from work, restricted work or a job transfer, using the same 200,000 hour base as TRIR.
- What is a good TRIR?
- Lower is better, and there's no single number that's good for everyone. Rates differ a lot by industry, so compare yours with the published average for your own industry. The Bureau of Labor Statistics publishes those every year.
- Why is the number 200,000?
- It stands for 100 full-time employees working 40 hours a week for 50 weeks. Using it for every company puts a small crew and a large one on the same scale, so the rates can be compared.
- Which hours should I count?
- Count the hours employees actually worked, including overtime. Leave out paid time off like vacation and sick leave. If you don't track hours, an estimate of 2,000 hours per full-time employee is a common stand-in, but payroll hours are better.
Get the numbers without the spreadsheet.
Report incidents from the phone, track corrective actions, and keep the record in one place. Your rates come from records you can open, not a number somebody typed.