TRIR Calculator: Total Recordable Incident Rate from Form 300A

The total recordable incident rate, or TRIR, is how many recordable injuries and illnesses you had for every 100 full-time workers over a year. Putting it on that common base is what lets a crew of twelve and a plant of four hundred compare their numbers.

Everything the calculator needs is on your Form 300A summary. Enter the count from each of its four case columns: G (deaths), H (cases with days away from work), I (cases with job transfer or restriction) and J (other recordable cases), then the total hours your employees actually worked in the year. Total recordable cases is those four columns added together, so there's no separate total to enter. It gives back the TRIR, the DART rate, the days-away case rate and the number of full-time equivalents those hours stand for. The page address updates with every change, so a link you copy opens on your own figures.

Worked example: 3 recordable cases in 83,200 hours

These are example figures, not a real company's, and they're what the calculator opens with. Say a shop logged 3 recordable cases in the year: 1 in column H, 1 in column I and 1 in column J. Its employees worked 83,200 hours.

• TRIR: 3 × 200,000 = 600,000, and 600,000 ÷ 83,200 = 7.2115…, so the calculator shows 7.21.
• DART rate: the column H and column I cases together, (1 + 1) × 200,000 ÷ 83,200, which comes to 4.81.
• Days-away case rate: the column H case alone, 1 × 200,000 ÷ 83,200, which is 2.40.
• Full-time equivalents: 83,200 hours ÷ 2,000 = 41.6.

That last figure trips people up. 83,200 hours is exactly what 40 people working 2,080 hours each add up to, yet the calculator says 41.6. The 200,000-hour base counts a full-time year as 2,000 hours, so the FTE figure is a count of those 2,000-hour years, not your headcount.

Worked example: BLS's ABC Company

The Bureau of Labor Statistics works its own example in Appendix C, How to Compute Your Firm's Incidence Rate for Safety Management. Its ABC Company had 11 recordable cases, 5 of them with days away from work, in 130,000 hours worked. Enter 5 in column H, the other 6 in column J and 130,000 hours here, and the calculator gives a TRIR of 16.92 and a days-away case rate of 7.69.

BLS rounds to one decimal: "Therefore, the ABC Company experienced a rate of 16.9 injuries and illnesses per 100 full-time employees." Its days-away rate is printed as 7.7. The calculator shows two decimals, rounded half up, which is a choice this site makes so that small changes in your own numbers stay visible. Round either two-decimal figure here to one place and you get BLS's number back.

The DART rate here is also 7.69, because the example puts nothing in column I. Appendix C doesn't say what the other 6 cases were, so this assumes they belong in column J. The 130,000 hours come to 65.0 full-time equivalents.

The formula

The instructions in OSHA's recordkeeping forms package give the TRIR as a single line: "Total number of injuries and illnesses X 200,000 ÷ Number of hours worked by all employees = Total recordable case rate". The DART rate and the days-away rate use the same arithmetic with a smaller case count on top: columns H and I together for DART, and column H alone for days away.

The 200,000 isn't arbitrary. The forms package explains it: "The 200,000 figure in the formula represents the number of hours 100 employees working 40 hours per week, 50 weeks per year would work". Multiplying by it and dividing by your hours scales your case count to that imaginary 100-person workforce.

What counts as a recordable case

The case count is the number of entries in columns G, H, I and J of your OSHA 300 Log: the sum of the G, H, I and J totals on your 300A. Each case sits in one column only, so adding the four columns never counts a case twice.

First aid alone never makes a case recordable, so a case doesn't join this count just because first aid was given. If you aren't sure whether an injury made the log, run it through the recordability checker before you work out a rate.

Common mistakes

• Counting first-aid cases. A cleaned and bandaged scrape isn't a recordable case on its own, and adding it inflates every rate on this page.
• Using hours paid instead of hours worked. Appendix C says the hours figure "should not include any nonwork time, even though paid, such as vacation, sick leave, holidays, and so forth".
• Using headcount × 2,080 when you have the actual hours. A standard year per person counts leave as if it were worked, and misses overtime and the shorter hours of part-time workers. If payroll or other time records show the hours actually worked, use them. If they don't, the optional worksheet on the Form 300A gives a way to estimate the total: the number of full-time employees times the hours a full-time employee works in a year, plus any overtime hours and the hours of part-time, temporary and seasonal workers. The hours worksheet does that sum for you, or uses the total you enter from your records.
• Counting a case in two years. When a case happens in one year and the days away run into the next, paragraph (b)(3)(ix) of 29 CFR 1904.7 has you record it once, on the log for the year the injury or illness occurred. It belongs in that year's rate only.

How your rate compares

The Bureau of Labor Statistics release USDL-26-0101, published January 22, 2026, reports that in 2024 "the incidence rate of total recordable cases (TRC) in private industry was 2.3 cases per 100" full-time equivalent workers. The same paragraph gives 2.4 for 2023. The survey behind it counts nonfatal cases only (the release opens with employers' "nonfatal workplace injuries and illnesses"). This calculator's count includes column G, so a year with a death on the log is counting one kind of case that BLS's 2.3 leaves out.

That figure covers all of private industry together. BLS also publishes rates by industry, and this site will add that comparison once the figures have been checked against BLS's own tables. Until then, 2.3 is the only benchmark given here.

TRIR isn't the only injury rate you'll see quoted, and not every term you'll run into is one OSHA or BLS actually defines. TRIR, DART, LTIR and the others lays out six of them side by side — which ones come with a federal formula, and which are industry shorthand with none.

Rounding

Each rate is worked out exactly from your whole-number inputs and rounded half up once, to two decimals. BLS prints its rates to one decimal. Full-time equivalents are shown to one decimal.

When hours worked is 0, the calculator shows Enter the total hours worked in place of a rate. When a shared link has more cases in columns H and I than in its total recordable cases, it says so instead of showing a rate, since those two columns are part of that total.

What 1 or 3 recordable cases do to the TRIR at different workforce sizes (2,000 hours per full-time worker)

What 1 or 3 recordable cases do to the TRIR at different workforce sizes (2,000 hours per full-time worker)

Full-time workers	Hours worked	TRIR with 1 case	TRIR with 3 cases
10	20,000	10.00	30.00
25	50,000	4.00	12.00
50	100,000	2.00	6.00
100	200,000	1.00	3.00
250	500,000	0.40	1.20
500	1,000,000	0.20	0.60

Sources (4)

1. OSHA, Forms for Recording Work-Related Injuries and Illnesses (incidence rate instructions) osha.gov
2. BLS, Appendix C. How to Compute Your Firm's Incidence Rate for Safety Management bls.gov
3. BLS, Employer-Reported Workplace Injuries and Illnesses, 2023-2024 (USDL-26-0101, January 22, 2026) bls.gov
4. 29 CFR 1904.7, General recording criteria (eCFR) ecfr.gov

Updated September 19, 2026