TRIR Calculator

Calculate your OSHA Total Recordable Incident Rate (TRIR) from recordable incidents and total hours worked, then compare it against an industry benchmark rate.

Quick Facts

Formula
TRIR = (Incidents × 200,000) ÷ Hours Worked
200,000 = 100 full-time employees × 2,000 hours/year — OSHA's standard base rate for comparing companies of any size.
What counts
OSHA-recordable incidents only
Deaths, days away from work, restricted work or job transfer, loss of consciousness, or medical treatment beyond first aid.

Your Results

Calculated
TRIR
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Recordable incidents per standard hours base
Full-time equivalent workers
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Hours worked ÷ 2,000 hours/year
vs. benchmark
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Percent difference from your benchmark rate
Rate classification
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How this TRIR compares to the benchmark

Ready

Enter recordable incidents, hours worked, and a benchmark rate, then press Calculate.

How the TRIR Calculator works

The Total Recordable Incident Rate (TRIR) is the standard OSHA metric U.S. employers use to track workplace safety performance over time and benchmark it against other companies. It converts a raw incident count into a rate that is comparable across organizations of any size, by scaling incidents to a standard number of hours worked.

The formula

For N OSHA-recordable incidents and H total hours worked by all employees during the period:

TRIR = (N × 200,000) ÷ H

The constant 200,000 represents the hours 100 full-time employees would work in a year (100 employees × 40 hours/week × 50 weeks) — OSHA's standard base rate. Some organizations outside the U.S., or industries that report per-capita safety data differently, use 1,000,000 hours instead; the calculator's rate basis selector switches between the two conventions without changing your incident or hours totals.

Worked example

Take 8 recordable incidents across 480,000 hours worked (roughly 240 full-time-equivalent employees at 2,000 hours each). TRIR = (8 × 200,000) ÷ 480,000 ≈ 3.33. Scaled to a company of 100 full-time employees, that means you would expect about 3.33 recordable incidents per year at this rate.

What moves the rate most

  • Incident count: TRIR scales linearly with recordable incidents — cutting incidents in half cuts the rate in half, all else equal.
  • Hours worked: the same incident count produces a lower TRIR at a larger, busier workforce, because the incidents are spread across more exposure hours. Compare rates only when you understand how the hours were counted.
  • What counts as "recordable": inconsistent classification of borderline cases (first aid versus medical treatment) is a common source of TRIR differences between sites or years that has nothing to do with actual safety performance.

TRIR versus other OSHA safety metrics

TRIR counts every OSHA-recordable case, so it is broader than the Lost Time Incident Rate (LTIR), which counts only incidents causing time away from work, or the DART rate, which adds restricted-work and job-transfer cases to lost-time cases. TRIR is usually the headline figure because it captures the fullest picture of recordable injuries and illnesses, but a company can hold a stable TRIR while its DART rate — the more severe subset — moves independently.

Frequently Asked Questions

How is TRIR calculated?
TRIR uses OSHA's formula: TRIR = (number of recordable incidents × 200,000) / total hours worked by all employees. The constant 200,000 represents the hours 100 full-time employees would work in a year (100 × 40 hours/week × 50 weeks), so the result is scaled to a standard company size for fair comparison across organizations.
What counts as an OSHA-recordable incident?
A recordable incident is any work-related injury or illness resulting in death, days away from work, restricted work or job transfer, loss of consciousness, medical treatment beyond first aid, or a significant injury or illness diagnosed by a physician. Injuries treated with first aid alone are not recordable.
What is a good TRIR?
There is no single "good" TRIR — it depends heavily on industry, since some sectors are inherently more hazardous than others. Comparing your rate to your industry's published average, such as figures from the U.S. Bureau of Labor Statistics or a trade association, is far more meaningful than comparing to an arbitrary number. Enter that published average as the benchmark in this calculator to see how you compare.
Why does the calculator offer 1,000,000 hours as well as 200,000?
200,000 hours is OSHA's standard base rate, representing 100 full-time employees working 2,000 hours each in a year. Some organizations outside the U.S., or in industries that report incident rates per million hours worked, use 1,000,000 as the base instead. The rate basis selector switches between the two conventions without changing your incident count or hours total.

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