TRIR (Total Recordable Incident Rate) Calculator
Calculate your organization's Total Recordable Incident Rate (TRIR) using OSHA's standard formula. TRIR measures the number of recordable workplace incidents per 100 full-time employees per year.
Total OSHA recordable incidents in the period (injuries + illnesses)
Sum of all hours worked by every employee during the period
OSHA uses 200,000 hours as the standard base for 100 FTE workers
Formula
TRIR = (N × 200,000) / H
- N — Number of OSHA recordable incidents (injuries and illnesses) in the measurement period
- 200,000 — OSHA constant representing 100 full-time employees working 2,000 hours per year (100 employees × 50 weeks × 40 hrs/week)
- H — Total hours worked by all employees during the measurement period
The result expresses the incident rate per 100 full-time equivalent workers, enabling fair comparison across organizations of different sizes.
Assumptions & References
- The 200,000-hour constant assumes a standard work year of 2,000 hours per employee (50 weeks × 40 hours/week) for 100 employees.
- Recordable incidents are defined by OSHA 29 CFR 1904 and include work-related fatalities, injuries, and illnesses that result in days away from work, restricted work, job transfer, medical treatment beyond first aid, loss of consciousness, or diagnosis by a healthcare professional.
- Hours worked should include overtime but exclude vacation, sick leave, and other non-worked hours.
- The measurement period is typically one calendar year but can be any defined period as long as hours and incidents are consistent.
- The U.S. Bureau of Labor Statistics (BLS) publishes annual TRIR benchmarks by industry NAICS code — compare your result against your specific sector average.
- A national all-industry average TRIR of approximately 2.7–3.0 is commonly cited (BLS Survey of Occupational Injuries and Illnesses).
- Some industries (construction, logging, agriculture) have significantly higher average TRIRs; others (finance, professional services) are much lower.
- Reference: OSHA Recordkeeping Rule — 29 CFR Part 1904; BLS Occupational Injuries and Illnesses Survey.