📋 TRIR Calculator
Total Recordable Incident Rate — recordable cases per 200,000 hours worked (OSHA basis).
TRIR = (Recordable incidents × 200,000) ÷ total hours worked. The 200,000 base represents 100 full-time workers over a year. A recordable is any work-related death, days-away case, restricted-work/transfer case, or medical treatment beyond first aid.
Frequently asked questions
What is TRIR?
TRIR (Total Recordable Incident Rate) is the number of OSHA-recordable work-related injuries and illnesses per 200,000 hours worked — roughly the rate per 100 full-time workers per year.
How do you calculate TRIR?
TRIR = (number of recordable cases × 200,000) ÷ total hours worked. Example: 4 recordables over 400,000 hours gives (4 × 200,000) ÷ 400,000 = 2.0.
What makes an incident recordable?
Under OSHA’s recordkeeping rule (29 CFR 1904), a work-related case is generally recordable if it results in death, days away from work, restricted work or job transfer, medical treatment beyond first aid, or loss of consciousness, among other criteria including certain significant diagnosed injuries and illnesses.
Why is TRIR based on 200,000 hours?
200,000 hours corresponds to 100 full-time employees working 2,000 hours each per year (40 hours a week for 50 weeks). It normalises results so organisations of different sizes can be compared.
What is the difference between TRIR and LTIFR?
TRIR counts all recordable cases (including medical treatment and restricted work) per 200,000 hours; LTIFR counts only lost-time injuries, usually per 1,000,000 hours. TRIR is broader and widely used in the US; LTIFR is commonly used in international reporting.