TRIR Calculator Total Recordable Incident Rate (TRIR) = (Recordable Incidents × 200,000) ÷ Total Hours Worked Recordable incidents Count of OSHA recordable incidents for the period. Total hours worked Total employee hours worked for the same period. Calculate TRIR Reset TRIR — Note: 200,000 represents 100 full-time employees working 40 hours/week for 50 weeks/year.