Safety performance calculator
Calculate a total recordable incident rate using the recordable cases and employee hours worked for the same reporting period.
Enter the recordable cases and employee hours worked, then select Calculate TRIR. The normalized rate and equation will appear here.
Formula
The calculator applies the standardized incidence-rate formula to the values entered for the selected period:
TRIR = (recordable cases × 200,000) ÷ employee hours worked
The 200,000-hour base represents 100 full-time employees working 40 hours per week for 50 weeks. Normalization allows rates from differently sized workforces to be compared on a common basis.
Required inputs
The result expresses the entered recordable-case experience per 100 full-time-equivalent workers. Interpretation should account for workforce size, reporting period, industry, establishment type, recordkeeping quality, and changes in exposure hours.
A small change in case count can produce a large rate change when relatively few employee hours are worked. Rate trends should therefore be reviewed with the underlying events, hazards, controls, and leading indicators.
This calculator does not decide whether an injury or illness is recordable, validate OSHA logs, select an industry benchmark, prove that a workplace is safe, or establish compliance. Review current recordkeeping requirements and qualified guidance before using the result for reporting or business decisions.
The calculator multiplies the entered recordable-case count by 200,000 and divides that value by the employee hours worked during the same reporting period.
The standardized base represents 100 full-time employees working 40 hours per week for 50 weeks. It normalizes incidence rates for comparison across differently sized workforces.
Enter only cases that the employer has determined are recordable for the selected reporting period under the applicable recordkeeping requirements. This calculator does not make recordability determinations.
No. TRIR is a lagging incidence-rate measure and should not be treated as proof of overall safety performance, individual risk, regulatory compliance, or the effectiveness of every hazard control.
Primary references
Review these primary OSHA resources alongside current state-plan, local, project, manufacturer, employer, and qualified-professional requirements that apply to the work.
Official OSHA recordkeeping resources, forms, requirements, and reporting guidance for workplace injuries and illnesses.
Official OSHA clarification of the incidence-rate formula, employee-hours denominator, and standardized 200,000-hour base.
External references are provided for research and verification. Their inclusion does not make a generated document compliant, approved, certified, or complete for a particular workplace.