Free TRIR & DART Calculator
Compute OSHA incidence rates using the standard 200,000-hour base (100 full-time workers × 40 hours × 50 weeks). This tool does not guarantee compliance outcomes.
Employee hours for the period (exclude non-work travel unless required by your policy).
Number of recordable injuries and illnesses on the OSHA 300 log.
Cases with days away from work, restricted duty, or job transfer.
TRIR: 2.00
DART: 1.00
Formula: (cases × 200,000) ÷ hours worked
Where these numbers come from
TRIR and DART calculations depend on accurate hours worked and case classifications. Rivkor connects those rate calculations to the incident information and OSHA records used to support them, helping teams move from documented cases to logs, reporting preparation, and rate review without maintaining separate spreadsheets.
Learn more in our glossary: What is TRIR? and What is DART?