Total Recordable Incident Rate (TRIR) Calculator
Free TRIR calculator: compute your Total Recordable Incident Rate using OSHA formula. Track workplace safety incidents per 100 full-time employees with charts and analysis.
About This Calculator
The Total Recordable Incident Rate (TRIR) Calculator helps businesses, safety managers, and HR professionals compute their OSHA recordable incident rate. TRIR is a key workplace safety metric that measures the number of recordable work-related injuries and illnesses per 100 full-time employees over a one-year period. It is widely used across industries including construction, manufacturing, healthcare, logistics, and oil and gas.
Our calculator uses the standard OSHA formula: TRIR = (Number of recordable incidents × 200,000) / Total hours worked. The constant 200,000 represents 100 full-time employees working 40 hours per week for 50 weeks. The result provides a standardized incident rate that allows comparison across companies of different sizes and industries. The calculator also provides a risk level assessment: Low (below 3.0), Moderate (3.0 to 8.0), and High (above 8.0), helping you benchmark your safety performance against industry standards.
How to use: Enter the total hours worked by all employees during the measurement period and the number of OSHA recordable incidents that occurred. The calculator will compute your TRIR, risk level, and incidents per 100 full-time employees, with detailed breakdowns and interactive charts.
Regional Notes
United States: TRIR is an OSHA (Occupational Safety and Health Administration) metric. Companies with more than 10 employees must maintain OSHA 300 logs and report annually. A TRIR above 4.0 often triggers OSHA inspection priority. Health care, manufacturing, and construction typically benchmark below 3.0.
India: India uses the IS 14489 (Safety and Health Standard) and Factories Act reporting systems. The equivalent metric is often the frequency rate (FR) per 1,000,000 man-hours or the severity rate. The Bureau of Indian Standards provides guidelines for calculating and reporting workplace incident rates.
United Kingdom: The UK uses RIDDOR (Reporting of Injuries, Diseases and Dangerous Occurrences Regulations) with incidence rates reported per 100,000 employees. The Health and Safety Executive (HSE) publishes annual statistics. While TRIR is not a UK regulatory metric, many UK-based multinational companies use it for global safety reporting consistency.
Frequently Asked Questions
What is TRIR in workplace safety?
TRIR stands for Total Recordable Incident Rate. It is an OSHA safety metric that measures the number of recordable work-related injuries and illnesses per 100 full-time employees over a one-year period. The formula is TRIR = (Number of recordable incidents × 200,000) / Total hours worked.
How is TRIR calculated?
TRIR is calculated using the formula: TRIR = (Number of recordable incidents × 200,000) / Total hours worked. The 200,000 represents 100 full-time employees working 40 hours per week for 50 weeks. For example, if a company has 2 recordable incidents and 500,000 hours worked, the TRIR would be (2 × 200,000) / 500,000 = 0.8.
What is considered a good TRIR rate?
A TRIR below 3.0 is considered low and indicates excellent workplace safety. A TRIR between 3.0 and 8.0 is moderate and may trigger OSHA attention. A TRIR above 8.0 is considered high and poses significant risk of OSHA inspection, penalties, and increased insurance premiums.
What incidents are recordable under OSHA?
OSHA recordable incidents include: medical treatment beyond first aid, significant injuries diagnosed by a physician (fractures, cancer, chronic disease), days away from work, restricted work or job transfer, loss of consciousness, and work-related deaths. First aid only incidents are not recordable.
How often should TRIR be calculated?
TRIR is typically calculated on an annual basis using the total hours worked and incidents from the previous calendar year. Some organizations track it quarterly or monthly for trending. OSHA requires companies to maintain records for 5 years and report annually.
Is TRIR used outside the United States?
While TRIR is an OSHA (US) metric, it is widely used by multinational companies and international organizations as a global safety benchmark. Many countries have similar metrics: the UK uses the RIDDOR reporting system with an incidence rate per 100,000 employees, and international standards like ISO 45001 use lost time injury frequency rates (LTIFR).
What is the difference between TRIR and DART rate?
TRIR includes all OSHA recordable incidents (medical treatment, restricted work, days away, etc.), while DART (Days Away, Restricted, or Transferred) rate specifically counts only incidents that result in days away from work, restricted work activity, or job transfer. DART is a subset of the broader TRIR metric, typically about 50-60% of the TRIR value.
Can TRIR be zero?
Yes, a TRIR of zero is possible if a company has no recordable incidents during the measurement period. While zero TRIR is the ideal safety goal, very low TRIR values may sometimes indicate under-reporting. OSHA emphasizes that a zero TRIR should reflect genuine safety excellence, not incomplete recordkeeping.