OSHA incident rate calculator

TRIR / DART / LTIR Safety Incident Rate Calculator

Benchmark

Industry Comparison

Self-tests not run

Inputs

Incident Rows

Year Hours worked Recordable cases DART cases Lost-time cases Lost workdays Remove
Paste rows

Total hours 0
Current TRIR N/A
Current DART N/A
Current LTIR N/A

Outputs

Calculated Rates

Year TRIR DART LTIR Severity rate Trend Interpretation
TRIR = (recordable cases x 200,000) / hours worked
DART = (DART cases x 200,000) / hours worked
LTIR = (lost-time cases x 200,000) / hours worked
Severity = (lost workdays x 200,000) / hours worked

About the TRIR / DART / LTIR Safety Incident Rate Calculator

Tracking workplace injuries through standardized metrics is mandatory for regulatory compliance and assessing organizational safety culture. Calculating OSHA incident rates like TRIR, DART, and LTIR normalizes injury data per 100 employees, allowing companies to benchmark their safety performance against industry averages. Safety managers and HR professionals use these metrics to lower insurance premiums and identify operational hazards.

How it works

  1. Input the total number of hours worked by all employees during the evaluation period.
  2. Enter the total number of OSHA-recordable injuries and illnesses.
  3. Specify how many cases involved days away from work, restricted activity, or job transfer.
  4. Review the generated Total Recordable Incident Rate and Days Away, Restricted, or Transferred rate.

Frequently asked questions

How is the base number 200,000 used in these formulas?

The 200,000 figure represents the equivalent of 100 employees working 40 hours per week for 50 weeks, providing a standard baseline for companies of all sizes.

What qualifies as an OSHA-recordable incident?

Recordable incidents include work-related fatalities, injuries requiring medical treatment beyond first aid, loss of consciousness, or cases requiring days away from work or restricted duties.

What is the difference between TRIR and DART?

TRIR encompasses all recordable incidents, while DART focuses only on the more severe cases that resulted in days away from work, restricted work, or job transfer.

Does this metric apply to contractors on site?

Typically, the host employer must record injuries of temporary workers if they provide day-to-day supervision, but exact requirements depend on specific OSHA recordkeeping definitions.

References