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Calcimator

OSHA Recordable Rate Calculator

Calculate TRIR and DART rates from hours worked and incident counts.

Inputs

Results

TRIR

2

DART Rate

1.2

Incidents per Employee0.02
Hours Worked500,000
How to Use This Calculator
  1. Enter total OSHA recordable incidents for the period from your OSHA 300 log.
  2. Enter DART cases — incidents involving days away, restricted duty, or job transfer.
  3. Enter total employee hours worked for the same period.
  4. Read TRIR and DART Rate, both scaled per 200,000 hours worked (100 employees over a year).
  5. Review Incidents per Employee alongside TRIR and DART Rate to gauge overall incident frequency.

How the result changes with Total Recordable Incidents

Total Recordable IncidentsTRIRDART Rate
100401.2
3501401.2
6502601.2
9003601.2

What each input means

Total Recordable Incidents
Total OSHA recordable incidents in the period.
DART Cases
Days Away, Restricted, or Transferred cases.
Total Hours Worked
Total employee hours worked in the period.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    Total Recordable Incidents = 5, DART Cases = 3, Total Hours Worked = 500000 = 3 input(s) provided
  2. Calculate TRIR
    TRIR
    2 = 2
  3. Calculate DART Rate
    DART Rate
    1.2 = 1.2
  4. Calculate Incidents per Employee
    Incidents per Employee
    0.02 = 0.02
  5. Calculate Hours Worked
    Hours Worked
    500000 = 500000

Engine last updated . Checked against 2 independently-derived tests — how we verify calculators.

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