Free OSHA incident-rate tool
DART Rate Calculator
Calculate the Days Away, Restricted or Transferred case rate using DART cases and total hours worked.
DART formula
DART Rate = (DART Cases × 200,000) ÷ Total Hours Worked
DART focuses on cases involving days away from work, restricted work activity or job transfer.
This tool calculates a rate only. Case classification should follow applicable OSHA recordkeeping requirements.
Use DART as a management signal.
Pair DART with severity, repeat-event trends, restricted-duty duration, root causes and leading indicators to get a more complete picture.
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