🚧 DART Rate Calculator
Days Away, Restricted or Transferred cases per 200,000 hours worked.
DART Rate = (DART cases × 200,000) ÷ total hours worked. DART is a subset of your recordables (TRIR): only cases serious enough to cause days away, restricted duties or a job transfer. It is often the rate regulators and clients scrutinise most closely.
Frequently asked questions
What is the DART rate?
DART stands for Days Away, Restricted or Transferred. The DART rate is the number of recordable cases that caused days away from work, restricted duties or a job transfer, per 200,000 hours worked.
How do you calculate the DART rate?
DART Rate = (number of DART cases × 200,000) ÷ total hours worked. Example: 2 DART cases over 300,000 hours gives (2 × 200,000) ÷ 300,000 ≈ 1.33.
What is the difference between DART and TRIR?
DART cases are a subset of recordables. TRIR counts every recordable case; DART counts only those serious enough to take someone away from work, restrict their duties or transfer them. When calculated using the same OSHA definitions and population, the DART rate cannot exceed the TRIR.
Why does DART matter?
DART adds information about how injuries and illnesses affect people’s ability to do their normal work, including qualifying restricted-work and transfer cases. It is widely used in US reporting and often requested in contractor prequalification.