OSHA DART Rate Calculator
The OSHA Days Away, Restricted, or Transferred (DART) rate is a key metric used to track workplace safety. It measures the number of OSHA recordable injuries and illnesses that result in days away from work, restricted work activity, or job transfer per 100 full-time workers.
The formula for the DART rate is:
DART Rate = (Number of DART Cases × 200,000) / Total Number of Hours Worked
The 200,000 represents the number of hours 100 full-time employees would work in a year (100 employees × 40 hours/week × 50 weeks/year).
function calculateDartRate() {
var dartCasesInput = document.getElementById("dartCases");
var totalHoursWorkedInput = document.getElementById("totalHoursWorked");
var dartRateResultElement = document.getElementById("dartRateResult");
var dartCases = parseFloat(dartCasesInput.value);
var totalHoursWorked = parseFloat(totalHoursWorkedInput.value);
if (isNaN(dartCases) || isNaN(totalHoursWorked) || dartCases < 0 || totalHoursWorked <= 0) {
dartRateResultElement.textContent = "Please enter valid, non-negative numbers for cases and a positive number for hours worked.";
return;
}
var dartRate = (dartCases * 200000) / totalHoursWorked;
dartRateResultElement.textContent = dartRate.toFixed(2);
}