OSHA Incident Rate Calculator
The OSHA Incident Rate (or DART Rate – Days Away, Restricted, or Transferred) is a crucial metric for workplace safety. It helps employers and regulatory bodies understand the frequency of work-related injuries and illnesses that result in lost time or require specific work modifications. This calculator helps you compute your OSHA Incident Rate based on the number of recordable incidents, total hours worked, and the number of employees.
Your OSHA Incident Rate:
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The OSHA Incident Rate is calculated per 100 full-time employees working 40 hours per week for 50 weeks a year. The formula is:
(Number of Recordable Incidents × 200,000) / Total Employee Hours Worked
The '200,000' in the formula represents the number of hours 100 full-time employees would work in a year (100 employees × 40 hours/week × 50 weeks/year). This standardizes the rate so you can compare your workplace's safety performance against industry averages or track your own progress over time.
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function calculateIncidentRate() {
var recordableIncidentsInput = document.getElementById("recordableIncidents");
var totalHoursWorkedInput = document.getElementById("totalHoursWorked");
var numberOfEmployeesInput = document.getElementById("numberOfEmployees");
var resultDisplay = document.getElementById("result");
var recordableIncidents = parseFloat(recordableIncidentsInput.value);
var totalHoursWorked = parseFloat(totalHoursWorkedInput.value);
var numberOfEmployees = parseFloat(numberOfEmployeesInput.value);
// Input validation
if (isNaN(recordableIncidents) || recordableIncidents < 0) {
resultDisplay.textContent = "Please enter a valid number for recordable incidents.";
resultDisplay.style.color = "#dc3545"; // Red for error
return;
}
if (isNaN(totalHoursWorked) || totalHoursWorked <= 0) {
resultDisplay.textContent = "Please enter a valid positive number for total hours worked.";
resultDisplay.style.color = "#dc3545";
return;
}
if (isNaN(numberOfEmployees) || numberOfEmployees <= 0) {
resultDisplay.textContent = "Please enter a valid positive number for the number of employees.";
resultDisplay.style.color = "#dc3545";
return;
}
// Calculate OSHA Incident Rate
var incidentRate = (recordableIncidents * 200000) / totalHoursWorked;
// Display the result
resultDisplay.textContent = incidentRate.toFixed(2); // Display with two decimal places
resultDisplay.style.color = "#28a745"; // Green for success
}