Enter the total number of OSHA-recordable injuries and illnesses.
Total hours worked by all employees during the period (including overtime).
Total Recordable Incident Rate (TRIR)
0.0
Calculation: (X × 200,000) ÷ Y
function calculateTRIR() {
var incidentsInput = document.getElementById('numIncidents').value;
var hoursInput = document.getElementById('totalHours').value;
var resultDiv = document.getElementById('result-area');
var trirDisplay = document.getElementById('trirResult');
var calcIncidentsDisplay = document.getElementById('calcIncidents');
var calcHoursDisplay = document.getElementById('calcHours');
var interpretationDisplay = document.getElementById('interpretationText');
// Parse values
var incidents = parseFloat(incidentsInput);
var hours = parseFloat(hoursInput);
// Validation
if (isNaN(incidents) || incidents < 0) {
alert("Please enter a valid number of incidents.");
return;
}
if (isNaN(hours) || hours <= 0) {
alert("Please enter a valid total for hours worked (must be greater than 0).");
return;
}
// OSHA Formula: (Incidents * 200,000) / Total Hours
var constant = 200000;
var trir = (incidents * constant) / hours;
// Display results
resultDiv.style.display = "block";
trirDisplay.innerHTML = trir.toFixed(2);
calcIncidentsDisplay.innerHTML = incidents;
calcHoursDisplay.innerHTML = hours;
// Simple interpretation logic (Generic benchmarks)
var message = "";
if (trir === 0) {
message = "Excellent! A rate of 0 means no recordable incidents occurred.";
interpretationDisplay.style.color = "green";
} else if (trir = 3.0 && trir < 6.0) {
message = "This falls within a moderate range. Review safety protocols to lower the rate.";
interpretationDisplay.style.color = "#d39e00";
} else {
message = "This rate is high. Immediate safety audit and risk assessment recommended.";
interpretationDisplay.style.color = "#dc3545";
}
interpretationDisplay.innerHTML = "Analysis: " + message;
}
Understanding the Total Recordable Incident Rate (TRIR)
The Total Recordable Incident Rate (TRIR) is a standardized safety metric used by the Occupational Safety and Health Administration (OSHA) to quantify a company's safety performance. It allows organizations of different sizes to compare their safety records fairly by normalizing the data based on the number of hours worked.
The TRIR Formula Explained
The standard formula used for calculating the incident rate is:
TRIR = (Number of OSHA Recordable Incidents × 200,000) / Total Hours Worked
You might wonder, why 200,000? This constant represents the equivalent of 100 full-time employees working 40 hours per week for 50 weeks a year (100 × 40 × 50 = 200,000). By using this constant, the TRIR effectively calculates the number of injuries per 100 full-time equivalent workers.
What Counts as a "Recordable Incident"?
Not every minor cut or bruise goes into this calculation. For an incident to be OSHA-recordable, it generally must result in one of the following:
Death.
Days away from work.
Restricted work or transfer to another job.
Medical treatment beyond first aid.
Loss of consciousness.
Significant injury or illness diagnosed by a physician.
Why Is TRIR Important?
Monitoring your Recordable Incident Rate is crucial for several reasons:
Compliance: It helps ensure you meet OSHA record-keeping requirements.
Insurance Costs: High TRIR scores can lead to increased workers' compensation premiums.
Bidding Eligibility: Many clients, particularly in construction and manufacturing, require contractors to have a TRIR below a certain threshold to bid on projects.
Internal Benchmarking: It allows safety managers to track performance year-over-year.
Interpreting Your Score
While a "good" TRIR varies significantly by industry (construction naturally has higher rates than finance), generally speaking, a lower score is better. A score of 0.0 is the ideal target, indicating a perfect safety record for the period.
According to Bureau of Labor Statistics (BLS) data, many industries aim for a TRIR below 3.0. Scores above the industry average may trigger OSHA inspections or require a comprehensive review of workplace safety protocols.
Industry Sector (Examples)
Approximate Average TRIR
Construction
2.5 – 3.5
Manufacturing
3.0 – 4.0
Transportation & Warehousing
4.0 – 5.0
Professional Services
< 1.0
*Note: Averages fluctuate yearly based on BLS reports. Always compare against the most recent NAICS code data.