.trfr-calculator-wrapper {
max-width: 800px;
margin: 0 auto;
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
color: #333;
line-height: 1.6;
}
.calc-box {
background-color: #f8f9fa;
border: 1px solid #e9ecef;
border-radius: 8px;
padding: 25px;
margin-bottom: 30px;
box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}
.calc-title {
text-align: center;
color: #2c3e50;
margin-bottom: 20px;
font-size: 24px;
font-weight: 700;
}
.form-group {
margin-bottom: 20px;
}
.form-label {
display: block;
margin-bottom: 8px;
font-weight: 600;
color: #495057;
}
.form-input {
width: 100%;
padding: 12px;
border: 1px solid #ced4da;
border-radius: 4px;
font-size: 16px;
box-sizing: border-box;
transition: border-color 0.2s;
}
.form-input:focus {
border-color: #007bff;
outline: none;
box-shadow: 0 0 0 3px rgba(0,123,255,0.25);
}
.calc-btn {
display: block;
width: 100%;
padding: 14px;
background-color: #28a745;
color: white;
border: none;
border-radius: 4px;
font-size: 18px;
font-weight: 600;
cursor: pointer;
transition: background-color 0.2s;
}
.calc-btn:hover {
background-color: #218838;
}
.result-box {
margin-top: 25px;
padding: 20px;
background-color: #fff;
border: 1px solid #dee2e6;
border-radius: 4px;
text-align: center;
display: none;
}
.result-value {
font-size: 36px;
font-weight: 800;
color: #2c3e50;
margin: 10px 0;
}
.result-label {
font-size: 14px;
text-transform: uppercase;
letter-spacing: 1px;
color: #6c757d;
}
.result-explanation {
margin-top: 15px;
font-size: 14px;
color: #555;
background: #e9ecef;
padding: 10px;
border-radius: 4px;
}
.article-content h2 {
color: #2c3e50;
margin-top: 30px;
border-bottom: 2px solid #eee;
padding-bottom: 10px;
}
.article-content p {
margin-bottom: 15px;
}
.article-content ul {
margin-bottom: 20px;
padding-left: 20px;
}
.formula-box {
background: #eef2f7;
padding: 15px;
border-left: 4px solid #007bff;
font-family: monospace;
font-size: 16px;
margin: 20px 0;
overflow-x: auto;
}
function calculateTRFR() {
var incidentsInput = document.getElementById('recordableIncidents');
var hoursInput = document.getElementById('totalHours');
var resultBox = document.getElementById('trfrResult');
var resultValue = document.getElementById('trfrValue');
var resultSummary = document.getElementById('trfrSummary');
var incidents = parseFloat(incidentsInput.value);
var hours = parseFloat(hoursInput.value);
// Validation logic
if (isNaN(incidents) || incidents < 0) {
alert("Please enter a valid number of incidents (0 or greater).");
return;
}
if (isNaN(hours) || hours <= 0) {
alert("Please enter a valid amount of total hours worked (greater than 0).");
return;
}
// Calculation: (Incidents * 200,000) / Total Hours
// The 200,000 constant represents 100 employees working 40 hours per week for 50 weeks.
var trfr = (incidents * 200000) / hours;
// Display Logic
resultBox.style.display = 'block';
resultValue.innerHTML = trfr.toFixed(2);
// Dynamic Interpretation based on generic industry benchmarks
var interpretation = "";
if (trfr === 0) {
interpretation = "Perfect score. No recordable incidents were reported for this period.";
} else if (trfr < 1.0) {
interpretation = "This is generally considered an excellent safety rating across most industries.";
} else if (trfr < 3.0) {
interpretation = "This is a common average for many industries, though specific sectors vary.";
} else {
interpretation = "This rate is higher than average. Review safety protocols and incident reports.";
}
resultSummary.innerHTML = "
What is Total Recordable Frequency Rate (TRFR)?
The Total Recordable Frequency Rate (TRFR), often used interchangeably with the Total Recordable Incident Rate (TRIR), is a standard safety metric used by occupational health and safety organizations (like OSHA in the United States) to quantify safety performance.
Unlike a simple count of accidents, the TRFR normalizes data based on the number of hours worked. This allows companies of different sizes to compare their safety records fairly. It measures the number of recordable injuries and illnesses per 100 full-time employees over a one-year period.
How to Calculate TRFR
The calculation relies on two main data points: the number of OSHA-recordable incidents and the total number of hours worked by all employees. The formula uses a standard constant to equalize the data.
TRFR = (Total Incidents × 200,000) ÷ Total Hours Worked
Where:
- Total Incidents: The count of all work-related injuries and illnesses that resulted in death, days away from work, restricted work, transfer to another job, medical treatment beyond first aid, or loss of consciousness.
- Total Hours Worked: The sum of all actual hours worked by all employees (including overtime) during the specific time period (usually one year).
- 200,000: This constant represents the equivalent of 100 employees working 40 hours a week for 50 weeks (100 × 40 × 50 = 200,000).
Example Calculation
Let's assume a manufacturing company has 250 employees. Over the course of the year:
- The employees worked a combined total of 500,000 hours.
- There were 5 recordable injuries reported during that year.
Using the formula:
(5 × 200,000) ÷ 500,000 = 1,000,000 ÷ 500,000 = 2.0
The company's TRFR is 2.0. This means that for every 100 full-time equivalent employees, 2 employees suffered a recordable injury or illness.
What is a Good TRFR Score?
A "good" score varies significantly by industry. High-risk industries like construction or heavy manufacturing typically have higher average rates than low-risk industries like finance or technology.
- Zero (0.0): The ideal goal, indicating no recordable incidents.
- Below 1.0: Often considered best-in-class for industrial sectors.
- Around 3.0: Historically close to the national average for private industry in the US, though this fluctuates annually.
It is important to compare your TRFR against the specific NAICS code average for your industry to get an accurate assessment of your safety performance.