Medical Treatment Injury Frequency Rate (MTIFR) Calculator
1,000,000 hours (International Standard)
200,000 hours (OSHA Standard)
Your Calculated MTIFR:
0.00
What is Medical Treatment Injury Frequency Rate (MTIFR)?
The Medical Treatment Injury Frequency Rate (MTIFR) is a key safety performance indicator used by health and safety professionals to measure the number of work-related injuries that required treatment by a medical professional but did not result in lost work time. Unlike the Lost Time Injury Frequency Rate (LTIFR), the MTIFR captures "less severe" injuries, providing a broader view of a company's safety culture and potential hazards.
The MTIFR Formula
The calculation is based on the number of medical treatment injuries relative to the total number of hours worked by the entire workforce during a specific period (usually a year or a rolling 12-month period).
MTIFR = (Number of MTIs ÷ Total Hours Worked) × Multiplier
Note on Multipliers: The 1,000,000 multiplier is commonly used in Australia, Europe, and many international standards to represent the rate per million hours worked. The 200,000 multiplier is the standard used in the United States by OSHA, representing the hours worked by 100 employees over a year (40 hours per week × 50 weeks).
Why Track MTIFR?
Leading Indicator: MTIFR often serves as a leading indicator of safety trends. A high MTIFR can suggest that while major accidents aren't happening yet, there are many minor hazards that could eventually lead to a Lost Time Injury (LTI).
Safety Culture: High reporting of MTIs can actually indicate a positive reporting culture where employees feel comfortable reporting minor incidents.
Benchmarking: Companies use this metric to compare their safety performance against industry averages.
Practical Example
Imagine a manufacturing plant where there were 8 injuries requiring a doctor's visit (but no time off work) in one year. During that same year, the total hours worked by all 150 employees amounted to 300,000 hours.
Using the 1,000,000 multiplier:
MTIFR = (8 / 300,000) × 1,000,000 = 26.67
This means for every million hours worked, there are approximately 26.67 medical treatment injuries occurring at the facility.
function calculateMTIFR() {
var mtiCount = document.getElementById("mtiCount").value;
var totalHours = document.getElementById("totalHours").value;
var multiplier = document.getElementById("multiplier").value;
var resultBox = document.getElementById("mtifrResultBox");
var resultDisplay = document.getElementById("mtifrValue");
var interpretation = document.getElementById("mtifrInterpretation");
// Validation
if (mtiCount === "" || totalHours === "" || totalHours <= 0) {
alert("Please enter a valid number of injuries and total hours worked greater than zero.");
return;
}
var mti = parseFloat(mtiCount);
var hours = parseFloat(totalHours);
var factor = parseFloat(multiplier);
// Calculation
var mtifr = (mti / hours) * factor;
// Display
resultDisplay.innerHTML = mtifr.toFixed(2);
resultBox.style.display = "block";
// Dynamic Interpretation
var formattedMultiplier = factor.toLocaleString();
interpretation.innerHTML = "This represents " + mtifr.toFixed(2) + " medical treatment injuries for every " + formattedMultiplier + " hours worked by your team.";
}