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What is LTIFR?
LTIFR measures the normalized frequency of lost time injuries during a defined reporting period.
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SAFETY PERFORMANCE CALCULATOR
LTIFR Calculator
Calculate the Lost Time Injury Frequency Rate using lost time injuries and total hours worked.
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Tip: For accurate comparison, both LTI data and total hours worked should come from the same reporting period.
LTIFR RESULT
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LTIFR
Lost Time Injury Frequency Rate per 1,000,000 hours worked.
WHAT THIS MEANS
LTIFR normalizes the frequency of injuries that result in lost time from work. Enter your data to calculate the result.
Lost Time Injuries
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Total Hours Worked
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FORMULA
LTIFR = (Lost Time Injuries × 1,000,000)
÷ Total Hours Worked
÷ Total Hours Worked
The 1,000,000-hour base is commonly used for international LTIFR reporting.
1,000,000
Normalized comparison base
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IMPORTANT
Use consistent LTI definitions, workforce scope and verified working-hour data when comparing performance across periods or locations.
UNDERSTAND LTIFR
Understand and use LTIFR correctly
Reliable interpretation depends on consistent LTI definitions, reporting periods, workforce scope and working-hour data.
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Why 1,000,000?
The 1,000,000-hour base allows organizations of different sizes to compare injury frequency on a common scale.
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Which Cases Count?
Include only work-related cases classified as LTI under the applicable organizational or reporting standard. Definitions can vary.
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How to Interpret It?
Do not interpret a single LTIFR value in isolation. Compare trends, similar operations, industry data and historical reporting periods.
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BEST PRACTICES
✓Apply consistent LTI classification.
✓Verify total hours worked across workforce groups.
✓Analyze trends over time, not just a single value.
✓Use the metric to support improvement actions.
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BENCHMARKING TIP
Compare LTIFR with similar operations, the same industry, historical periods and your organization's own targets. Context and trend direction matter more than a single isolated value.
DISCLAIMER
This tool calculates LTIFR from the data provided. Always verify the LTI definition and reporting requirements used by your organization, client or applicable jurisdiction.
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