LTIFR calculator
Calculate lost-time injury frequency rate from lost-time injury cases and actual employee hours.
Enter your values
Check this tool fits your task
One-million-hour LTIFR arithmetic. Establish LTI inclusion rules using your reporting scheme; this page does not decide recordability or replace a country-specific return.
Your result
Enter your values, or try the example to see how it works.
Calculation breakdown
What to do next
Method and sources
LTIFR = lost-time injury cases × 1,000,000 ÷ actual hours worked.
Safe Work Australia: measuring and reporting on WHS (LTIFR definition) ↗
How to use this tool
- Check the scope and collect measured or verified input values.
- Enter values using the displayed units, then calculate.
- Read the result, calculation breakdown and next steps together.
Worked example
2 lost-time injury cases × 1,000,000 ÷ 500,000 hours = 4.00 LTIs per million hours.
The example button fills illustrative values. Where a scope confirmation is shown, check it yourself before calculating.
Method and references
LTIFR = lost-time injury cases × 1,000,000 ÷ actual hours worked.
One-million-hour LTIFR arithmetic. Establish LTI inclusion rules using your reporting scheme; this page does not decide recordability or replace a country-specific return.
Common questions
Is LTIFR the same as TRIR?
No. The case definitions and normalising bases differ. Do not compare the values as equivalent scores.
What counts as a lost-time injury?
Apply the definition required by your reporting scheme consistently and document it.
Is a low LTIFR proof of good controls?
No. Review cases, exposure to hazards and other performance measures as well.
Public beta · Check the method and inputs with a competent reviewer before operational use.
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