Accident frequency rate calculator
Calculate a frequency rate for new occupational injury cases using a fixed one-million-hour basis.
Enter your values
Check this tool fits your task
Use new injury cases under your defined recording scope. This broader numerator differs from LTIFR’s lost-time subset. This is not an accident-per-worker incidence rate.
Your result
Enter your values, or try the example to see how it works.
Calculation breakdown
What to do next
Method and sources
Frequency rate = new occupational injury cases × 1,000,000 ÷ hours worked. Match the numerator and denominator populations.
ILOSTAT: occupational injury statistics resolution, comparative measures ↗
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
6 new injury cases × 1,000,000 ÷ 750,000 hours = 8.00 cases per million hours.
The example button fills illustrative values. Where a scope confirmation is shown, check it yourself before calculating.
Method and references
Frequency rate = new occupational injury cases × 1,000,000 ÷ hours worked. Match the numerator and denominator populations.
Use new injury cases under your defined recording scope. This broader numerator differs from LTIFR’s lost-time subset. This is not an accident-per-worker incidence rate.
Common questions
Do I enter accidents or injured people?
Count injury cases under your recording rules. One event can produce more than one injury case; keep that distinction explicit.
Can I compare this with LTIFR?
Only after aligning case definitions. LTIFR normally restricts the numerator to lost-time cases.
Why not multiply by 100,000?
This version deliberately uses one million hours. Other schemes use other bases; label and compare like with like.
Public beta · Check the method and inputs with a competent reviewer before operational use.
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