📉 LTIFR Calculator

Lost Time Injury Frequency Rate — lost-time injuries per million hours worked.

Number of lost time injuries (LTIs)

Total hours worked (all employees, the period)

Multiplier (exposure base)

LTIFR

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LTIFR = (Lost time injuries × multiplier) ÷ total hours worked. Compare only against rates using the same multiplier — a “per million hours” figure is five times a “per 200,000 hours” figure for the same performance.