Injury Frequency Rate

Last updated: December 4, 2017

What Does Injury Frequency Rate Mean?

An injury frequency rate is the number of injuries per 1,000,000 employee-hours worked. It is an indicator of the state of health and safety at a workplace. It provides an idea about the organization’s efforts to protect the workers from work related hazards.

Injury frequency rate can be calculated by the following formula:

Injury frequency rate = (Number of injuries in the period × 1,000,000) / Number of hours worked in the period

Safeopedia Explains Injury Frequency Rate

Injury frequency rate data is used by various departments and organizations to estimate the organizational performance on safety, and to formulate policies and programs for injury preventions.



Medically Treated Injury Frequency Rate (MTIFR)

All Injury Frequency Rate (AIFR)

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