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Lost Time Injury Frequency Rate (LTIFR)
HSE
Lost Time Injury Frequency Rate (LTIFR) measures the number of lost time injuries occurring per one million manhours worked. It is one of the most widely used safety performance indicators in construction, oil & gas, and industrial projects.
Definition
Lost Time Injury Frequency Rate (LTIFR) measures the number of lost time injuries occurring per one million manhours worked. It is one of the most widely used safety performance indicators in construction, oil & gas, and industrial projects.
Formula
(LTI × 1,000,000) / Total Manhours
Explanation of Variables
LTI = Number of Lost Time Injuries
Manhours = Total hours worked
Manhours = Total hours worked
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Result: —
Worked Example
LTI = 2
Manhours = 500,000
LTIFR = (2 × 1,000,000) / 500,000 = 4.0
Manhours = 500,000
LTIFR = (2 × 1,000,000) / 500,000 = 4.0
Industry Use Case
Used to track safety performance and benchmark against industry standards.
Related Formulas
Total Recordable Incident Rate(TRIR)
HSE
TRIR measures the number of recordable incidents per 200,000 manhours worked. It includes all OSHA recordable cases.