LTIFR Calculator (Lost Time Injury Frequency Rate)

LTIFR Calculator

Formula: LTIFR = (Lost Time Injuries × 1,000,000) ÷ Total Hours Worked
Enter the values below and click Calculate LTIFR.

Lost Time Injuries (LTI) Total Hours Worked

Result will appear here.

How to use: enter the number of LTIs (whole number) and the total man-hours for the period, then click Calculate. Example: 3 LTIs, 28,800 hours → LTIFR = (3 × 1,000,000) ÷ 28,800 = 104.17

How to Use This Calculator

Tell your visitors:

1. Enter the number of Lost Time Injuries (LTI)

This is the number of injuries where an employee was unable to work at least one full shift/day.

Example:
If 3 workers had LTIs → enter 3

2. Enter the Total Hours Worked

This is the total man-hours worked by all employees in the chosen period.

Example:
If 120 workers worked 8 hours/day for 30 days:
120 × 8 × 30 = 28,800 hours

3. Click “Calculate LTIFR”

The calculator will instantly show:
How many LTIs occurred per 1,000,000 working hours.