1. What is Lost Time Injury Rate?

The Lost Time Injury Rate (LTIR) is a safety metric that shows the number of lost time injuries occurring per 200,000 work hours (equivalent to 100 employees working 40 hours per week for 50 weeks).

2. How Does the Calculator Work?

The calculator uses the LTIR formula:

Where:

• Lost Time Injuries — Injuries resulting in time away from work beyond the day of injury
• 200,000 — Base for 100 employees working full-time
• Total Hours Worked — Sum of all hours worked by all employees during period

Explanation: The rate standardizes injury data to allow comparison between organizations of different sizes.

3. Importance of LTIR Calculation

Details: LTIR is a key occupational health and safety indicator used to benchmark safety performance, identify trends, and measure the effectiveness of safety programs.

4. Using the Calculator

Tips: Enter the number of lost time injuries and total hours worked during the reporting period. The calculator will compute the standardized rate.

5. Frequently Asked Questions (FAQ)

Q1: What counts as a lost time injury?
A: Any work-related injury that results in an employee being unable to work their next regularly scheduled work day.

Q2: What's a good LTIR?
A: Lower is better. Industry averages vary, but many organizations aim for LTIR < 1.0.

Q3: How does LTIR differ from TRIR?
A: TRIR (Total Recordable Incident Rate) includes all recordable injuries, while LTIR only includes those with lost work time.

Q4: What time period should be used?
A: Typically calculated annually, but can be calculated for any period (quarterly, monthly, etc.).

Q5: Why use 200,000 hours?
A: It represents 100 employees working 40 hours/week for 50 weeks/year, providing a standard baseline.