1. What is Lost Time Injury Rate?

Lost Time Injury Rate (LTIR) is a safety metric that measures the number of lost time injuries per 200,000 hours worked. It helps organizations track and improve workplace safety performance.

2. How Does the Calculator Work?

The calculator uses the LTIR formula:

Where:

• Lost Time Injuries — Number of injuries resulting in time away from work
• Hours Worked — Total hours worked by all employees during the period
• 200,000 — Base for 100 full-time workers (50 weeks × 40 hours × 100 workers)

Explanation: The formula standardizes injury rates across organizations of different sizes for meaningful comparison.

3. Importance of LTIR Calculation

Details: LTIR is a key performance indicator for workplace safety. It helps identify safety issues, track improvement over time, and benchmark against industry standards.

4. Using the Calculator

Tips: Enter the number of lost time injuries and total hours worked. Both values must be valid (injuries ≥ 0, hours > 0).

5. Frequently Asked Questions (FAQ)

Q1: What constitutes a lost time injury?
A: Any work-related injury that results in an employee being unable to work their next scheduled shift or requires time off beyond the day of injury.

Q2: Why use 200,000 hours as the base?
A: This represents 100 employees working 40 hours per week for 50 weeks per year, providing a standard baseline for comparison.

Q3: What is a good LTIR value?
A: Lower values indicate better safety performance. Industry benchmarks vary, but generally values below 1.0 are considered good, while values above 4.0 may indicate safety concerns.

Q4: How often should LTIR be calculated?
A: Typically calculated monthly, quarterly, and annually to track trends and identify seasonal patterns or the impact of safety initiatives.

Q5: Are there limitations to LTIR?
A: LTIR doesn't capture near-misses or minor injuries, and can be influenced by reporting practices. It should be used alongside other safety metrics.