1. What is the Lost Time Injury Rate (LTIR)?

The Lost Time Injury Rate (LTIR) is a safety metric used to measure the number of lost time injuries occurring per 200,000 hours worked. It provides a standardized way to compare injury rates across different organizations and industries.

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 (40 hrs/week × 50 weeks/year)

Explanation: The formula standardizes the injury rate to equivalent of 100 employees working full-time for one year, allowing for meaningful comparisons across organizations of different sizes.

3. Importance of LTIR Calculation

Details: LTIR is a key performance indicator for workplace safety programs. It helps organizations track safety performance, identify trends, benchmark against industry standards, and prioritize safety improvements.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What constitutes a lost time injury?
A: A lost time injury is any work-related injury that results in an employee being unable to return to work for their next scheduled shift.

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

Q3: How often should LTIR be calculated?
A: LTIR is typically calculated monthly, quarterly, and annually to track safety performance trends over time.

Q4: What is considered a good LTIR?
A: Lower LTIR values indicate better safety performance. Industry benchmarks vary, but generally an LTIR below 2.0 is considered good, while below 1.0 is excellent.

Q5: How does LTIR differ from other safety metrics?
A: LTIR focuses specifically on injuries resulting in lost work time, while other metrics may include recordable incidents, near misses, or first aid cases.