Lost Time Injury Frequency Rate (LTIFR) Calculator

What is Lost Time Injury Frequency Rate (LTIFR)?

Lost Time Injury Frequency Rate (LTIFR) is a critical workplace safety metric that measures how often lost time injuries occur based on man-hours worked. It is used to track incidents that cause employees to miss work due to injury.

The formula to calculate LTIFR is:

LTIFR = (Number of Lost Time Injuries × 1,000,000) ÷ Manhours Worked

A higher LTIFR indicates a greater number of serious injuries, and a lower LTIFR shows better workplace safety standards and preventive measures. Many companies use LTIFR as a key safety KPI for management review and external compliance reporting.

Important Notes:

  • If the injury does not cause immediate loss of time but leads to absence later, it should be included in the LTIFR of the period when the absence starts.
  • For injuries causing intermittent work loss, it should be counted only once at the first occurrence of time loss.
  • LTIFR is commonly used for both internal safety comparisons and statutory reporting to regulatory authorities.

Lost Time Injury Frequency Rate Calculator

Use this free LTIFR calculator to instantly measure your site's or company's lost time injury frequency rate:

Result:

Your result will appear here

Why Tracking LTIFR is Important?

  • Regulatory Compliance: Required for OSHA, ISO 45001, and many national laws.
  • Management Oversight: Helps leadership monitor site safety performance easily.
  • Incident Prevention: Identifies safety weaknesses to prevent recurrence of lost time injuries.

How to Reduce Lost Time Injury Frequency Rate?

  • Conduct thorough incident investigations and root cause analyses.
  • Provide regular safety training and toolbox talks.
  • Ensure strict use of Personal Protective Equipment (PPE).
  • Implement effective permit-to-work systems and safe work practices.

Reducing LTIFR strengthens your safety reputation and boosts worker confidence in the workplace.

Related Resources:

Conclusion

Monitoring your Lost Time Injury Frequency Rate (LTIFR) is a crucial step towards achieving a safer and healthier workplace. Use our free LTIFR calculator today and build a culture of safety excellence!

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Lost Time Injury Frequency Rate (LTIFR) Calculator