How To Calculate LTIFR

Lost Time Injury Frequency Rate (LTIFR) is a valuable tool used by many companies to effectively measure how safe their workplace is or to see the efficiency of newly implemented safety schemes. Lost time injuries are injuries which have occurred in the workplace where an employee has been required to take time off afterwards to recover.

Calculating the frequency rate gives health and safety executives or business owners a key metric to track over time and compare within their particular industry.

LTIFR Calculator

To calculate the LTIFR for your workplace simply input the number of injuries sustained over a specific period of time and then input the total number of hours worked by all employees over that time period.

LTIFR Calculator
Rate (ususally 1000000):
Lost Time Injuries:
Total hours worked in that time frame:

Lost Time Injury Frequency Rate (LTIFR):

LTIFR is typically worked out per 1,000,000 hours although this figure is adjustable if required.

Example Of How To Calculate LTIFR

This figure is calculated by multiplying the number of LTIs by the standardised rate which, as mentioned above, is usually 1,000,000. This figure is then divided by the total number of hours that have been worked over the time period that the LTIs have been sustained. Here's an example:

Company A has suffered 7 lost time injuries in the last 3 months. The total amount of time worked over that time period is 1,342,938 hours.

LTIs x Standardised rate = 7 x 1,000,000 = 7,000,000

Above result divided by total number of hours worked = 7,000,000 / 1,342,938 = 5.21

Company A's LTIFR = 5.21 per 1,000,000 hours worked.

LTIIR Calculator


Another handy comparison tool is the Lost Time Injury Incident Rate (LTIIR) – this is a similar calculation to the LTIFR but looks at the number of days lost per employee rather than per hours worked.

LTIIR Calculator
Rate (usually per 10,000):
Lost Time Injuries:
Number of employees employed in that time frame:

Lost time injuries per


LTIIR is typically worked out per 100,000 workers although this figure is adjustable if required.

How Does Your Result Compare To Other Industries?

You can compare your LTIIR results over a period of time to see how you are performing and whether any implemented safety schemes have the desired affect. The below information has been collected from The Health and Safety Executive and can be used as a guide to see the injury rates in different industries:

  • 4,300
  • 3,080
  • 2,730
  • 2,600
  • 2,490
  • 2,430
  • 2,270
  • 2,180
  • 2,080
  • 1,630
  • 1,600
  • 1,400
  • 810
  • 620