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Mitratech Success Center

HSE Rate Formulas

The table below contains HSE formula configurations for frequency rates. Please review the table's key for any confusion regarding the formulas.

Considerations:

  • In the US, the standard is 200,000
  • In Australia, the standard is 1,000,000

HSE Rate Formula Index

Rate Formula
# of Total Recordable Cases Other Recordables + Restricted Duty Cases + Lost Time Cases + Fatalities
# of Total Incidents Total Recordable Incidents + No. of First Aid Cases + No.of Near Misses 
# of Total Injury / Illness Cases Total Recordable Incidents + No. of First Aid Cases
# of DART Cases Restricted Duty Cases + Lost Time Cases
First Aid Case Incident Rate # of Injury First Aid * 20,000 / Total Hours Worked
Other Recordables Incident Rate # of Injury Other Recordables * 200000/Total Hours Worked
Restricted Duty of Incident Rate # of Injury Restricted Duty Cases  * 200000/Total Hours Worked
Lost Work Day Incident Rate # of Injury Lost Time Cases  * 200000/Total Hours Worked
DART incident Rate # of Injury Lost Time & Restricted Duty Cases  * 200000/Total Hours Worked
Recordable Incident Rate # of Injury Recordables * 200000/Total Hours Worked
Restricted Days Incident Rate # of Restricted Days * 200000/Total Hours Worked
Lost Days Incident Rate # of Lost Days * 200000/Total Hours Worked
Total Restricted and Lost Days Incident Rate 
(Also Known As: Days Away/Restricted Transfer Days Rate)
# of Restricted & Lost Days * 200000/Total Hours Worked
Ratio of Near Miss to Injury/Illness Incidents ((Total # of Near Misses) / (Total Number of Injury / Illness Incidents))
Injury Experience Analysis {([Total Other Recordables * 1] + [Total Restricted Duty Cases * 2] + [Total Lost Time Cases * 5]) * 200,000} / Total Hours Worked
Frequency Severity Index Square Root of (Lost work Day Case Rate * Lost Work Day Day Rate / 1000)
New Injury Frequency (Recordable cases + First Aid Cases)*1,000,000 / Total Hours Worked
Severity Index Total Lost Work Days * 200000/Total Hours worked
Safety Index Lost Workday Case Rate + Total Recordable Case Rate + Lost Workday Day Rate
Injury Frequency (also known as: Injury Frequency Index) Lost Time cases + Restricted Duty Cases + Death/Fatality Cases + Other Recordable Cases * 200000/Total Hours Worked
Injury Severity Total Lost Work Days Cases * 200,000 / Total Hours Worked

 

Key:

+ add

- subtract

* multiply

/ divide

 

 

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