Occupational Safety, Health, and Environmental (OSHE) BlogOccupational Safety, Health, and Environmental (OSHE) BlogSeverity Rate Calculator
Workplace Injury Impact Tool
Calculate Severity Rate to measure the impact of workplace injuries and assess the severity of safety incidents for comprehensive workplace safety management.What is Severity Rate?
Severity Rate is a safety metric that measures the impact of workplace injuries by calculating lost workdays per million hours worked.
It helps organizations understand the severity of safety incidents and assess the effectiveness of injury prevention and management programs.
Severity Rate Formula
Severity Rate =
(Total Lost Workdays × 1,000,000)
Total Hours Worked
Industry Benchmarks
Excellent< 50.0
Good50.0 - 100.0
Average100.0 - 200.0
Needs Improvement> 200.0
Important Notes
Lost workdays include all days away from work due to workplace injuries or illnesses
Include both temporary and permanent disability cases in the calculation
Use consistent time periods for accurate trend analysis
Investigate high severity incidents to prevent future occurrences