Severity Rate Calculator

Lost Workday Rate (200,000 / 1,000,000 hour basis)

Reporting Basis (Multiplier)

Formula: Severity Rate = (Lost Workdays × 200,000) ÷ Total Hours Worked
Severity rate measures impact (days lost), while TRIR measures frequency (number of incidents).

Your Industry (for accurate benchmark comparison)

Total Lost Workdays (days away from work; OSHA caps each case at 180)

Total Hours Worked (all employees combined)

Number of Lost Time Incidents (optional — for average severity per case)

Please enter valid lost workdays and hours.

Your Severity Rate

0.00

Average severity per case

0.0

Source: U.S. Bureau of Labor Statistics, 2023-2024 SOII data (released January 2026); median DAFW = 8 days across all private industry.

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