The Severity Rate looks at incidents in terms of the actual number of days that were lost on average. To calculate the Severity Rate, you simply divide the number of lost workdays by the number of recordable incidents.

What is meant by severity rate?

: the time lost through injuries as calculated in total days lost per 1000 hours worked.

How is accident severity rate calculated?

The severity rate is the total number of days lost or charged due to accidents per one million man-hours worked. Severity rate= days lost in a year due to accidents/number of man-hours worked x 1000,000.