How to Calculate Accident Injury Rates
The accident injury rate is the frequency of work-related accidents that result in personal injury within a company, privately owned business or organization. The rate measures the frequency of accidents by using a specific formula that is regulated by the Occupational Safety and Health Administration (OSHA). To calculate your business's accident injury rate, plug in some of your company statistics into OSHA's formula.
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Instructions
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Add together the total amount of work-related injuries and illnesses that have occurred at your company within the past year. This number is found on your Log of Work-Related Injuries and Illnesses (OSHA form 300). You can also look at your Summary of Work-Related Injuries and Illnesses (OSHA form 300A) and add together the sum of column H (cases with days away from work), column I (cases with job transfer or restriction) and column J (other recordable cases). For instance, if your company reported three work-related injury and illness cases that resulted in days away from work, one case that required a job transfer and five cases that were reported as "other," your company would have a total of nine work-related injuries and illnesses (3 + 1 + 5 = 9).
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Multiply the total amount of work-related injuries and illnesses by 200,000. If your company reported a total of nine work-related injury and illness cases, you would multiply the number nine by 200,000, which gives you the total of 1.8 million. The number 200,000 represents the equivalent of one hundred employees working forty hours per week and fifty weeks per year. This is the standard that OSHA uses.
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Divide that number by the total number of employee hours worked to calculate your company's accident injury rate. To calculate the total number of employee hours worked, add together all work hours that have been recorded by every single employee in your company within the past year. For instance, if your company has 200 employees, all of whom worked exactly forty hours per week for fifty weeks out of the year, your company would have 400,000 hours of employee hours worked (200 x 40 x 50 = 400,000). In this scenario, your company would have an accident injury rate of 4.5 (1,800,000 / 400,000 = 4.5).
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Tips & Warnings
An online calculator is available on the Bureau of Labor Statistics website, which automatically calculates your company's accident injury rate for you.
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