Find out how many workdays are lost as a result of injury or illness with the Lost Day Workday (LWD) Rate Calculator. Unlike the Lost Time Incident Rate, which determines the number of cases contributing to lost time, the Lost Workday Incident Rate takes into account the specific number of days lost to an injury or illness. Use this rate to evaluate existing safety programs, plan for new safety training, or setting a safety benchmark.

All you need to calculate Lost Workday Rate is your OSHA 300 log. Simply enter the number of days lost to injury or illness and plug in the total number of hours worked by all employees to find your facility’s Lost Workday Rate – the rate of days lost on average for every 100 employees.

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What's next?

OSHA has simplified its incident rate calculations and replaced the Lost Workday Rate with Days Away, Restricted, and Transferred (DART) Rates. In an effort to improve the accuracy of incident reporting, this new metric takes into account all work time that is lost, not just the work days. If you want a more comprehensive overview of safety performance, your next step is to determine the DART Rate for your facility. Calculating DART will help you better evaluate your organization’s safety efforts and avoid surprise OSHA inspections.

Although OSHA no longer recognizes the term “lost workday” for recordkeeping purposes, it can be beneficial for safety managers and employers to monitor Lost Workday Rate. You may not even realize how many days your company is losing to accidents; understanding the true cost of safety is key to effectively improving safety programs. Lost days of work directly cost the company medical bills and worker’s compensation, but the indirect costs, like OSHA fines, decreased productivity, hiring and training a new employee, etc. can cost an organization much more.


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