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Wage and Hour Division
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Wage and Hour Division (WHD)

Fixed Units With Variable Time - 9 Minutes Calculator

TIME PER UNIT - SET NUMBER OF UNITS - VARIABLE TIME - 9 MIN PD&F

Task Performed Observer Standard Setter Date Number of Units Completed (Should be the same for each time study) Time Elapsed
Hours Minutes Seconds Total
Number of Units in Standard
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Prevailing Wage
Piece Rate
Total Number of Units Completed
Total Seconds
Seconds Per Unit


For additional information regarding piece rates, please see Section 64i00 of the WHD Field Operations Handbook.

For additional information about incorporating Personal Time, Fatigue and Delay (PF&D) when determining a piece rate, please see Fact Sheet #39D and Section 64i01 of the WHD Field Operations Handbook.




The Department of Labor is providing these calculators as a public service. The regulations and related materials reflected in these calculators are intended to facilitate compliance with section 14(c) of the Fair Labor Standards Act and Department of Labor regulations. The calculators assist in determining the special minimum wages that may be paid by employers that receive a certificate from the Department of Labor to workers who have disabilities for the work being performed. These calculators, however, offer no assistance in determining whether the criteria for section 14(c) coverage are satisfied and may not be an appropriate tool for determining section 14(c) wages in every possible situation encountered in the workplace. These calculators provide a service that is continually under development. The user should be aware that, while we try to keep the information timely and accurate, there will often be a delay between official publication of new guidance or authority and their appearance in or modification of these calculators. Parties remain independently responsible for determining whether their wages are in compliance with federal law. Further, the conclusions reached by this system rely on the accuracy of the data provided by the user. Therefore, we make no express or implied guarantees. The Federal Register and the Code of Federal Regulations remain the official sources for regulatory information published by the Department of Labor. We will make every effort to correct errors brought to our attention.