Construction Porta Potty Calculator

How Many Porta Potties For Construction Sites?

The number of porta potties required at a construction site depends on several factors, including the size of the workforce  and the project duration. A general guideline is to have one porta potty for every 10 workers for a 40-hour workweek. However, specific projects may have additional needs based on crew size fluctuations and the presence of subcontractors.

Prime Dumpster’s porta potty calculator for construction sites takes into account these variables to recommend the precise number of units you’ll need, ensuring your site remains productive, compliant, and comfortable for all workers.

Construction Porta Potty Calculator

In accordance with the American National Standards Institute's Standard Z4.3, restrooms must be located no more than 200 feet or 60 meters from the primary workspaces, considering a work schedule of 8 hours a day and 40 hours a week.


For long-term projects or those that significantly change in scope, we recommend periodic reassessment of your porta potty needs to ensure continued compliance and satisfaction.

Service frequency depends on usage and the number of units on site. Generally, porta potties should be serviced at least once a week, but more frequent service may be necessary for larger sites or in hot weather. Our team can help schedule regular servicing to maintain cleanliness and usability.

Weather conditions can significantly impact the number and type of porta potties you may need on a construction site. In extreme heat, workers consume more liquids, potentially increasing the usage frequency of the facilities, which might necessitate additional units or more frequent servicing to maintain hygiene and comfort. Conversely, in colder climates, you might consider units with insulated walls or built-in heating elements to ensure comfort. Our porta potty calculator takes into account the basic needs based on crew size and project duration, but we recommend consulting with our team for advice on adjustments for specific weather conditions to ensure your site is well-equipped year-round.

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