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How Many Units You Need For Your Jobsite

When you’re on the job, Potty Pros understands that the last thing you need to worry about for your crew is their portable sanitation needs. Our convenient construction calculator can help estimate how many porta-potty units are needed for your construction site or long term rental.

Simply input the number of employees on your site, and our calculator will estimate the number of clean, well-maintained portable toilet units needed based on an eight hour day and forty hour workweek.

Once you have your estimated number, contact us for a quote today! Our friendly representatives are happy to help.

*According to Standard Z4.3 of American National Standards Institute
Toilets should be placed within 200 feet/60 meters of actual work area.
Based on 8 hour day/40 hour work week.


Number of Units: 1

Helpful Hints and Information

Yes, someone studied it. How many portable toilets are necessary for various kinds of job sites? Generally contractors provide a minimum number of sanitation facilities to meet basic needs and satisfy OSHA requirements. However, a break-even point can be determined up to which each additional unit earns for the contractor a return high enough to pay for itself. To determine that break-even point, the PSA National Health Committee commissioned the Center for Business and Industrial Studies, University of Missouri – St. Louis, to study four different types of construction sites: home, utility, high-rise, and highway.

Taken into consideration were the varying requirements of each site, the number of workers, and placement of portable toilets. One additional toilet was installed at each job site. In measuring the economic effect, workers hourly wages and benefits were factored in, along with hourly rates for equipment costs and subcontractor costs. Placement of the facilities and optional accessibility were surveyed.

With basic costs established, direct savings can be measured using four different methods: time savings, distance savings, net-cost savings, and savings as a percentage of cost.

Time saved by installing one additional unit on each of the four sites thus reducing the length of time workers waste waiting for a unit to become available or walking to a unit amounted to an average of 15 minutes per worker per day. The average savings as a percentage of direct cost was 600%. In addition to direct cost savings, indirect benefits were also realized.

Some of the indirect benefits were

  • With reduced travel time to and from facilities, workers saved valuable break time.
  • Additional and easily accessible facilities increased the cleanliness of the work environment.
  • Workers did not have to work in an uncomfortable state.

To realize these direct and indirect benefits requires correct placement of toilets for ease of access by all workers. Each group of seven or more workers on a work site should have at least one toilet placed within 100 feet of a central location