Porta Potty Calculator

Standard units form the foundation of most portable restroom setups, handling the bulk of usage at construction sites and outdoor events.
Plan for 1 unit per 20 workers on a construction site or 1 unit per 50 guests at a general outdoor event. If alcohol will be served, add 15 to 20 percent more units to your total count.

ADA-compliant units are required at most public events, government projects and workplaces, such as construction sites.
A common guideline is 1 ADA unit per 20 standard units, though some events and venues may have stricter requirements.

Deluxe flushing units are typically used to upgrade a portion of your overall unit count rather than replace standard units entirely.
For weddings and upscale events, consider making 25 to 50 percent of your units deluxe flushing models to improve the overall guest experience. For construction sites, one or two deluxe units per crew of 20 to 40 workers is a reasonable starting point.

Units with built-in sinks are most commonly used in food service areas, at family events, and on sites where hygiene compliance is a priority.
A general guideline is 1 sink unit per 2 to 3 food service stations or per 50 to 75 guests at events where handwashing access is important. They can also supplement or replace standalone handwashing stations when space is limited.

Handwashing stations are designed to complement portable restrooms rather than replace them, and most providers recommend 1 station per 7 portable restroom units as a baseline.
For food service areas or events with strict hygiene requirements, additional stations near food preparation and serving areas are advisable. Construction sites serving 20 or more workers typically benefit from at least one dedicated handwashing station on site.

A 2-stall trailer can serve up to 125 to 150 guests at a 4-hour event, while a 4-stall trailer can accommodate up to 300 guests. For larger events, a combination of trailers and standard units often provides the best balance of comfort and capacity.