How Many Porta Potty
Units Do You Need?

The industry standard is 1 unit per 50 guests for every 4 hours. For a 4-hour event with 200 guests, that's 4 units. Add 25–35% more if alcohol will be served, and add at least 1 ADA-accessible unit for public events. Our event calculator above handles the math automatically as you adjust your guest count and event length.

OSHA Standard 1926.51 sets the minimum for construction sites: 1 unit for up to 20 workers, 1 unit per 20 workers above that. In practice, the widely accepted guideline used by compliance officers is 1 unit per 10 workers per 8-hour shift, which provides a practical buffer. Units must also be maintained in a sanitary condition — which is why regular servicing isn't optional. We include scheduled pumping and restocking on all long-term rentals.

Yes — this is one of the most common planning mistakes. When alcohol is served, restroom usage increases by 30–50%. The industry recommendation is to add at least 25–35% to your baseline count. If your event calculator shows 4 units for a 200-person event, plan for 5–6 when serving drinks. Under-estimating this is the fastest way to create a bad guest experience.

ADA-accessible units are required for most public-facing events and construction sites where workers with disabilities may be present. Our XLT Wheelchair-Accessible Porta Potty is 50% larger than a standard unit, with a wide-stance base, interior handrails, and full compliance with ADA requirements. We recommend at least one ADA unit on any job site or event of any size.

For standard orders of 1–4 units, 48–72 hours is typically plenty. For larger events or 10+ units, 1–2 weeks ahead is safer. We also offer same-day delivery on qualifying orders placed before noon — no premium pricing, no hassle. Check real-time availability when you get your price online.

Simple — go to book.pottysplus.com. You'll see your exact, all-in price based on unit type, quantity, rental length, and your delivery location. No account required, no waiting for a callback, no hidden fees added at checkout. Most customers have their price and order confirmed in under 2 minutes. Volume discounts apply automatically for larger orders.