Porta Potty calculator
Use the calculator below to estimate how many portable restroom units you need
for your next outdoor wedding, special event, or construction project.
Use the calculator below to estimate how many portable restroom units you need for your next outdoor wedding, special event, or construction project.
Number of shifts
Each restroom comfortably serves up to 10 workers over a standard 40-hour workweek.
2 unit(s) recommended
Estimate only — final quote may vary.
How we estimate this
For events, we start from roughly 1 unit per 50 attendees for a 4-hour event, scale up for longer events, add capacity when the crowd skews more than 50% women (restroom visits tend to run longer), and add about 15–20% more units if alcohol will be served. We also recommend 2–3 handwashing stations for every 10 units needed. Every job is different, so treat this as a starting point, not a final quote.
Event Estimation Rules
Guest Baseline
1 unit per 50 guests for events up to 4 hours. Add more units if the event lasts 6, 8, or 10+ hours.
Alcohol Factor
Add 15% to 20% more units if alcohol is served because guests drink and use the restroom more often.
ADA Units
Provide at least 1 handicap-accessible unit, or 1 for every 20 standard units at public events.
Handwashing
Add 1 handwash station for every 4 portable toilets, especially near food service areas.
Construction Site Rules
Worker Baseline
OSHA requires at least 1 toilet for up to 20 workers, and standard industrial guidelines recommend 1 per 10 workers for standard 40-hour workweeks to minimize wait times.
Extended Shifts
Increase the number of units if shifts run longer than 8 hours or if the crew size scales up mid-project.
NOT SURE WHERE TO START?
Tell us about your event or job site, and we’ll get back to you with pricing and availability – usually the same day.
Frequently Asked Questions
Our calculator uses industry standards based on your event or job site specifications. For events, it factors in guest count, duration, and whether alcohol is served. For construction sites, it uses worker headcount and shift lengths aligned with OSHA standards.
The calculator gives you a solid baseline based on industry standards and the rules shown above. Final quotes may vary based on factors like event duration, site accessibility, and special requests, but it’s accurate enough to plan your budget and get started. We’ll nail down the exact count when you request a quote.
As a baseline, we recommend 1 standard portable unit for every 50 guests for an event lasting up to 4 hours.
Alcohol consumption increases restroom usage. Serving alcohol requires adding 15% to 20% more portable units to keep wait times low and avoid long lines.
Events lasting longer than 4 hours (such as 8, 12, or 24-hour events) require additional units to account for higher volume. For construction sites with extended shifts or continuous work, increasing unit counts or adding extra weekly servicing prevents overflow.
We recommend adding 1 standalone handwashing station for every 4 standard portable toilets, particularly if your event features food vendors, food trucks, or dining areas.
Hand washing stations are add-ons priced separately. The calculator factors them into your count per our sanitation guidelines, but they’re optional depending on your event type and budget. We’ll detail costs in your quote.
Yes. We carry standard units, deluxe units with flushes and sinks, and VIP-style restroom trailers for upscale events. The calculator estimates standard units. Request a quote to explore premium options.
For public events, guidelines recommend at least 1 ADA-compliant handicap-accessible unit for every 20 standard units, or 1 per event minimum. ADA units are wheelchair accessible and provide extra floor space and grab bars for safety.
OSHA regulations require a minimum of 1 toilet facility for sites with 1 to 20 workers. For crews of 20 to 190 workers, OSHA requires 1 toilet and 1 urinal per 40 workers, and 1 per 50 workers for crews over 200.
Standard construction rentals include weekly servicing, which covers pumping, cleaning, sanitizing, and restocking toilet paper and supplies. Additional service visits per week can be scheduled for larger crews or high-traffic projects.
Units must be placed on level, solid ground accessible by our service trucks (within 30 feet of where the truck can park) for drop-off, pickup, and routine pumping.
Standard portable toilets and handwashing stations are fully self-contained and require no utility connections. Restroom trailers perform best when connected to a standard garden hose (water) and standard electrical outlets, but freshwater tanks and power generators can be supplied if utilities are unavailable on-site.
Doodie Calls provides portable restroom, restroom trailer, and disaster relief sanitation services in Florida, Texas, Georgia, and Louisiana, with nationwide reach for disaster relief response.
While we can often accommodate last-minute or same-day requests depending on local inventory, booking 1 to 2 weeks in advance is recommended for large events or special equipment like ADA units and luxury trailers.
We deliver and pick up at your scheduled dates and times. Delivery fees vary by location and unit type. We’ll confirm logistics and costs once you submit your quote request.
Our units are built for all-weather use, but severe conditions may affect service frequency or placement. Winter rentals, for example, need extra attention. Mention weather concerns in your quote request, and we’ll plan accordingly.
Yes. Festivals, multi-site construction projects, and sprawling venues are fair game. Describe your setup in the quote request, and we’ll coordinate delivery and service across all locations.
We understand plans shift. Reach out as soon as your dates or needs change, and we’ll work with you on rescheduling or adjustments. Call us at 844-444-POOP (7667) to discuss.
That’s what we’re here for. The calculator is a starting point. Fill it out, request a quote, and our team will review your event or site details and make a recommendation. We’d rather you have enough than scramble halfway through.
