Planning an outdoor event in Dallas means thinking about logistics, and one of the most important is restroom facilities. Having too few porta potties leads to long lines and unhappy guests. Having too many means unnecessary expense. Here's how to calculate the right number for your event.
The Basic Formula
For a standard 4-hour event without alcohol, the general guideline is 1 porta potty per 50-75 guests. This ratio accounts for average restroom usage and keeps wait times reasonable.
Factors That Increase the Number
Several factors may require you to add more units:
- Alcohol service: Events with beer, wine, or cocktails should use a ratio of 1 unit per 40-50 guests
- Longer duration: Add 1 unit for each additional 2 hours beyond 4 hours
- Mostly female attendance: Women take longer on average, so add 10-20% more units
- Food-heavy events: Barbecues and food festivals may need additional capacity
Event Type Guidelines
Different events have different needs:
- Weddings: 1 unit per 35-50 guests, or consider a luxury restroom trailer
- Corporate picnics: 1 unit per 50-60 guests for 4 hours
- Festivals: 1 unit per 75-100 attendees with regular servicing
- Backyard parties: 1-2 units for gatherings over 25 guests
Quick Reference
50 guests, 4 hours, no alcohol = 1 unit
100 guests, 4 hours, with alcohol = 2-3 units
200 guests, 8 hours, with alcohol = 6-8 units
Don't Forget ADA Units
Public events typically need at least one ADA-accessible unit. The general guideline is 1 ADA unit for every 20 standard units, but having at least one accessible option is important for any public gathering.
Get a Personalized Recommendation
Every event is different. For a specific recommendation based on your Dallas event details, give us a call. We'll help you determine the right number and type of units based on your guest count, venue, duration, and event style.