Porta potties needed for events
| Guests | 4 hours | 8 hours |
|---|---|---|
| Up to 50 | 1 unit | 2 units |
| 100 | 2 units | 3 units |
| 250 | 5 units | 8 units |
| 500 | 10 units | 15 units |
| 1,000 | 20 units | 30 units |
Add 20 percent for alcohol. Add one hand-wash station for every two or three units near food.
Porta potties needed for weddings
| Guests | Deluxe units | ADA units | Hand-wash |
|---|---|---|---|
| Up to 75 | 1 | 1 | Optional |
| 100 | 2 | 1 | 1 |
| 150 | 2 | 1 | 1 |
| 200 | 3 | 1 | 2 |
| 250 | 4 | 1 | 2 |
Porta potties needed for construction sites
| Workers on site | Minimum toilets |
|---|---|
| 1 to 20 | 1 toilet |
| 20 to 199 | 1 toilet seat and 1 urinal per 40 workers |
| 200 or more | 1 toilet seat and 1 urinal per 50 workers |
Source: OSHA standard 1926.51(c)(1). With weekly service, one unit per 10 workers is the comfortable number.
Things that raise the count
- Alcohol or lots of drinks
- Events longer than four hours
- Hot weather
- Many children or older guests
- A crowd that arrives all at once, such as intermission or halftime
- Units spread across a large site
Unit count questions
How many porta potties do I need for 100 guests?
Two units cover a 4-hour event for 100 guests. Plan three units for an 8-hour event or when alcohol is served.
How many porta potties do I need for 200 guests?
Four units cover a 4-hour event for 200 guests. Add one or two more for longer events or an open bar, and make one of them ADA accessible.
How many porta potties do I need for 500 people?
Ten units cover a 4-hour event for 500 people, and about 15 cover 8 hours. Add hand-wash stations near food areas.
How many workers can share one porta potty?
About 10 workers can share one unit comfortably with weekly service. OSHA allows one toilet for up to 20 workers as a minimum.
Should I count children at my event?
Count everyone who will be there at the busiest time, including children. Kids use restrooms often, so a family event may need one extra unit.