How many porta potties do I need for an event?
Start with 1 unit per 50 guests for an event of up to 4 hours. Add 1 unit per extra 2 hours for every 100 guests, then add about 15 percent if alcohol is served. Include at least 1 ADA accessible unit and 1 hand wash station per 3 to 4 units. Call 1-833-520-0680 and we will size it with you.
Who is this unit for?
Festivals, fairs and community events- Running races, cycling events and marathons
- Block parties and neighbourhood gatherings
- Concerts and outdoor performances
- Sports tournaments and school events
What are the specifications?
| Spec | Detail |
|---|---|
| Base ratio | 1 unit per 50 guests, up to 4 hours |
| Duration adjustment | 1 unit per extra 2 hours per 100 guests |
| Alcohol adjustment | Add about 15 percent |
| ADA units | About 5 percent, minimum 1 |
| Hand wash stations | 1 per 3 to 4 units |
| Delivery | Clean and stocked, collected after |
How do the event ratios work?
Take the guest count, divide by 50, round up. That is the base for an event up to four hours. For each additional two hours, add one unit per 100 guests, because the same doors have to absorb more visits. Then add roughly 15 percent if alcohol is served.
A worked example: 300 guests, six hours, beer and wine. Base is six units. Two extra hours adds three. That is nine, times 1.15 for alcohol, which rounds up to eleven. Add one ADA unit and four hand wash stations.
Why does the event type matter as much as the number?
Because peaks differ. A festival crowd moves through steadily all day. A seated dinner or a sports event breaks all at once, and the whole crowd arrives at the units within ten minutes.
If your event has a defined break, round the count up rather than down. The ratio describes average demand, and a simultaneous break is not average.
Where should the units go?
Two or three banks across the site rather than one row. A single bank produces a single long queue, and guests on the far side of the site will not walk to it.
Position them downwind of food service but still clearly visible. Hidden units create congestion at whichever ones people can find, which looks like a capacity problem but is a signage and placement problem.
What about lighting?
Plan for it on anything running past dusk. Most units have a translucent roof panel for daylight only, so after dark they are unusable unless the surrounding area is lit.
String lighting or a work light on the bank is inexpensive and prevents the most common complaint at evening events.
How many hand wash stations?
One per three to four units for general events. Move to one per two where food is served or where children make up a large share of the crowd.
Place them on the exit path from the units. If guests walk past a station on the way out, most will use it.
How does booking work?
Call with the headcount and dates
We connect you with a local provider. Tell them whether workers or guests will be using the units.
Confirm the count and the schedule
The provider sets the unit mix, the servicing frequency and the placement, then quotes the whole rental.
Delivery, servicing and collection
Units arrive clean. The service truck keeps to the agreed schedule, and collection is on the end date.
What does it cost?
| Market type | Typical range |
|---|---|
| One day, major metro | $150 to $275 |
| One day, mid size city | $130 to $240 |
| One day, smaller market | $120 to $220 |
What is inside the unit?
Included
- Molded seat with a self closing lid
- Urinal for faster turnover
- Toilet paper holder, stocked at delivery
- Hand sanitiser dispenser
- Translucent roof panel for daylight
- Internal latch with an occupied indicator
Servicing schedule
Single day event delivered clean and stocked, collected after. No mid event service unless requested.- Multi day event nightly servicing between sessions is standard.
- Mid event available on request for events running more than about 8 hours.
Fittings vary slightly between manufacturers. Your provider confirms what the specific unit includes and how often it will be serviced.
Where should the unit go?
Spread units into two or three banks across a large site rather than one long row. Walking distance drives usage more than the total count does, and a single bank creates one long queue instead of three short ones.
A standard unit occupies roughly 4 by 4 feet with the door opening outward, so allow about 5 by 5 feet of clear space. The service truck needs to get within about 25 feet of the unit, which is the constraint that decides most placement questions.
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Guides
Event Porta Potty questions
How many porta potties for 200 guests?
Four units for an event of up to 4 hours. For a 6 hour event, add 2 more, and add about 15 percent on top if alcohol is served.
Does alcohol really change the count?
Yes. People use the restroom noticeably more often when drinking, and the usual allowance is about 15 percent extra units.
Do I need an ADA unit at a public event?
Yes, in practical terms. Accessible facilities are expected under the 2010 ADA Standards wherever the public can attend. Order at least one.
Will units be serviced during the event?
Not on a single day event unless you ask. Multi day events normally get nightly servicing between sessions.
How far in advance should I book?
Two to four weeks suits most events. Peak festival and wedding weekends book out much earlier, so reserve as soon as the date is set.
Are urinal only units worth it?
On large male heavy crowds, yes. They cut queues significantly for less than the cost of additional full units. Ask the provider about the mix.
Who wrote this page
Written and fact checked by the Dumpster Porta Potty USA editorial team. We check container sizes, servicing intervals and price ranges against published provider rate sheets and federal guidance, then update the page when those change.
Last updated . Read our editorial policy.
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