How Many Porta Potties Do I Need?
Enter your head count and hours. The calculator applies our planning chart for events and OSHA Table D-1 for crews, then adds accessible units and hand-wash stations.
A person answers Mon–Sat, 7 AM–7 PM. Forms get a reply within one business hour.
Porta potty calculator
The porta potty calculator gives a total unit count, the minimum accessible units and the hand-wash stations for your event or crew. For events it uses 1 unit per 50 guests per 4 hours. For crews it uses OSHA Table D-1 and our 1-per-10-workers recommendation. Every step is shown under the result.
How the event chart works, with a worked example
The event chart gives 1 porta potty per 50 guests for every 4 hours. Multiply guests by hours and divide by 200, then round up. A 150-guest, 5-hour wedding is 150 × 5 ÷ 200 = 3.75, so 4 units. Because alcohol is served, add 1 unit for every 4, which makes 5 units.
- Base: guests × hours ÷ 200, rounded up. Minimum 1.
- Alcohol: add 1 unit for every 4 units from step 1 (at least 1).
- Accessible: at least 5% of units in each cluster, minimum 1, per 2010 ADA Standards §213.2.
- Hand washing: 1 station per 3 units with food, 1 per 5 without.
The event chart is our own planning method from North Country events. It is not a legal standard. Your venue or permit may require more.
How many porta potties does a work crew need?
A work crew of 20 or fewer needs at least 1 toilet under OSHA 29 CFR 1926.51(c). From 20 to 199 workers, the minimum is 1 seat and 1 urinal per 40. Farm crews need 1 toilet and 1 hand-wash station per 20 workers under 29 CFR 1928.110. We recommend 1 unit per 10 workers for a 40-hour week.
Official text: OSHA 1926.51 · OSHA 1928.110. Legal minimums are separate from our recommendation. Not legal advice.
Worked examples for common North Country rentals
Most North Country rentals fall into a few patterns. A 60-guest backyard graduation party for 4 hours needs 2 units. A 12-person framing crew needs 2 units serviced weekly. A 300-guest, 6-hour festival with beer and food needs 12 units, including 1 accessible, plus 4 hand-wash stations.
| Scenario | Math | Order |
|---|---|---|
| Graduation party, 60 guests, 4 h, no alcohol | 60×4÷200=1.2→2 | 2 units (1 accessible) + 1 hand-wash |
| Framing crew, 12 workers | 12÷10=1.2→2 | 2 units, weekly service, 1 hand-wash |
| Festival, 300 guests, 6 h, beer | 300×6÷200=9; +3 alcohol | 12 units incl. 1 accessible + 4 hand-wash |
| Farm harvest crew, 25 workers | 25÷20=1.25→2 | 2 units + 2 hand-wash within ¼ mile |
Sizing questions
How many porta potties do I need for 100 guests?
For 100 guests over 4 hours, you need 2 porta potties. For 8 hours, 4. If alcohol is served, add 1 more. Make 1 of them accessible for a public event.
How many porta potties for 200 people?
For 200 people over 4 hours, you need 4 porta potties. With alcohol, 5. Over 8 hours, 8, or 10 with alcohol. Add 2 hand-wash stations if food is served.
How many porta potties for 10 workers?
10 workers need 1 porta potty by OSHA’s minimum and by our recommendation, serviced weekly. Add a hand-wash station for the crew.
Do women need more porta potties than men?
Guests who use the seat take longer than urinal users. For events where most guests are women, such as bridal showers, add 1 unit to the chart total.
More answers: renter FAQ (38 questions) · full price guide · graduation party example
Fastest way to book
Order the right number of units
Tell us the address or ZIP, your dates and what the toilets are for. We send back an itemized quote with no add-ons later.
(315) 660-6075A person answers Mon–Sat, 7 AM–7 PM. Forms get a reply within one business hour.
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