How Many Porta Potties Do I Need?
Enter your guest count, hours and whether food and alcohol are served. You get a unit count, accessible units and hand-wash stations in seconds.
- Same-day by 1 p.m.
- Weekly cleaning included
- No fuel or card fees
The 5 things you need to know, answered
- Delivery area
- Any number of units, from 1 to 40, delivers to Tulsa and towns up to about 80 miles out.
- Arrival
- Book 3–7 days ahead for weekends, and 2–4 weeks ahead for 5 or more units.
- Which unit
- Start with 1 standard unit per 50 guests for 4 hours, then add for longer events and alcohol.
- Cleaning
- Events over 2 days can add a mid-event cleaning so units never hit capacity.
- Full cost
- Count sets the total; your quote lists every unit, delivery, pickup and tax line.
Talk to a real dispatcher who can see today's routes. Quotes take about 3 minutes.
Call now(918) 217-1414How many porta potties do I need for my guest count?
Plan 1 standard porta potty per 50 guests for an event up to 4 hours, then round up. Add 1 unit per 100 guests if the event runs longer than 4 hours, and 1 more per 100 guests when alcohol is served. Use the calculator below to run your own numbers.
Porta potty calculator
3 base + 2 for 6+ hours + 2 for alcohol. Make 1 wheelchair-accessible. Add 2 hand-wash stations for food.
Method: 1 unit per 50 guests up to 4 hours, +1 per 100 guests for longer events, +1 per 100 guests when alcohol is served. Full method and charts: porta potty sizing guide.
Worked example
A 150-guest, 6-hour reception with a bar:
- 150 ÷ 50 = 3 base units.
- Longer than 4 hours: 150 ÷ 100 = 1.5, round up to 2.
- Alcohol: 150 ÷ 100 = 1.5, round up to 2.
- Total: 3 + 2 + 2 = 7 units, with at least 1 wheelchair-accessible.
- Food served: add 2 hand-wash stations.
Guests at weddings often prefer running water. See wedding restroom options to swap some units for a trailer.
Porta potty chart for 25 to 500 guests
This chart applies the same method to 10 common crowd sizes. A 300-guest event up to 4 hours needs 6 standard units. A 300-guest event that runs longer with alcohol needs 12. The last column shows the minimum accessible units at 10%, the City of Tulsa guideline for permitted events.
| Guests | Up to 4 hours | Over 4 hours | Over 4 hours + alcohol | Accessible (10%) |
|---|---|---|---|---|
25 | 1 | 2 | 3 | 1 |
50 | 1 | 2 | 3 | 1 |
75 | 2 | 3 | 4 | 1 |
100 | 2 | 3 | 4 | 1 |
150 | 3 | 5 | 7 | 1 |
200 | 4 | 6 | 8 | 1 |
250 | 5 | 8 | 11 | 2 |
300 | 6 | 9 | 12 | 2 |
400 | 8 | 12 | 16 | 2 |
500 | 10 | 15 | 20 | 2 |
Food served? Add 1 hand-wash station per 100 guests, at least 1.
How many porta potties does a construction site need?
A construction site with 20 or fewer workers needs at least 1 toilet under OSHA rule 29 CFR 1926.51(c). Crews of 20 or more need 1 toilet seat and 1 urinal per 40 workers, and crews of 200 or more need 1 seat and 1 urinal per 50 workers. These counts assume weekly cleaning.
| Workers on site | OSHA minimum | Recommended in Tulsa summer |
|---|---|---|
1–10 | 1 toilet | 1 unit, weekly service |
11–20 | 1 toilet | 2 units, or 1 with twice-weekly service |
21–40 | 1 seat + 1 urinal per 40 | 3 units |
41–80 | 2 seats + 2 urinals | 4–5 units |
The legal minimum is in OSHA 1926.51. The recommendation column is a comfort guide for July and August heat, not a legal rule. Confirm with your safety manager. More on job site porta potty rental.
How many accessible porta potties are required?
Permitted events in Tulsa should plan 10% of units as accessible, per the City of Tulsa Special Events Office guideline. The 2010 ADA Standards, section 213.2, require at least 5% of units in each cluster, and no fewer than 1, to be accessible. A cluster of 7 units needs at least 1.
Each accessible unit needs a level, firm path about 8 feet wide. Read the ADA 213.2 text and confirm event rules with the City of Tulsa Special Events Office. This page gives planning guidance, not legal advice. Unit sizes are on the wheelchair-accessible porta potty page.
Porta potty count questions
These 6 answers start with the question renters ask first here: how many porta potties do i need for 100 guests. Each answer gives the number or rule up front, then the conditions, so you can book without a second call.
How many porta potties do I need for 100 guests?
100 guests at an event up to 4 hours need 2 standard porta potties. A longer event needs 3, and a longer event with alcohol needs 4. Add 1 hand-wash station when food is served.
How many porta potties do I need for 200 people?
200 people need 4 standard porta potties for an event up to 4 hours, 6 for a longer event, and 8 for a longer event with alcohol. Make at least 1 wheelchair-accessible, and add 2 hand-wash stations if food is served.
Do I need separate porta potties for men and women?
Separate units are not required. Each standard porta potty has a seat and a urinal and works for everyone. Restroom trailers have separate men's and women's rooms if you want that split.
Can I rent fewer porta potties if the building has bathrooms?
Indoor restrooms that guests can reach count toward the total. Subtract one porta potty for each indoor toilet guests will use, but keep at least 1 outdoor unit near the activity and 1 wheelchair-accessible unit at public events.
How many people does one porta potty serve?
One standard porta potty serves about 50 guests over a 4-hour event, or a crew of up to 10 workers on a 40-hour week with weekly cleaning. Its 60-gallon tank holds about 200 uses between services.
How many porta potties do I need for a 5K or festival?
Races and festivals use the same base of 1 unit per 50 people, but crowds peak at start lines and stages. Cluster units there and follow the City of Tulsa permit guideline of 2 toilets per 250 people with 10% accessible.
More questions on delivery, billing and placement: read all 86 porta potty rental answers.
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Tell us the ZIP, dates and headcount. You get unit, days, delivery, pickup, service and tax on one line each, with no fuel surcharge or card fee.
Call now(918) 217-1414Same-day cutoff: 1 p.m. in Tulsa and nearby towns, 11 a.m. for towns 25–80 miles out, Monday–Saturday. Forms are answered within 1 business hour.