Local trucks from Aiken, SC
How many porta potties do I need?
Use this calculator and the tables below to count porta potties for any party, wedding, festival or jobsite around Aiken. Each answer shows the math and names the source, so you can check it or show it to a planner or inspector.
- Delivery area: once you have your count, check delivery to your ZIP in the box.
- Arrival: event units are set the day before; jobsite units on your start date.
- Quick answer: 1 standard unit per 50 guests for 4 hours; 1 per 40 workers on a jobsite (OSHA).
- Cleaning: events under one day need no service; jobsites get weekly service.
- Full cost: enter your count on the quote form and we price it line by line.
How many porta potties do I need for my event?
You need about one standard porta potty for every 200 expected uses, which is guests times hours divided by 200. A 100-guest, 5-hour event needs 100 × 5 ÷ 200 = 2.5, rounded up to 3 units. Add 1 unit for every 4 when alcohol is served, and 1 hand washing station per 3 toilets when food is served.
The calculator shows each step, so you can check the math. It is a planning estimate. We confirm the final count against your site on the call.
Got your number? Lock in the date.
Call and we will check the count against your site.
Calls answered live 7 AM–7 PM, Mon–Sat. Quote requests answered within 15 minutes during those hours.
What method does the calculator use?
The calculator uses a 200-uses-per-unit planning number for a standard porta potty with a 60-gallon tank, assuming each guest uses the restroom about once an hour. Alcohol raises use, so we add 1 unit for every 4. The accessible count follows the 2010 ADA Standards. Jobsite counts follow OSHA Table D-1.
- Event base: guests × hours ÷ 200, rounded up, minimum 1.
- Alcohol: add 1 unit for every 4 units, minimum 1. If the table says 5 units, add 1 for alcohol, for 6.
- Food: add 1 hand washing station for every 3 toilets.
- Accessible: at least 5% of units in each cluster, minimum 1 (2010 ADA Standards §213.2), when restrooms are provided for the public.
- Jobsite: OSHA 29 CFR 1926.51 Table D-1. 20 or fewer workers = 1; 21–199 = 1 seat and 1 urinal per 40; 200+ = 1 per 50.
Official sources: OSHA 1926.51 and the 2010 ADA Standards. These are minimums and planning numbers; your venue or permit office has the final say.
How many porta potties do I need for 100, 150 or 200 guests?
For a 5-hour event, 100 guests need 3 standard porta potties, 150 guests need 4, and 200 guests need 5, before adding for alcohol. With a bar, those become 4, 5 and 6. Each count includes rounding up, and each setup should include at least 1 wheelchair-accessible unit.
| Guests | 5 hrs, no alcohol | 5 hrs, with alcohol | Hand wash stations (food) | Accessible units |
|---|---|---|---|---|
| 50 | 2 | 3 | 1 | 1 |
| 100 | 3 | 4 | 2 | 1 |
| 150 | 4 | 5 | 2 | 1 |
| 200 | 5 | 6 | 2 | 1 |
| 300 | 8 | 10 | 4 | 1 |
| 500 | 13 | 16 | 6 | 1 |
Worked example: a 150-guest wedding with a bar, 5 hours
- 150 × 5 = 750 expected uses.
- 750 ÷ 200 = 3.75, rounded up to 4 units.
- Alcohol: 4 units ÷ 4 = 1 more unit, for 5.
- Food: 5 ÷ 3 = 1.7, rounded up to 2 hand washing stations.
- Accessible: 5% of 5 is less than 1, so 1 of the 5 units is wheelchair-accessible.
How many porta potties does a construction crew need?
A construction crew of 20 or fewer workers needs 1 toilet under OSHA 29 CFR 1926.51(c). Crews of 21 to 199 need 1 toilet seat and 1 urinal per 40 workers. Crews of 200 or more need 1 seat and 1 urinal per 50. Each of our standard units has one seat and one urinal.
| Workers | Standard units | Hand wash stations (1 per 2 units) | Service |
|---|---|---|---|
| 1–20 | 1 | 1 | Weekly |
| 21–40 | 1 | 1 | Weekly; twice in summer |
| 41–80 | 2 | 1 | Weekly |
| 81–120 | 3 | 2 | Twice weekly |
| 121–160 | 4 | 2 | Twice weekly |
| 200 | 4 | 2 | Twice weekly |
| 250 | 5 | 3 | Twice weekly |
Do event length and crowd type change the count?
Yes. Longer events need more units because uses pile up hour by hour. Crowds that drink, crowds with many women and children, and events where everyone breaks at once (halftime, intermission) need more. Low-turnover crowds, like a seated church picnic, can run a little lighter.
When in doubt, round up. An extra unit costs far less than a line at the restroom during the toast or the halftime break.
Sizing questions
These {'porta potty'} answers are short on purpose: the answer first, then any condition that changes it. They cover the details renters usually check before paying. Still unsure about your own site or dates? Call (803) 343-9386 and get a straight answer from the Aiken office.
How many porta potties for 50 people?
One standard unit covers 50 guests for up to 4 hours. For 5–8 hours, or with alcohol, use 2.
How many porta potties for a 300-person festival?
For a 6-hour festival, 300 × 6 ÷ 200 = 9 units. With beer sales, add 2 for 11. Make at least 1 accessible per cluster and add 4 hand washing stations near food.
Does a restroom trailer count as more than one unit?
A 2-stall restroom trailer handles roughly the uses of 2 to 3 standard units, because guests move faster with flush toilets and sinks.
Do I need more units for an all-day tailgate?
Yes. Use the full hours guests are on site, not just the race or game time. A 7-hour tailgate for 100 is 4 units.
How many units for a 30-person crew working 6 days a week?
OSHA requires 1 unit for 21–40 workers. A 6-day week fills a unit faster, so book twice-weekly service or add a second unit.
Book the count you need
We deliver from Aiken and set every unit level and clean.
Calls answered live 7 AM–7 PM, Mon–Sat. Quote requests answered within 15 minutes during those hours.