How many porta potties do I need for 100 guests?

For a standard 4-hour event with no alcohol, you need 2 units. If serving alcohol, we recommend 3 units.

What is the OSHA requirement for portable toilets on job sites?

OSHA Standard 1926.51 requires at least one toilet for 20 employees or fewer. However, industry best practice for sanitation is 1 unit per 10 workers serviced weekly.

Planning Assistant: Currently helping 12 NJ contractors estimate site needs.

Planning chart for portable restroom quantities at New Jersey construction sites and outdoor events

Don't guess: Use our NJ-specific planning standards for your next project.

🍻 Serving Alcohol?
Rule of thumb: Increase your restroom count by 20%. Consider upgrading to VIP Flush Units for better guest comfort.

How Many Portable Toilets Do I Need?

One of the most common questions we get at Pottys Plus is: "How many units do I need?" The answer depends on your event type, duration, and whether alcohol is served.

Below are the industry-standard planning guides for New Jersey Events & Construction Sites. Use these tables to get a baseline, then contact us for a verified quote.

🎉 Event Planning Guide (Standard 4-Hour Event)

Guest Count	Min. Units (No Alcohol)	Min. Units (With Alcohol)
1 - 50 Guests	1 Standard Unit	2 Units
51 - 100 Guests	2 Units	3 Units
101 - 250 Guests	3 Units	4-5 Units
251 - 500 Guests	4-5 Units	6-8 Units

🏗️ Construction Site Guide (OSHA Guidelines)

Crew Size (Single Shift)	Minimum Standard Units	Service Frequency
1 - 10 Workers	1 Standard Unit	1x Weekly
11 - 20 Workers	2 Units	1x Weekly (or 2x Service)
21 - 40 Workers	3 Units	1x Weekly

♿ ADA Requirements

For public events, aim for 5% of your total fleet to be ADA Compliant. (Min. 1 ADA unit per 20 standard units).

⏳ Duration Factor

The charts above assume a 4-hour event or 40-hour work week. For longer events, increase unit count by 15% per extra hour.

🧼 Handwashing

Don't forget hygiene. We recommend 1 Handwash Station per 4 Restrooms, especially where food is served.

Start Your Planning

Calculate your exact needs or download our handy checklist.

🧮 Launch Unit Calculator 📄 Download PDF Checklist

Planning FAQs

What happens if I don't order enough units?

Under-ordering leads to long lines, overflowing tanks, and unsanitary conditions. It's always cheaper to rent one extra unit than to pay for an emergency pump-out on a weekend.

How does alcohol affect the restroom count?

Alcohol is a diuretic. Guests at events with open bars will use the restroom 30-40% more frequently. We strongly recommend increasing your unit count if alcohol is served.

Can I just service the units more often instead of renting more?

Yes, for construction sites. If you have limited space, we can service a single unit 2x or 3x per week to handle a larger crew. For one-day events, this isn't usually an option; you need more units.

📍 Serving NJ Statewide