How Many Porta Potties Do I Need? Calculator

Number of guests

Event length (hours)

Alcohol served Food served

4
porta potties

1
ADA unit included

1
hand wash stations

Example values shown. This is a planning estimate; we confirm the count when you call.

Porta potty count chart

Standard units, no alcohol. Add 20% if alcohol is served and at least one ADA unit for public events.
Guests	Up to 4 hrs	6 hrs	8 hrs
50	1	2	2
100	2	3	3
150	3	4	4
250	5	6	7
500	10	12	13

Base rate: one standard unit per 50 guests for up to 4 hours.
Longer events: add about 15 percent for every 2 extra hours.
Alcohol: add about 20 percent.
Accessibility: at least 5 percent of units, and never fewer than one, should be ADA units at public events.
Food: about one hand wash station for every four toilets.

Plan one unit per 10 workers on a 40-hour week with weekly service. See the OSHA requirements.

How many porta potties do I need for 100 people?

For 100 guests over about 4 hours, plan two standard units. For 6 hours or more, or with alcohol, plan three.

How many porta potties for 300 guests?

A 300-guest event of about 4 hours needs six units. An 8-hour event with alcohol needs about ten, including at least one ADA unit.

How many people can use one porta potty?

One standard unit handles about 200 uses before it needs pumping, which is roughly 50 guests for a 4-hour event.