Restroom Calculator

Need an estimate for how many porta potties your event needs? Use this handy calculator! For a more specific quote tailored to your needs, call us today at 800-210-8407!

My event is estimated at attendees, for hours.
  • Will there be more women than men?
  • Will there be alcohol served?

Your Estimated Sanitation Services

Based on what you've told us, we've generated this estimate for your needs.

If you have more details or would like expert advice to make sure you get the best sanitation solution, please call us at 800.210.8407.

Estimated Standard Portable Restrooms Needed: 0
Estimated Hand Wash Stations Needed: 0
Estimated Enhanced Access Restrooms Needed: 0

Looking for a custom quote on those items?


How Many Porta Potties Do I Need?

When planning weddings, 5k runs, carnivals or any special events you may be asking yourself ,“What kinds of portable restrooms should I rent, and how many should I get?” There are a several different factors that must be taken into account when deciding the types of restrooms to choose such as:

  • How many people will be attending the event?
  • How long is the event going to last?
  • Is alcohol being served?
  • Are more women going to be attending than men?

How Many Porta Potties Do I Need?

Portable Restrooms or “porta potties” are usually an afterthought when planning an event, however, failing to plan your restrooms accordingly may mean the difference between someone staying at your event for an hour or four hours. To make sure that you are ordering the proper number of restrooms, On Site has created this handy restroom calculator to help you in your restroom estimation process. This tool will allow you to get a general idea of the number of restrooms that your event may require. There are some factors that the calculator does not take into account, so please make sure to speak with one of our sales representatives to finalize your full restroom count.

Portable restroom calculatorPortable Restroom Calculator

This calculator will help you decide how many standard portable restrooms, enhanced access portable restrooms and hand washing stations you need. To better understand the results of our calculator, you first have to know a little about portable restroom capacity. One portable restroom can handle around 250 uses before it reaches capacity, so a general rule of thumb is one portable restroom for every 100 attendees. This figure can change quickly when you take several other factors into account. The number of restrooms that you require may increase for events where people may stay for an extended periods of time. The number may also decrease if your event is only going to last a few hours. Alcohol also becomes a factor when deciding, since the consumption of alcohol will increase the number of trips to the restroom. Follow this link to use the restroom calculator.

How it Works

Lets lay this out in a real work scenario. You’re hosting an event with 1,ooo people that is only going to last 3 or 4 hours and alcohol isn’t going to be served. The calculator states that you would need around six standard restrooms and one enhanced access, because its likely that people won’t be using the bathroom too many times in the short time they will be there.

On the other hand, if you are hosting an event with 300 people that will last for eight hours and alcohol WILL be served, the calculator estimates that you will need around five standard restrooms and one enhanced access to keep up with demand.

By using our portable restroom calculator, you will get a more detailed idea of how many portable restrooms, enhanced access portable restrooms and hand washing stations that you will need to effectively meet your guest’s portable restroom needs. Remember though, that our On Site sales representatives can more accurately estimate your restroom needs if there are any factors that may be present for your event. Please contact us at 651-429-3781 to speak with a sales rep in your area!

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