How many portable toilets do I need for my event?

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Figuring out what portable toilets you need for an event involves several factors. Typically, the recommended amount is 1 per 100 guests. This will suit well for an event that lasts up to 6 hours. But obviously, not every event is the same. If you are organising a unique event, your portable toilet needs will also be unique.

This post will discuss calculating the number of toilets you need.

First, answer these questions before choosing the right number of portable toilets for you

It’s much easier to calculate what you need if you have a bit of brainstorming first. The following questions will help you figure out what numbers you will need.

What type of event is it?

The type of event will determine the type of toilet unit needed. If it’s a family party, baby-changing facilities could be needed. Festival attendees are likely to need more toilets as numbers will be higher. And if you want to spoil your wedding guests, our luxury toilet trailers are a great option.

How many guests will there be?

The answer to this question is the beginning of your calculations. Will there be 200 party guests? What if your event for 30 is in a remote location? Or are you providing facilities for 50-70 people at an event that also has indoor facilities?

As a general rule, it is advisable to start with 1 toilet per 100 people. And then add in other factors to make sure you have the right calculations.

What is the duration of the event?

It’s important that you consider whether your event is for a few hours, overnight, or even for a few days. If it lasts for a weekend or longer, then you are likely to need double the number of toilets than if it’s 4-6 hours.

Will alcohol be served?

If food or drink is served at your event, you will need:

  • At least 1 toilet per 75 women
  • At least 1 toilet per 400 men and 1 urinal per 100 men.

Guests drinking alcohol are more likely to need the facilities than those who don’t. That’s because alcohol is a diuretic, which promotes water loss through urine. So, it makes sense to provide more units for both of these situations.

Where is the event?

Outdoor weddings have become a very appealing modern option. And couples are realising that they need to factor toilets into their budget. Music festivals and country fairs are also likely to take place in remote locations. If your event has no fixed toilet facilities, portable toilets will be the only option. You’ll need more of them to keep things running smoothly.

What is the ratio of females to males?

Be aware of how many women and men are attending your event. This is to ensure that you can provide facilities that ensure everyone is comfortable. It won’t help the party mood if the ladies have a massive queue for 1 toilet and the men’s toilet is constantly free. Have at least 1 toilet per gender, and don’t expect your guests to share one toilet to cut costs.

Also, if you have more men than women, consider hiring more urinals than toilet units.

These factors can also be considered

And it doesn’t stop there. Make sure you have thought about other factors before deciding on your numbers.

Such as…

Age of the attendees

It is likely that if any of your guests or attendees are very old or very young, you will need more portable toilets. Older people with continence issues will appreciate having convenient toilets. Parents with small children will also be looking for easy-access toilets. And a baby-changing unit will be welcome at a family occasion.

Health conditions of the attendees

It’s important to provide facilities for guests with health conditions. You may be aware of how many guests with disabilities are attending. Or it may be an event where it is impossible to know. In both cases, it is a good idea to provide plenty of disabled access toilets and place them accordingly.

How to calculate the number of portable toilets required?

LetLoos recommend the following when it comes to calculating the portable toilets needed,

At least:

  • 1 toilet per 100 people
  • 1 toilet per gender
  • 1 toilet per 75 women
  • 1 toilet per 400 men
  • 1 urinal per 100 men

Using our online event hire calculator makes things easier. It allows you to calculate how many toilets you need for your event. Simply input the number of guests and the length of your event. Then you’ll get a recommendation for the number of toilets you need.

Tip for booking enough portable toilets for events: Overestimate your numbers

It is clearly better to have more toilets than to have too few. Even if you end up with too many, the worst that will happen is no queues. That’s never a bad thing. If there is alcohol at your event, people will be drinking more than usual. Alcohol makes people need the toilet more, so you are likely to need around 15%-25% of toilets more than usual.

Providing plenty of toilets will ensure a hygienic and safe environment. This will keep the party mood up and help guests enjoy themselves.


LetLoos provides a variety of portable toilets across London, Essex, and Liverpool. That includes standard toilets, urinals, hot wash loos, and luxury toilet trailers. We take care of installation, maintenance, and removal. So you can enjoy your event without any hassle.

Our portable toilets for events are high-quality units that meet the highest hygiene standards. Each unit is steam cleaned before delivery, eliminating 99.9% of bacteria and germs. Our team also provides an emptying and cleaning service. This will keep the toilets fresh and replenished throughout your event.

We provide short-term and long-term options, with no need to make an account. Simply order online or call us, and if you order before 12 pm, you are guaranteed next-day delivery.

Leo Sharp
Content writer and researcher at LetLoos