How many toilets do I need for an event?

Planning an outdoor event involves a long list of moving parts, and toilet provision is one of the most important. Whether you’re organising a small gathering or a large-scale festival, getting the right number of portable toilets in place is essential for keeping things running smoothly.

Too few facilities can lead to long queues, poor guest experience and hygiene issues. Too many, on the other hand, can increase costs unnecessarily. The key is finding the right balance based on your event, your guests and how the site will be used.

In this practical guide from the modular building lease specialists at Bunkabin, we break down how many toilets you need for an event, the factors that affect toilet usage and how to plan your toilet hire effectively.

WHY TOILET PROVISION IS CRITICAL TO A SUCCESSFUL EVENT

Toilet provision is rarely the first thing considered when planning an event, but it is often one of the first things to go wrong if it’s underestimated.

At busy outdoor events, facilities are under constant demand. When the number of toilets doesn’t match the number of guests, issues build quickly. Queues form, hygiene standards drop and certain areas of the site can become congested, particularly during peak times such as breaks, meal periods or headline acts.

Getting the right number of portable toilets in place allows guests to move easily between areas without unnecessary delays, and this reduces pressure on high-traffic zones.

Well-planned toilet provision also eases demands on overall site management. Clean, accessible facilities help maintain hygiene standards throughout the event, while clearly positioned units reduce confusion and keep movement organised.

This becomes even more important for longer events or festivals, where facilities are used repeatedly over several hours or days. Without sufficient toilets and regular servicing, even a well-run event can quickly become difficult to manage.

From a guest perspective, access to clean, well-maintained toilets has a direct impact on how the event is experienced. Long queues or poorly maintained facilities are often remembered more than the event itself.

In practical terms, providing enough toilets plays a key role in keeping the event running smoothly, supporting site operations and making guests remain comfortable throughout.

ARE THERE LEGAL REQUIREMENTS FOR EVENT TOILET PROVISION?

Beyond operational considerations, event organisers also have a responsibility to meet recognised guidance and legal expectations around welfare facilities.

While there is no single fixed legal requirement that defines exactly how many toilets are needed for every event, organisers are expected to provide adequate toilet and handwashing facilities to protect public health and safety. This forms part of broader health and safety obligations, particularly for public events.

In practice, local authorities and Safety Advisory Groups often refer to The Purple Guide to Health, Safety and Welfare at Music and Other Events when assessing toilet provision. This industry-standard guidance sets out recommended ratios and best practices based on factors such as event duration, attendance and whether food or alcohol is served.

Additional requirements may also be applied through event licensing. Depending on the size and type of event, organisers may need to demonstrate that sufficient toilet facilities, accessible units and servicing arrangements are in place before approval is granted.

For this reason, toilet provision should always be considered early in the planning process, rather than treated as a last-minute addition.

HOW MANY PORTABLE TOILETS DO YOU NEED PER PERSON FOR AN EVENT?

The optimum number depends on several factors, including event duration, guest numbers and whether food and alcohol are served at the event.

As a rough guide based on industry standards like the Purple Guide recommend:

• Up to 6 hours (no alcohol): 1 portable toilet per 100 guests
• Up to 6 hours (with alcohol): 1 portable toilet per 75 guests
• Events lasting longer than 6 hours: increase provision to at least 1 toilet per 60-75 guests.
• Festivals or camping events: plan for 1 toilet per 50–75 guests, depending on duration and alcohol consumption, along with daily cleaning, waste emptying and restocking.

This is only a starting point. If you require toilet facilities for your event, you should discuss your needs with the Bunkabin team.

KEY FACTORS THAT AFFECT TOILET NUMBERS

When working out how many portable toilets you need for an outdoor event, it’s important to consider the full picture.

1. Event duration

Toilet usage increases over time. Short events may need fewer units, while longer events require more facilities and regular servicing to manage waste effectively.

2. Number of guests

The more guests attending, the more toilets you’ll need. Planning for peak times rather than averages helps avoid long queues.

3. Food and alcohol

Serving food and alcohol increases toilet usage. Events with refreshments or bars will need more portable toilets than those without.

5. Type of event

Festivals, outdoor events and events with camping require more toilets than short, daytime gatherings. The layout of the site also plays a role in how units are distributed.

TYPES OF TOILETS TO CONSIDER

Not all toilet facilities are designed for the same level of use. Choosing the right type of units will have a direct impact on queues, servicing requirements and overall guest experience.

Standard Portable Toilets

Standard portable toilets are often the starting point for basic toilet provision. They are quick to deploy and suitable for short events with lower attendee numbers.

However, as guest numbers increase or events run for longer periods, relying solely on individual portable toilets can create challenges. High usage can lead to long queues, more frequent cleaning requirements and a drop in overall comfort, particularly during peak times. As guests increasingly look for more comfort and higher-quality facilities when deciding which events and festivals to attend, these units can begin to feel limited in terms of both capacity and overall experience.

Toilet blocks and welfare units

For larger or longer events, toilet blocks offer a more practical and scalable solution. Designed to handle higher footfall, these units include multiple cubicles, integrated handwashing facilities and a more structured layout.

This allows more guests to be served at once, reducing queues and improving flow across the site. With facilities grouped into a single unit, cleaning and servicing can also be managed more efficiently throughout the event.

Toilet blocks also provide a more consistent standard of hygiene and comfort, which becomes increasingly important at busy outdoor events or festivals where facilities are in constant use.

At Bunkabin, our toilet blocks are built for high-demand environments, including a deluxe toilet block, to provide a reliable alternative to standard portable toilets with superior capacity, cleanliness and ease of management.

GETTING THE RIGHT SETUP FOR YOUR EVENT

Every event is different, and toilet provision should reflect that. While general guidelines are useful, working with an experienced team can help you plan more accurately based on your venue, guests and event type.

At Bunkabin, we have a long-established reputation for leasing a wide range of portable toilets for events across the UK, and are a long-standing supplier to the UK's most well known festival - Glastonbury. Our team can help you calculate how many toilets you need, arrange delivery and make sure everything is set up to support your event from start to finish.

If you’re planning an event and want a personalised quote or advice on toilet hire, get in touch with our team to discuss your requirements.