How do I calculate how many toilets I need

How do I calculate how many toilets I need?

When planning an event, building a facility, or managing a public space, one crucial question often arises: how many toilets do I need? This question is not only about comfort but also about complying with health regulations and ensuring user satisfaction. Today, we are here to give you an answer to this question with one example.

Welcome to our portable toilet rentals company, your premier destination for top-quality portable restroom solutions. Whether you’re organizing a large festival, a corporate event, or a construction project, our commitment is to provide clean, reliable, and comfortable sanitation facilities tailored to meet your specific needs. At Star Porta Potty Rental, we pride ourselves on exceptional customer service and ensuring that every detail is handled with utmost care and professionalism.

With a wide range of options from standard units to luxury trailers equipped with modern amenities, we are dedicated to enhancing the experience of your guests and workers, ensuring every event runs smoothly and hygienically.

What is the formula for calculating the number of required toilets?

How many toilets would be required, then? This could be guided by several issues, say the type of building, the number of people using the facility, and the building codes or regulations that apply. Hereunder are general guidelines for different scenarios.

Public or Commercial Buildings

The number of toilets installed in public or commercial buildings is dependent on the local building code. These codes often consider both the number of people the building accommodates and the gender distribution. For example, the International Plumbing Code (IPC) provides detailed requirements. Common rules might require:

  • Restaurants and Bars: At least one toilet for every 75 females and one urinal plus one toilet for every 75 males.
  • Offices: One toilet for every 50 employees up to 150, then one additional toilet for every 100 employees thereafter.
Event Venues

There are also some general, specific guidelines concerning temporary events or venues, such as concerts or festivals. The golden rule should be to:

  • Small Events (fewer than 100 attendees): At least one toilet per gender.
  • Larger events: More toilets are installed in proportion to the size of the crowd, and such installations are often advised either by the event planners or by local regulations. It can be advised to have one toilet per 100 females and one urinal plus one toilet for every 200 males.
Residential Homes

In residential settings, the need is less about strict codes and more about practicality and comfort:

  • Single-family Homes: Generally, one or more toilets should be required, and further bathrooms or half-baths are optional according to the number of persons in a family and house arrangement.
  • Multi-family Buildings: One toilet per dwelling unit, with more in common area restrooms under building size and type.

Calculation Example of Toilets Required

Here’s a basic example of how you might calculate the number of toilets needed for a commercial office setting:

  • Determine the maximum number of people using the building at any given time.
  • Apply the relevant code or rule. For example, if you have 200 employees with a gender ratio of 50/50:
    • Male Toilets: 100 males/50=2 toilets 
    • Female Toilets: 100 females/50=2 toilets.

Types of Events

Toilet Requirements


1 toilet per 50 guests


1 toilet per 75 guests


1 toilet per 60 guests, plus additional urinals for large crowds

Corporate Events

1 toilet per 50 guests

Sporting Events

1 toilet per 75 guests

Construction Sites

1 toilet per 10 workers (for a 40-hour work week)


1 toilet per 50 guests

Family Reunions

1 toilet per 50 guests

Outdoor Markets

1 toilet per 100 visitors

Charity Events

1 toilet per 75 guests

The above table shows the average toilet required.

Portable toilets in a park

Benefits of portable toilets

  • Cost-Effectiveness: Portable toilets provide a cost-effective solution compared to permanent restroom facilities, especially for temporary events or construction sites.

  • Flexibility: They can be placed almost anywhere, offering flexibility in event planning and site layout. This makes it easy to meet the needs of guests or workers no matter the location.

  • Convenience: Increases convenience for attendees, reducing the time spent walking to distant restroom facilities and thus improving the overall event experience.

  • Sanitation: Promotes better sanitation by providing more access points for handwashing and toilet use, which helps maintain cleanliness and public health.

  • Environmentally Friendly: Many portable toilets now use eco-friendly chemicals and reduced water usage methods, helping to minimize environmental impact.

  • Compliance with Regulations: Helps meet legal requirements for sanitation facilities at public gatherings and construction sites, ensuring that all health and safety standards are met.

Summing It Up!

To sum up, portable toilets fix a practical issue and are therefore required for various events and construction sites. They are cost-effective, relatively flexible, and time-saving, thus, improving the overall experience, as they would reduce wait times, and, by being easily accessible, would provide easy sanitation services.

Additionally, they support environmental initiatives through eco-friendly options and ensure compliance with necessary health regulations. Portable toilets facilitate the sustenance of exemplary levels of cleanliness and functionality in the restrooms at events and worksites making sure that guests, as well as workers, may have quick access to comfort and sanitary infrastructure.

Norman Demeo, the innovative pioneer behind Star Porta Potty Rentals, has reshaped the landscape of the temporary sanitation industry in the United States with a blend of dedication, environmental consciousness, and commitment to exemplary service. With a steadfast focus on maintaining high hygiene standards, sustainable practices, and a nurturing work environment, Norman Demeo has successfully elevated the standard of porta potty rental services across the nation.