How Many Portable Toilets Do You Need?
Use our calculator to estimate the right number of portable toilets for your event or construction site.
There are few things less desirable than waiting in line to use a portable toilet. The ZTERS portable toilet calculator helps you start your rental process with confidence. With accurate estimates, your guests aren’t forced to wait in long lines—and you don’t end up paying for unnecessary units.
As a general rule, we recommend 1 toilet per 25 people, but there is no one-size-fits-all solution. Instead of guessing, use our calculator—built from decades of experience—to calculate exactly how many portable toilets you need. Select your occasion below, enter your details, and we’ll send you an estimate.
Portable Toilet Calculator
Event Calculator
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Common Examples
Portable Toilets Needed For a Wedding
People commonly ask how many portable toilets are needed at weddings—especially with outdoor weddings. Keep in mind that whenever alcohol is involved, there’s a higher need for restrooms. Plan for one wedding portable toilet per 25 guests.
ADA-compliant portable toilets are often ideal for weddings as they are spacious enough for families, guests with limited mobility, and bridal parties.
We recommend booking wedding portable toilets well in advance, especially in peak seasons. Secure your rental at least 2–3 months before the wedding.
Portable Toilets Needed for Construction Sites
Construction rentals must comply with OSHA regulations regarding the number of units per worker. ZTERS accounts for these standards and can help with local requirements.
General construction requirements:
- One toilet for up to 20 employees
- One toilet seat and one urinal per 40 workers (over 20 employees)
- One toilet seat and one urinal per 50 workers (over 200 employees)
For high-usage sites, units should be cleaned weekly—or add more units if weekly service isn’t feasible.
ZTERS Construction and Event Portable Toilet Solutions
From weddings to construction sites and festivals, ZTERS provides accurate calculations for how many portable toilets you need. Get your estimate in minutes and call us for a free quote.