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Tel: 905.760.2400
Toll Free: 1.800.267.3784
Fax: 905-760-2405
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Requirement Calculator

The number of portable restroom units needed for a special event fluctuates widely. There are many variables that effect how many portable washrooms you will require.
We have provided the calculator below to assist you with planning your restroom facilities for your next event.

# Guests in Attendance

Event Duration

Will there be a higher percentage of women to men in attendance?
Yes No

Will there be alcohol served during your event?
Yes No

Estimated # of toilets needed:
As a rule, you will need no less than three regular units for each 100 attendees for a six hour event.


Some events require fewer portable restrooms than their attendance would suggest. Fairs, festivals, and outdoor events, that take place over more than one day, have a fluctuating crowd. Attendance varies by time, weather conditions and general interest.  The attendee population tends to be very transient.

If an event features overnight camping and people are eating three meals a day on site, portable washroom requirements will be higher.
Weather conditions and alcohol consumption also play a role in this calculation.
Don't forget to include frequency of service and handwash station rentals when calculating your budget.
Nature's Call has a wide variety of luxury mobile washroom suites available for use during your celebration or special event as well.  Our trailers range from simple to luxurious.  Call today and one of our helpful staff will be happy to give you more details.
Contact Nature's Call to speak to our knowledgeable staff. We can help you plan your next special event.


When determining the number of restrooms for your commercial or construction site, CSA standards require one portable toilet for every 10 workers for a 40-hour work week.

If you have any questions or concerns, please contact us at or call toll free 1-800-267-3784 for information or assistance.
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