Porta Potty Calculator

Estimate how many porta potties you will need for your event or construction project.

Event Porta Potty Calculator

To estimate the number of restrooms needed for your event, determine the total duration of your event. For multi-day events, use the longest single day. Next, calculate the guest count, considering the highest attendance day if applicable. Refer to the chart to determine the required number of portable restrooms.


Note: If alcohol will be served, plan for 15-20% additional restrooms. Include one Handicap Accessible Restroom per 20 portable restrooms or at least one for public events. Ensure proper handwashing facilities are available in all food service areas. A minimum of one handwash station should be added for every four portable restrooms.

Table showing event length in hours versus the number of attendees and associated values.
Diagram: A cocktail and pizza slice equals five portable toilets, with a note to add 10-20% for food and drinks.

Event Porta Potty Calculator

To estimate the number of restrooms needed for your event, determine the total duration of your event. For multi-day events, use the longest single day. Next, calculate the guest count, considering the highest attendance day if applicable. Refer to the chart to determine the required number of portable restrooms.


Note: If alcohol will be served, plan for 15-20% additional restrooms. Include one Handicap Accessible Restroom per 20 portable restrooms or at least one for public events. Ensure proper handwashing facilities are available in all food service areas. A minimum of one handwash station should be added for every four portable restrooms.