How many porta potties?

Start with 1 standard unit per 50 guests for an event up to 4 hours.

Longer event?

Over 4 hours, add 1 unit for every 150 guests.

Serving alcohol?

Add 1 more unit for every 150 guests.

Make one accessible

At least 5% of units, never fewer than 1, should be wheelchair-accessible.

Example

A 150-guest, 5-hour wedding with a bar needs 5 units.