A 60-second count for Detroit parties and job sites.
Start with 1 unit per 50 guests for an event up to 4 hours.
Past 4 hours: add 50%, rounded up. Alcohol served: add 1 unit.
1 toilet for 1–20 workers, 2 for 21–40, then 1 more per 40 (R 408.40129).
Use the free calculator or call (313) 476-6006.