Factors to consider in your calculation
1.- Determine the total time the restrooms should be available.
2.- Determine how many people will attend.
3.- If beverages or alcohol will be served, add 15% to 20% more restrooms.
4.- If there’s a higher ratio of women-to-men attending, add 15% to 20%.
5.- Add one handicap restroom per 20 standard restrooms or a minimum of one for events open to the public.
6.- Adequate hand-washing should also be provided with restrooms in all food service areas.
| Employees | Hours per Week | Restrooms Needed |
|---|---|---|
| 1-10 | 40 | 1 |
| 11-20 | 40 | 2 |
| 21-30 | 40 | 3 |
| 31-40 | 40 | 4 |
| Over 40 | 40 | Add 1 for every 10 employees |
| Attendees | 1 hour | 2 hours | 3 hours | 4 hours | 5 hours | 6 hours | 7 hours | 8 hours | 9 hours | 10 hours |
|---|---|---|---|---|---|---|---|---|---|---|
| 0-50 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| 51-100 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 3 |
| 101-250 | 3 | 3 | 3 | 3 | 4 | 4 | 4 | 4 | 6 | 6 |
| 251-500 | 4 | 4 | 4 | 6 | 6 | 6 | 8 | 8 | 8 | 8 |
| 501-750 | 4 | 4 | 6 | 6 | 6 | 8 | 8 | 8 | 10 | 10 |
| 751-1,000 | 6 | 6 | 6 | 8 | 8 | 8 | 12 | 12 | 12 | 12 |
| 2,000 | 8 | 8 | 8 | 8 | 8 | 12 | 12 | 12 | 12 | 16 |
| 3,000 | 8 | 12 | 15 | 16 | 18 | 18 | 18 | 19 | 20 | 21 |
| 4,000 | 10 | 16 | 18 | 22 | 24 | 25 | 25 | 27 | 27 | 28 |
| 5,000 | 12 | 20 | 24 | 27 | 29 | 31 | 32 | 34 | 35 | 35 |
| 6,000 | 14 | 24 | 28 | 33 | 35 | 37 | 37 | 39 | 40 | 42 |
| 7,000 | 18 | 28 | 34 | 38 | 40 | 42 | 46 | 46 | 48 | 48 |
| 8,000 | 20 | 32 | 38 | 44 | 48 | 50 | 50 | 50 | 52 | 54 |
| 9,000 | 22 | 32 | 42 | 48 | 52 | 54 | 54 | 56 | 58 | 64 |
| 10,000 | 24 | 38 | 48 | 54 | 58 | 62 | 64 | 66 | 68 | 72 |