The amount of ice you will need depends on your industry and how many people it will serve. For a general idea of ice needs, here is a breakdown by different industries:
Restaurants - average of 2lb of ice per customer per day.
Bars - average use of 3lb of ice per seat.
Hotels - use about 5lb. of ice per room per day.
Hospitals - cafeterias 1lb. of ice per person and an average 10lb for every bed
Schools & Universities cafeterias - average 1.5lbs of ice per student per day.
Construction Companies - average 10lb of ice per employee.