How much ice do you need for a party? A planner for glasses and the tub

Party guides disagree on ice because ice does two jobs: it goes into glasses, and it fills the tub that keeps bottles and cans cold. Count each job separately and the answer stops being a guess.

Set the guests, the hours and how much is served over ice, and the planner splits the total into glasses, tub and melt, then turns it into bags. It also shows why a tub needs several times more ice than the physics of chilling alone.