Estimate ice cream for a party.
A standard ice cream scoop is about four fluid ounces, roughly half a cup, and two scoops is a normal serving for a party. That makes the arithmetic straightforward: guests times scoops times scoop size, divided by 128 to get gallons. Twenty-four guests at two scoops is 192 ounces, or a gallon and a half. Splitting across flavours matters practically because the popular flavour disappears first — with three flavours you need half a gallon of each, but if one is vanilla expect to need more of it than the others. Toppings at two ounces a head covers sauce, sprinkles and one substantial topping like brownie pieces.
Ice Cream Party
Total oz = guests x scoops x scoop size; gallons = oz / 128; per flavour = gallons / flavours; toppings lb = guests x topping oz / 16
About a gallon and a half at two four-ounce scoops each. Buy in half-gallon tubs and keep one in reserve, since scoops get generous once serving starts.
Ten to fifteen minutes to soften enough to scoop cleanly. Beyond about half an hour it begins to melt at the edges, so bring tubs out one at a time.