Ice Calculator
Work out how many pounds of ice and how many bags to buy for your guests, accounting for the weather and chilling drinks.
Rule: plan about 1 lb of ice per guest for cooling and topping up drinks, or ~1.5 lb each in hot weather. Chilling bottles and cans in tubs roughly doubles that, so "both" adds another pound per guest. Parties longer than three hours melt through more, so this nudges the total up as the hours climb.
How it works
Ice is the thing hosts forget until it's gone. The baseline rule is about one pound of ice per guest to keep drinks cold and topped up — bump that to roughly 1.5 pounds each on a hot day, since ice melts faster and people want more of it.
If you're also burying bottles and cans in tubs to chill them, that's a whole separate demand. Chilling roughly doubles the requirement, so choosing "both" adds another pound per guest on top of the drink ice.
Long parties melt through more, so anything past three hours nudges the total upward. The result comes in pounds and in 20-pound bags, which is how most stores and gas stations sell it.
Frequently asked questions
How much ice do I need per person?
Plan about one pound per guest for drinks, or 1.5 pounds each in hot weather. If you're chilling bottles and cans in tubs too, roughly double it to cover both jobs.
Why does hot weather need more ice?
Ice melts faster in heat and guests reach for cold drinks more often, so the per-person figure climbs. This tool switches from one pound to 1.5 pounds per guest when you mark the day as hot.
How many 20-lb bags is that?
The tool divides the total pounds by 20 and rounds up, since bagged ice is usually sold in 20-pound bags. It's smart to grab one extra bag as insurance against a long, warm afternoon.