Free party ice calculator. Estimate pounds of ice, 10 lb bags and 48 quart coolers for your guest count, venue heat and food kept on ice.
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Start from 1.5 lb of ice per guest for an indoor party. Outdoor parties add 25 percent for melt, giving 1.875 lb per guest, and summer parties above 85F add 50 percent, giving 2.25 lb per guest. Serving food on ice adds another 50 percent on top of the venue figure, since a food cooler stays cold all afternoon. Divide total pounds by 10 for grocery bags and by 40 for 48 quart coolers filled around drinks.
Ice for a party is guests times a per-guest rate, adjusted for heat and for food kept on ice. The indoor rate is 1.5 lb per guest, which covers ice in drinks for a normal party. Outdoor parties melt faster, so the rate rises by 25 percent to 1.875 lb. Summer parties above 85F rise by 50 percent to 2.25 lb. If a cooler is dedicated to food on ice, multiply again by 1.5, since that ice must last the whole afternoon without being topped up from the drinks cooler.
Enter your guest count, pick the venue that matches your party, and say whether any food will sit on ice. The calculator returns total ice in pounds and kilograms, the number of standard 10 lb grocery bags to buy, and the number of 48 quart coolers that ice fills around drinks. Buy the bag count shown, not a rounded-down figure, since ice is cheap and running out mid-party is the failure this calculator exists to prevent.
The standard party ice pounds per guest are 1.5 lb indoors, 1.875 lb outdoors and 2.25 lb in summer heat. Those rates assume drinks only. Some guides quote a simpler 1 lb per guest for drinks in glasses indoors, rising to 2 lb outdoors when coolers are being chilled too. This calculator uses the higher, safer rates, because a party that runs out of ice cannot be fixed after the shops shut.
Grocery bags of ice most commonly hold 10 lb, at roughly 2 to 4 dollars per bag, with 7 lb, 16 lb and 20 lb bags also sold. Divide total pounds by 10 and round up to whole bags: 30 lb needs 3 bags, 45 lb needs 5 bags, 135 lb needs 14 bags. If your shop sells 20 lb bags, halve the bag count. Buy one extra bag for a long party, since melt over 4 hours or more eats into the supply.
A 48 quart cooler holds about 40 lb of ice when filled around drinks, since cans and bottles displace the rest of the space. The same cooler filled with ice alone holds about 58 lb. That gives a simple rule: one 48 quart cooler per 40 lb of ice, so 30 lb needs 1 cooler, 75 lb needs 2 coolers, and 135 lb needs 4 coolers. For 30 or more guests, two smaller coolers beat one giant cooler, since they are easier to lift and you can separate drinks from food on ice.
Food on ice, such as meat, oysters or a veggie tray sitting in a cooler all afternoon, needs about 50 percent more ice than drinks alone. Use a separate cooler for food, because a drinks cooler is opened dozens of times and its ice melts fast, while a sealed food cooler keeps ice about twice as long. An ice-bath food display table needs far more ice again, roughly double the drinks rate, so plan it as its own cooler, not as an addition to the drinks count.
For 20 guests indoors with no food on ice, ice is 20 times 1.5, which is 30 lb, or 3 bags of 10 lb, or 13.61 kg, filling 1 cooler of 48 quarts. For 40 guests at a summer party with food on ice, the rate is 2.25 times 1.5, which is 3.375 lb per guest, giving 135 lb, or 14 bags, or 61.23 kg, filling 4 coolers. For 20 guests at a summer pool party with no food on ice, ice is 20 times 2.25, which is 45 lb, or 5 bags, filling 2 coolers.
Buy ice on the day of the party, 2 to 4 hours before guests arrive, since bags stored overnight in a home freezer fuse into blocks. Pre-chill drinks before they go in the cooler, keep coolers in the shade, and leave meltwater in place, since cold water still cools. Keep lids closed between servings, and top up tubs as the party goes on rather than buying one huge amount at the start and watching it melt.
Plan 1.5 lb of ice per guest indoors, 1.875 lb outdoors and 2.25 lb in summer heat above 85F, for drinks only. Add 50 percent more if food is kept on ice, and buy an extra bag for parties running longer than 4 hours.
For 20 guests indoors, plan 30 lb of ice, which is 3 bags of 10 lb and 1 cooler of 48 quarts. Outdoors that rises to about 38 lb, and in summer heat to 45 lb, which is 5 bags and 2 coolers.
A 48 quart cooler holds about 40 lb of ice when filled around drinks, and about 58 lb when filled with ice alone. Plan one 48 quart cooler per 40 lb of ice for a drinks setup.
Divide total ice pounds by 10 and round up to whole grocery bags. A 30 lb party needs 3 bags, a 75 lb party needs 8 bags, and a 135 lb party needs 14 bags. Halve the count if you buy 20 lb bags.
Add 50 percent on top of your venue rate when food sits on ice, and use a separate cooler for it. A drinks cooler opened again and again melts fast, while a sealed food cooler keeps ice about twice as long.
Children drink about 60 percent of an adult portion, so plan about 1 lb per child indoors instead of 1.5 lb. In outdoor summer heat, still plan about 2 lb per child, since melt, not drinking, drives the number.
Buy bagged ice from a grocery store or gas station, usually 10 lb bags at 2 to 4 dollars each. Cubed ice from an ice machine looks cleaner but costs several times more per pound, which matters little for a drinks cooler nobody sees inside.
Buy ice on the day of the party, 2 to 4 hours before guests arrive. Bags left overnight in a home freezer fuse into solid blocks, and a home freezer cannot make enough cubes to matter for a party.