Dry ice sublimates at the rate of approximately 10 pounds every 24 hours when stored in a quality cooler. The following are some approximate cooling times based on using dry ice wrapped in an insulated container.

Pounds of Dry Ice Approximate Cooling Time
5 to 7 pounds 18 to 24 Hours
8 to 12 pounds 24 to 40 Hours
13 to 20 pounds 40 to 60  Hours