Emergency / Power Outages
A widely cited USDA figure is that 50 lbs of dry ice can keep a full 18 cubic foot freezer cold for about two days. Scale up or down for size, fullness and outage length.
A full freezer holds cold much better than a half-empty one.
The power outage calculator gives a planning range for your freezer size and outage length.
Dry ice releases carbon dioxide gas and requires proper ventilation. Handle only with insulated gloves, and never seal it in an airtight container.
Last reviewed: September 2026
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Power Outage Calculator
Dry ice for a freezer during an outage.
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5 lb Dry Ice Block
Built for applications that benefit from longer-lasting, concentrated cooling — a versatile option for food transport, coolers, emergency refrigeration, shipping and commercial use.
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