Q:

# How much does a cubic foot of ice weigh?

A:

A cubic foot of ice weighs 57.2 pounds, more than 5 pounds less than a cubic foot of water. Unlike most other substances, ice expands as it freezes.

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Credit: Jennifer Boyer CC-BY 2.0

Because ice is less dense than water, it floats on the surface of water as it forms. If it became denser, like most other substances, it would sink to the bottom of ponds and lakes. During the cold months, these bodies of water would become solid blocks of ice, so thick that even the warmest of days would transform the surface to slush.

The weight of ice and snow on a roof has the potential to cause winter disasters. While snow, which is a crystalline form of ice, is lighter in weight than solid ice, each cubic foot of snow adds 17 pounds per square inch to the roof. Homes in areas prone to heavy snowfall require special engineering to support the load.

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## Related Questions

• A:

A cubic foot of steel weighs about 490 pounds. The metal weighs 0.2904 pounds per cubic inch. Steel weight formulas are based on theoretical nominal weights and only give approximate values.

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• A:

One cubic foot of newly fallen snow in calm conditions weighs 3.12 to 4.37 pounds, while 1 cubic foot of damp new snow weighs 6.24 to 12.49 pounds. The density of snow varies with its dampness and other conditions.

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• A:

A cubic foot of water weighs 62.4 pounds and a cubic foot of ice weighs 57.2 pounds. This makes ice lighter than water.