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1 cubic foot = (12 x 12 x 12) = 1,728 cubic inches

1 gallon = 231 cubic inches

3 gallons = (3 x 231 / 1,728) = 0.40104 cubic foot (rounded)

Handy thing to remember: 1 cubic foot = roughly 7.5 gallons Using this handy approximation, 3 gallons = (3 / 7.5) = 0.4 cubic foot, which is pretty close.

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15y ago

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