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Cubic feet can not be measured in pounds except in knowing the density of the item you are measuring. Cubic feet is a measurement of area or space, whereas pounds is a measurement of weight, both of which are not relative to each other except in knowing the material density (or a specific items weight versus the space given) of the item you are looking at.

For example, a cubic foot of the Earth's air at even temperature weighs virtually nothing, while a cubic foot of H2O (pure water) can weigh approximately 62 lbs.

To figure out the actual weight of anything based on it's spacial area would require a lot of information based on what is in the item, or just weighing the approximate size and subtracting the weight of the container from your answer.

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βˆ™ 15y ago
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βˆ™ 15y ago

It depends a lot on what you have a pound of.

If it's a pound of air . . . many cubic feet

A pound of feathers . . . less, but still a few cubic feet

A pound of water . . . only about 1.6% of one cubic foot

A pound of lead, stone, or gold . . . even less than that

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βˆ™ 13y ago

That depends on what's in the cubic foot.

If it's air, then it weighs only a fraction of a single pound.

If it's water, then it weighs about 62 pounds.

If it's stones or gold, then it weighs several hundred pounds.

If the cubic foot is empty, then it weighs no pounds at all.

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βˆ™ 12y ago

Pounds (lbs) is a unit of mass and cubic feet is a unit of volume.

You cannot convert the one to the other, they are incompatible units.

If you specify the density of the 0.5 cubic feet of material, then you will be able to calculate its mass.

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βˆ™ 9y ago

None, since there can be no such conversion.

A pound is a measure of mass. A cubic foot is a measure of volume. The two measure different things and, according to basic principles of dimensional analysis, conversion from one to the other is not valid. If you are not convinced, consider a cubic foot of water. How many pounds? Next consider a cubic foot of lead. How many pounds?

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βˆ™ 7y ago

There can be no conversion. A pound is a measure of mass. A cubic foot is a measure of volume. The two measure different things and, according to basic principles of dimensional analysis, conversion from one to the other is not valid. Consider a cubic foot of air. How many pounds? Next consider the same volume of lead. How many pounds? The masses of equal volumes of the two substances will clearly be very different. So there is no direct conversion between mass and volume: you need to know the density of the substance to enable you to carry out the conversion.

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βˆ™ 17y ago

5 cubic feet of water at 60°F will be 311.85 poiunds

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βˆ™ 12y ago

You would have to give the density of the substance to be able to answer such a question.

Pounds are a measure of mass, cubic feet are a measure of volume.

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βˆ™ 10y ago

You cannot compare VOLUME and WEIGHT unless you specify the density.

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Q: How many cubic feet equal a pound?
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