How much does a cubic foot of water weigh?

Answer 1

Answer #1:

This question is easier to solve by first converting the volume to cubic centimetres (millilitres), because 1 millilitre of water weighs 1 gram and 1 litre weighs 1 kilogram.

1 ft is 30.48 cm.

1 ft * 1 ft * 1 ft

= 30.48 cm * 30.48 cm * 30.48 cm

= 28,316.8466 cm3

Now, we divide that by 1000 to convert that to litres, and knowing that 1 L weighs 1 kg of water, we get the weight.

= 28.317 kg

If you want the answer in lbs, then multiply by the number of lbs in 1 kg.

28.317 kg * 2.205 lbs/kg

= 62.43 lbs

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Answer #2:

I have a method which I claim is even easier: Look it up and memorize it.

With that method, I have been using 62.4 pounds for many years.

It has worked for me, but I confess that I am only an engineer.

Answer 2

62.4 pounds