How much does water weigh?

Answer 1

1 kilogram per liter

1000 kilogram per m3

1 gram per milliliter

8.34 lbs per gallon

How much and where is it?

The question as it is currently written shows a lack of understanding of weight, mass, and volume. One might the question with the question How much water? or How much water and on what planet? The real question here is instead what is the density of water, which is the mass of water per unit volume.

The weight of any object or substance depends upon how much matter there is and where it is because weight is a dependent on gravity. The weight of, say, a gallon of water on the surface of the Earth is greater than the same amount of water on the moon. Put another way, a quart of water on Earth might weigh as much as a gallon of water on the moon because there is much less gravity on the moon.

So, assuming you want to know how much a gallon of water weighs here on Earth, figure about 8.34 pounds. See the related questions for more s to your question.

The density is the mass of water divided by its volume. Since mass doesn't depend on gravity, the mass of an equal volume of water is the same everywhere. The density of water is 1 gram per milliliter (or equivalently 1 kilogram per liter). The density of water does depend on temperature however. The value of 1 kg/L is for water at 24 °C.