How many kg in liter?

Answer 1

A litre is a unit of volume and a kilogram is a unit of mass (weight). You can not directly equate different units of measurement.

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The Units are not compatible, It depends upon the substance. The weight of a liter of a substance varies with the substance and, to a small extent, its temperature. A liter of Mercury weighs much more than a liter of water.

A typical answer is: 1 liter of water "weighs" 1 kilogram, but don't forget it's water at 3.98 degrees Celsius or 39.164 degrees Fahrenheit.

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There are two problems with this common answer, which is why I am not just changing the answer.

1. The kilogram is not a unit of weight, it is a unit of mass. So it is incorrect to say that a liter of water weighs one kilogram. In fact one liter of pure water has a mass of one kilogram.

2. Technically this conversion is not exact since the density of water changes depending on it's state. Since a liter is a unit of volume, then, since water expands when frozen, a liter of solid ice has less mass than a liter of liquid water. Water is maximally dense at near 4 degrees Celsius.
These are two different variables Kilograms is unit of mass, and liter is a unit of volume. To relate both you would need to know the density of the material. (Density = mass in kg/ volume in Liters)

However, for water at 4°C, one kilogram is the weight of 1 liter.

Answer 2

Kilogram is a measure of mass; the litre are a measure of volume.

1 Litre of water weighs approximately 1 Kg, but other substances weigh more or less.

1 Litre of sand weighs more, 1 Litre of air a lot less.

A litre is metric, you do not have to say 'metric litre'.

Answer 3

A litre of water weighs one kg. Different liquids may be more or less dense and a litre of them may weigh more or less.

Answer 4

Depends on the stuff your are using.

Answer 5

1.000028 kg

Answer 6

100