Reply to post: Too Bad About the Litre

Weight, what? The perfect kilogram is nearly in Planck's grasp

John Savard Silver badge

Too Bad About the Litre

If it weren't for the fact that the litre used to be 1.000028 cubic decimetres - that has since been redefined to be exactly 1 - the gram could be defined as the mass of one cubic centimetre of water. Which was its original definition back when the metric system was first invented. Of course, the trouble with that is that water dissolves nearly everything, at least to a small extent, and so maintaining pure water is difficult.

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