Q:

# How much does one liter of water weigh?

A:

A single liter of water weighs precisely one kilogram, or 2.20 pounds. This is because liters and kilograms have historically been defined in terms of one another.

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When the metric system was first developed by a group commissioned by France's Louis XVI, a unit of mass called the grave was defined as being the weight of a block of ice one liter in size. The grave was later renamed the liter by the French Republic after Louis XVI was disposed. In 1889, the kilogram was redefined as being the mass of an example weight of platinum-iridium kept in the International Bureau of Weights and Measures. In 1901, the liter was redefined as being the volume of pure water that has the same weight as that platinum-iridium mass. Since 1964, the liter has been defined as being a volume of water that weighs exactly one kilogram, or 2.20 pounds.

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## Related Questions

• A:

A liter of diesel weighs 0.8508 kilograms, or 1.8757 pounds. A U.S. gallon contains 3.79 liters. Therefore, a gallon of diesel fuel weighs 3.2245 kilograms, or 7.1089 pounds. An Imperial gallon contains 4.546 liters and weighs 3.8677 kilograms, or 8.5269 lbs.

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• A:

The weight of 1 liter of water is 1 kilogram. Volume of water is measured in liters, while the weight of solids is generally measured in kilograms. Water is often stored in containers, and the capacity of a container is always mentioned in liters.

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• A:

The density of water varies with temperature, thus the grams of water in 1 liter varies. While 1 gram per milliliter is the commonly reported value for the density of water, the actual value is less than this.