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The original French metric system used the litre as a base unit. The word litre is derived from an older French unit, the litron, whose name came from Byzantine Greek—where it was a unit of weight, not volume [2] —via Late Medieval Latin, and which equalled approximately 0.831
In the Ancien régime and until 1795, France used a system of measures that had many of the characteristics of the modern Imperial System of units but with no unified system. There was widespread abuse of the king's standards, to the extent that the lieue could vary from 3.268 km in Beauce to 5.849 km in Provence .
demi in French means "half": in this case, half a chopine, and – coincidentally – also approximately half a US pint [237 ml]. chopine: 1 ⁄ 2 ~476.1 ml ~1 pint ~0.84 pint pinte: 1 ~952.1 ml ~2.01 pint ~1.68 pint Although etymologically related to the English unit pint, the French pint is about twice as
Mesures usuelles (French for customary measures) were a system of measurement introduced as a compromise between the metric system and traditional measurements. It was used in France from 1812 to 1839. A number of variations on the metric system have been in use.
The International System of Units, internationally known by the abbreviation SI (from French Système international d'unités), is the modern form of the metric system and the world's most widely used system of measurement. It is the only system of measurement with official status in nearly every country in the world, employed in science ...
The metric system is a decimal-based system of measurement. The current international standard for the metric system is the International System of Units (Système international d'unités or SI), in which all units can be expressed in terms of seven base units: the metre (m), kilogram (kg), second (s), ampere (A), kelvin (K), mole (mol), and ...
French units could refer to any of: Units of measurement in France before the French Revolution, used in France until 1795. Mesures usuelles, used in France until 1839. The International System of Units, the present-day metric system of units. The French catheter scale, used for measuring the diameters of medical catheters.
On 7 April 1795, the metric system was formally defined in French law using six units. Three of these are related to volume: the stère (1 m 3) for volume of firewood; the litre (1 dm 3) for volumes of liquid; and the gramme, for mass—defined as the mass of one cubic centimetre of water at the temperature of melting ice. [10]