Entry
The adoption of the metric system — The law of 18 Germinal Year III (1795), founding the system of weights and measures
« Two weights, two measures »: the cahiers de doléances demanded a single measure for the whole kingdom. The Convention adopted a system drawn from the Earth itself — the metre, ten-millionth part of a quarter meridian. It became compulsory only in 1840. (Editorial synthesis)
The adoption of the metric system took place on 7 April 1795. (source: Encyclopædia Universalis)
The adoption of the metric system ended in a set of measures based on the metre. (source: Larousse)
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