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France
pre-metric units of mass, livre and smaller

Contents

Charlemagne

Poids de marc, mid 14th - late 18th centuries

gold and silver

commodities

Old names given metric units, 1810 – 1812

Système Usuel, 1812 – 1840

The metric equivalents given are sometimes rounded off to fit the space available. A more exact equivalent may be given on the page for that unit.

Late 8th – mid 14th century

				livre esterlin
				once	12
			sou	1 ²⁄₃	20
		denier	12	20	240
	obol	2	24	40	480
grain	12	24	288	480	5760
63.7 mg	0.76 g	1.53 g	18.4 g	30.6 g	367.1 g

Poids de marc, mid 14th – late 18th century

Units marked with an asterisk for gold and silver, with a dagger were apothecaries weights.

					livre poids de marc de Paris
								marc	2
							once	8	16
				gros or †drachm			8	64	128
				*estelin		2½	20	160	320
		denier or †scruple			1 ¹/₅	3	24	192	384
*maille (d'estelin) or obole				1 ²/₃	2	5	40	320	640
		*félin	2	3 ¹/₃	4	10	80	640	1280
	grain	7 ¹/₅	14 ²/₅	24	28 ⁴/₅	72	576	4608	9216
prime or carob	24	172.8	345.6	576	691.2	1728	13,824	110,592	221,184
2.2 mg	53 mg	382 mg	765 mg	1.27 g	1.53 g	3.8 g	30.6 g	244.753 g	489.5 g

* units used for gold and silver † apothecary units

					livre
			demi-livre		2
		quarteron		2	4
	demiquarteron		2	4	8
	once	2	4	8	16
demionce	2	4	8	16	32
15.3 g	30.6 g	61.2 g	122.4 g	244.8 g	489.5 g

Old names given to metric units, 1800 – 1812

By the decree of 13 Brumaire an IX.

				livre
		once metrique		10
		gros	10	100
	denier	10	100	1000
grain	10	100	1000	10,000
0.1 g	1 g	10 g	100 g	1000 g

Système Usuel, 1812 – 1840

By the decree of 28 March 1812. Abolished by an act of 4 July 1837, effective 1 January 1840.

				livre usuelle
			marc usuel		2
		quarternon		2	4
	once usuelle		4	8	16
	gros	8	32	64	128
grain nouvelle	72	576	2304	4608	9216
54.25 mg	3.91 g	31.25 g	125 g	250 g	500 g

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Last revised: 16 March 2001.