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

Systéme 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

20

160

320

 

denier or †scruple

1/5

3

24

192

384

*maille (d'estelin) or obole

2/3

2

5

40

320

640

 

*félin

2

1/3

4

10

80

640

1280

grain

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

Systéme 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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