The apothecaries' system (apoth) of dry weights is used by pharmacists in drug formulation.
|
Unit
|
Number of Grains
|
Other
|
|
grain (gr)
|
1
|
0.0648 grams (64.8 mg)
|
|
scruple
|
20
|
|
|
dram
|
60
|
3 scruples
|
|
ounce (apoth)
|
480
|
8 drams
|
|
pound (apoth)
|
5,760
|
12 ounces (apoth)
|
where:
• A grain was based on a grain of wheat.
• 1 gram equals 15.43 grains
A pound by the apothecaries' system weighs 373.24 grams, while a pound by the avoirdupois weighs 453.59
