UK Apothecaries' Weight Units Converter

From:	To:
pound [lb apoth.] ounce [oz apoth.] drachm [dr apoth.] scruple [scr apoth.] grain [gr apoth.]	pound [lb apoth.] ounce [oz apoth.] drachm [dr apoth.] scruple [scr apoth.] grain [gr apoth.]
1 [lb apoth.] = 0.3732417216 [kg]

The units of weight (mass) of the apothecaries system were used by pharmacists for drugs and mericinal prepartions, since the small magnitudes better represented the quantities used in this profession. In this system, the base unit is apothecaries' ounce and was equal to the troy ounce. These units were legalized by the Medical Education Acts of 1858 and 1862, but are now obsolete and their use is prohibited by the British and American Pharmacopoeia.
Besides these units there are also units that wer used for liquid substance. The parallel system of apothecaries measure was used for liquid substance. In this system, analogous to imperial capacity measure, 60 minims was equal to one fluid drachm, which was one eight of the fluid ounce.