Convert Apothecary Drams to Ounces
Convert Apothecary Drams (dr ap) to Ounces (oz) instantly and accurately.
Conversion Formula
oz = dr ap × 0.1371428571
About Apothecary Drams
An apothecary dram (dr ap) equals 3 scruples or 60 grains - approximately 3.888 grams. Part of the traditional apothecary system used by physicians and pharmacists from the Middle Ages through the 19th century, it was the standard unit for prescribing and dispensing medicines. Prescriptions written in the apothecary system used special symbols: the dram symbol (℈) and ounce symbol (℥) appear throughout historical medical records and old pharmacy ledgers. The apothecary dram differs from the fluid dram (a volume unit) and from the avoirdupois dram.
About Ounces
The avoirdupois ounce (oz) is 1/16 of a pound, equal to approximately 28.35 grams. It is the everyday ounce used in the United States and United Kingdom for food portions, household quantities, and general trade. US food packages, recipe measurements, and nutrition labels reference ounces; a standard stick of butter is 4 oz, a can of soup typically 10.75 oz, and a baseball weighs 5-5.25 oz. Unlike the troy ounce (31.10 g) used for precious metals, the avoirdupois ounce (28.35 g) is lighter.
Quick Reference Table
| Apothecary Drams (dr ap) | Ounces (oz) |
|---|---|
| 1 dr ap | 0.137143 oz |
| 2 dr ap | 0.274286 oz |
| 5 dr ap | 0.685714 oz |
| 10 dr ap | 1.37143 oz |
| 25 dr ap | 3.42857 oz |
| 50 dr ap | 6.85714 oz |
| 100 dr ap | 13.7143 oz |