Convert Ounces to Apothecary Drams
Convert Ounces (oz) to Apothecary Drams (dr ap) instantly and accurately.
Conversion Formula
dr ap = oz × 7.291666667
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.
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.
Quick Reference Table
| Ounces (oz) | Apothecary Drams (dr ap) |
|---|---|
| 1 oz | 7.29167 dr ap |
| 2 oz | 14.5833 dr ap |
| 5 oz | 36.4583 dr ap |
| 10 oz | 72.9167 dr ap |
| 25 oz | 182.292 dr ap |
| 50 oz | 364.583 dr ap |
| 100 oz | 729.167 dr ap |