Convert Apothecary Drams to Apothecary Ounces
Convert Apothecary Drams (dr ap) to Apothecary Ounces (oz ap) instantly and accurately.
Conversion Formula
oz ap = dr ap × 0.125
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 Apothecary Ounces
An apothecary ounce (oz ap) is identical in mass to the troy ounce - approximately 31.10 grams - and equals 8 apothecary drams or 480 grains. It was the standard ounce used by pharmacists and physicians across Europe and North America from medieval times until the 20th century. Although the apothecary system has been replaced by SI units in modern medicine, the apothecary ounce still appears in historical pharmacopeias, traditional herbal medicine texts, and some compounding pharmacy references.
Quick Reference Table
| Apothecary Drams (dr ap) | Apothecary Ounces (oz ap) |
|---|---|
| 1 dr ap | 0.125 oz ap |
| 2 dr ap | 0.25 oz ap |
| 5 dr ap | 0.625 oz ap |
| 10 dr ap | 1.25 oz ap |
| 25 dr ap | 3.125 oz ap |
| 50 dr ap | 6.25 oz ap |
| 100 dr ap | 12.5 oz ap |