Convert Quarters to Apothecary Drams
Convert Quarters (qr) to Apothecary Drams (dr ap) instantly and accurately.
Conversion Formula
dr ap = qr × 3266.666667
About Quarters
A quarter (qr) in the avoirdupois system equals 28 pounds or one quarter of a hundredweight - approximately 12.70 kg. Historically, quarters were used in British trade for measuring grain, wool, and other bulk commodities. The British quarter of grain (28 lb) was the standard purchase quantity at markets and mills throughout medieval and early modern England. In the US, the term 'quarter' sometimes refers to a quarter of a short hundredweight (25 lb) rather than the British 28 lb.
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
| Quarters (qr) | Apothecary Drams (dr ap) |
|---|---|
| 1 qr | 3266.67 dr ap |
| 2 qr | 6533.33 dr ap |
| 5 qr | 16333.3 dr ap |
| 10 qr | 32666.7 dr ap |
| 25 qr | 81666.7 dr ap |
| 50 qr | 163333 dr ap |
| 100 qr | 326667 dr ap |