Convert Apothecary Drams to Troy Pounds
Convert Apothecary Drams (dr ap) to Troy Pounds (lb t) instantly and accurately.
Conversion Formula
lb t = dr ap × 0.01041666667
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 Troy Pounds
A troy pound (lb t) equals 12 troy ounces or 5,760 grains - approximately 373.24 grams. It is lighter than the common avoirdupois pound (453.59 g) because the troy system divides the pound into 12 ounces rather than 16. Historically used across Europe for trade in precious metals and pharmaceuticals, the troy pound was the legal standard in England from the 15th century until 1878. In the United States, the troy pound was once the official standard for coinage but was abolished for commercial use in 1828.
Quick Reference Table
| Apothecary Drams (dr ap) | Troy Pounds (lb t) |
|---|---|
| 1 dr ap | 0.0104167 lb t |
| 2 dr ap | 0.0208333 lb t |
| 5 dr ap | 0.0520833 lb t |
| 10 dr ap | 0.104167 lb t |
| 25 dr ap | 0.260417 lb t |
| 50 dr ap | 0.520833 lb t |
| 100 dr ap | 1.04167 lb t |