Convert Troy Ounces to Apothecary Drams
Convert Troy Ounces (ozt) to Apothecary Drams (dr ap) instantly and accurately.
Conversion Formula
dr ap = ozt × 8
About Troy Ounces
The troy ounce (ozt or oz t) is the global standard for weighing and pricing precious metals - gold, silver, platinum, and palladium. Equal to 31.1034768 grams (about 10% heavier than the avoirdupois ounce), it originates from the medieval fair at Troyes, France, where a standardised weight system facilitated international trade. All gold spot prices quoted on financial markets (LBMA, COMEX, MCX) are priced per troy ounce. A standard 'Good Delivery' gold bar approved by the London Bullion Market Association weighs approximately 400 troy ounces (12.4 kg).
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
| Troy Ounces (ozt) | Apothecary Drams (dr ap) |
|---|---|
| 1 ozt | 8 dr ap |
| 2 ozt | 16 dr ap |
| 5 ozt | 40 dr ap |
| 10 ozt | 80 dr ap |
| 25 ozt | 200 dr ap |
| 50 ozt | 400 dr ap |
| 100 ozt | 800 dr ap |