Convert Carats to Apothecary Drams
Convert Carats (ct) to Apothecary Drams (dr ap) instantly and accurately.
Conversion Formula
dr ap = ct × 0.05144119451
About Carats
A metric carat (ct or CD) is exactly 200 milligrams (0.2 g), the universal standard for weighing gemstones. Established internationally in 1907, it replaced fractionally different regional carat weights previously used in different countries. The total weight of a diamond or colored gemstone is always expressed in carats: a 1.00 ct diamond of excellent cut and color can command over $5,000. The Cullinan diamond, the largest gem-quality rough diamond ever found, weighed 3,106.75 carats.
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
| Carats (ct) | Apothecary Drams (dr ap) |
|---|---|
| 1 ct | 0.0514412 dr ap |
| 2 ct | 0.102882 dr ap |
| 5 ct | 0.257206 dr ap |
| 10 ct | 0.514412 dr ap |
| 25 ct | 1.28603 dr ap |
| 50 ct | 2.57206 dr ap |
| 100 ct | 5.14412 dr ap |