Convert Apothecary Drams to Carats
Convert Apothecary Drams (dr ap) to Carats (ct) instantly and accurately.
Conversion Formula
ct = dr ap × 19.439673
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 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.
Quick Reference Table
| Apothecary Drams (dr ap) | Carats (ct) |
|---|---|
| 1 dr ap | 19.4397 ct |
| 2 dr ap | 38.8793 ct |
| 5 dr ap | 97.1984 ct |
| 10 dr ap | 194.397 ct |
| 25 dr ap | 485.992 ct |
| 50 dr ap | 971.984 ct |
| 100 dr ap | 1943.97 ct |