Convert Kilograms to Apothecary Drams
Convert Kilograms (kg) to Apothecary Drams (dr ap) instantly and accurately.
Conversion Formula
dr ap = kg × 257.2059725
About Kilograms
The kilogram (kg) is the SI base unit of mass - the fundamental unit from which all other mass measurements in the metric system are derived. Since 2019 it has been defined by fixing the Planck constant h to exactly 6.62607015 × 10⁻³⁴ J·s, replacing the 130-year-old International Prototype Kilogram (a platinum-iridium cylinder kept in Sèvres, France). The kilogram governs daily life worldwide: body weight in most countries, grocery shopping, luggage allowances, postal rates, freight pricing, and ingredient quantities in cooking all reference kilograms.
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
| Kilograms (kg) | Apothecary Drams (dr ap) |
|---|---|
| 1 kg | 257.206 dr ap |
| 2 kg | 514.412 dr ap |
| 5 kg | 1286.03 dr ap |
| 10 kg | 2572.06 dr ap |
| 25 kg | 6430.15 dr ap |
| 50 kg | 12860.3 dr ap |
| 100 kg | 25720.6 dr ap |