Convert Kilogram to Dram (apothecary/troy)
Convert kilograms to drams (apothecary/troy) instantly. 1 kilogram = 257.205972549 dram (apothecary/troy) — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Dram (apothecary/troy) to Kilogram converter for the reverse conversion.
Units explained
Kilogram
The kilogram (kg) is the SI base unit of mass, defined by fixing the Planck constant h at 6.62607015E-34 J s.
From Greek 'khilioi' (thousand) plus 'gramma' (small weight).
The worldwide base unit of mass in science, commerce, and everyday life.
Adopted in 1795; redefined through the Planck constant on 20 May 2019.
Dram (apothecary/troy)
The apothecary (troy) dram equals one-eighth of a troy ounce, about 3.888 grams.
From the apothecaries' system rooted in the Greek 'drachma'.
Historical pharmacy and medicine compounding.
Part of the apothecaries' system of weights used through the 19th century.
Kilogram to Dram (apothecary/troy) conversion formula
The relationship between kilograms and drams (apothecary/troy):
To convert kilograms to drams (apothecary/troy), multiply the value in kilograms by 257.205972549. To reverse, multiply drams (apothecary/troy) by 0.0038879346.
How to use this converter
Type a value into the calculator. The result in drams (apothecary/troy) updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Dram (apothecary/troy) to Kilogram converter for the reverse direction.
Step-by-step: convert kilograms to drams (apothecary/troy)
- Write down the value in kilograms (kg).
- Multiply that value by the factor 257.205972549.
- The product is the equivalent value in drams (apothecary/troy) (dr ap).
- To reverse, multiply the dram (apothecary/troy) value by 0.0038879346.
Worked examples
Example 1 — Convert 1 kg to dr ap:
1 × 257.205972549 = 257.205972549 dr ap
Example 2 — Convert 100 kg to dr ap:
100 × 257.205972549 = 25720.5972549024 dr ap
Real-world example — Body height conversion (reverse direction)
You measure 1.75 kilograms tall and need to fill in a gym membership form or medical record that asks for height in drams (apothecary/troy). This is the most-used everyday length conversion in metric-using countries.
1.75 kg × 257.205972549 = 450.1104519608 dr ap
Real-world example — Pet and accessory dimensions
A 3-kilogram dog leash equals a tidy round value in drams (apothecary/troy). Pet-supply shopping frequently mixes the two units across product specifications.
3 kg × 257.205972549 = 771.6179176471 dr ap
Real-world example — Fabric and tailoring
One kilogram of fabric converts to a value in drams (apothecary/troy) commonly used for seam allowances. Garment patterns frequently switch between the two units on a single instruction sheet.
1 kg × 257.205972549 = 257.205972549 dr ap
Kilogram to Dram (apothecary/troy) conversion table
Standard reference values for converting kilograms to drams (apothecary/troy):
| Kilogram [kg] | Dram (apothecary/troy) [dr ap] |
|---|---|
| 0.01 | 2.5720597255 |
| 0.1 | 25.7205972549 |
| 1 | 257.205972549 |
| 2 | 514.411945098 |
| 3 | 771.6179176471 |
| 4 | 1028.8238901961 |
| 5 | 1286.0298627451 |
| 10 | 2572.0597254902 |
| 20 | 5144.1194509805 |
| 30 | 7716.1791764707 |
| 40 | 10288.238901961 |
| 50 | 12860.2986274512 |
| 100 | 25720.5972549024 |
| 500 | 128602.9862745119 |
| 1000 | 257205.9725490238 |
Frequently asked questions
How many drams (apothecary/troy) is 1 kilogram?
How do I convert kilograms to drams (apothecary/troy)?
How do I convert drams (apothecary/troy) back to kilograms?
How many drams (apothecary/troy) is 100 kilograms?
Popular weight unit conversions
Convert Kilogram to other weight units
Show all Kilogram conversions
Metric / SI (17 units)
Avoirdupois (15 units)
Troy & Apothecary (10 units)
Indian / South Asian (6 units)
Scientific / Atomic (9 units)
Astronomical (4 units)
Biblical / Ancient (14 units)
Sources & references
Conversion factor (1 kg = 257.205972549 dr ap) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Astronomical Union — System of Astronomical Constants
The IAU defines astronomical units including the AU (149597870700 m exactly) light-year and parsec used in astronomy and astrophysics.