Mass and Weight · Unit Converter

Convert Dram (apothecary/troy) to Kilogram

Convert drams (apothecary/troy) to kilograms instantly. 1 dram (apothecary/troy) = 0.0038879346 kilogram — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Kilogram to Dram (apothecary/troy) converter for the reverse conversion.

Written by Sunith Babu L, Ph.D., Lead Engineer Reviewed by Dr. Ashok Kumar K, Ph.D.
Mass and Weight category 2 min read Published Last reviewed Updated

Units explained

Troy & Apothecary

Dram (apothecary/troy)

What is a dram (apothecary/troy)?

The apothecary (troy) dram equals one-eighth of a troy ounce, about 3.888 grams.

Origin of the dram (apothecary/troy)

From the apothecaries' system rooted in the Greek 'drachma'.

Where it is used

Historical pharmacy and medicine compounding.

When and where it was developed

Part of the apothecaries' system of weights used through the 19th century.

Metric / SI

Kilogram

What is a kilogram?

The kilogram (kg) is the SI base unit of mass, defined by fixing the Planck constant h at 6.62607015E-34 J s.

Origin of the kilogram

From Greek 'khilioi' (thousand) plus 'gramma' (small weight).

Where it is used

The worldwide base unit of mass in science, commerce, and everyday life.

When and where it was developed

Adopted in 1795; redefined through the Planck constant on 20 May 2019.

Dram (apothecary/troy) to Kilogram conversion formula

The relationship between drams (apothecary/troy) and kilograms:

1 dr ap = 0.0038879346 kg
1 kg = 257.205972549 dr ap

To convert drams (apothecary/troy) to kilograms, multiply the value in drams (apothecary/troy) by 0.0038879346. To reverse, multiply kilograms by 257.205972549.

How to use this converter

Type a value into the calculator. The result in kilograms updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Kilogram to Dram (apothecary/troy) converter for the reverse direction.

Step-by-step: convert drams (apothecary/troy) to kilograms

  1. Write down the value in drams (apothecary/troy) (dr ap).
  2. Multiply that value by the factor 0.0038879346.
  3. The product is the equivalent value in kilograms (kg).
  4. To reverse, multiply the kilogram value by 257.205972549.

Worked examples

Example 1 — Convert 1 dr ap to kg:
1 × 0.0038879346 = 0.0038879346 kg

Example 2 — Convert 100 dr ap to kg:
100 × 0.0038879346 = 0.38879346 kg

Real-world example — Children's height milestones

A 150-dram (apothecary/troy)-tall child measures a value in kilograms that's commonly used for theme-park ride height requirements when travelling between countries that use different measurement units.

150 dr ap × 0.0038879346 = 0.58319019 kg

Real-world example — Body height conversion

You enter your height as 180 drams (apothecary/troy) into an international job or visa application. The form then asks for the same value in kilograms — converting between these adjacent units is one of the most-used length conversions globally.

180 dr ap × 0.0038879346 = 0.699828228 kg

Real-world example — Furniture and large objects

A 72-dram (apothecary/troy) piece of furniture converts to a value in kilograms that's easier to mentally compare with room dimensions. This is the typical workflow when shopping internationally and product specs use a different unit than your room measurements.

72 dr ap × 0.0038879346 = 0.2799312912 kg

Dram (apothecary/troy) to Kilogram conversion table

Standard reference values for converting drams (apothecary/troy) to kilograms:

Dram (apothecary/troy) [dr ap]Kilogram [kg]
0.013.887935e-5
0.10.0003887935
10.0038879346
20.0077758692
30.0116638038
40.0155517384
50.019439673
100.038879346
200.077758692
300.116638038
400.155517384
500.19439673
1000.38879346
5001.9439673
10003.8879346

Frequently asked questions

How many kilograms is 1 dram (apothecary/troy)?
1 dram (apothecary/troy) equals 0.0038879346 kilogram.
How do I convert drams (apothecary/troy) to kilograms?
Multiply the value in drams (apothecary/troy) by 0.0038879346 to get kilograms.
How do I convert kilograms back to drams (apothecary/troy)?
Multiply the value in kilograms by 257.205972549, or use the Kilogram to Dram (apothecary/troy) converter.
How many kilograms is 100 drams (apothecary/troy)?
100 drams (apothecary/troy) equals 0.38879346 kilograms, because 100 × 0.0038879346 = 0.38879346.

Convert Dram (apothecary/troy) to other weight units

Show all Dram (apothecary/troy) conversions
Metric / SI (18 units)
Dram (apothecary/troy) to Attogram (ag) Dram (apothecary/troy) to Femtogram (fg) Dram (apothecary/troy) to Picogram (pg) Dram (apothecary/troy) to Nanogram (ng) Dram (apothecary/troy) to Microgram (µg) Dram (apothecary/troy) to Milligram (mg) Dram (apothecary/troy) to Centigram (cg) Dram (apothecary/troy) to Decigram (dg) Dram (apothecary/troy) to Gram (g) Dram (apothecary/troy) to Dekagram (dag) Dram (apothecary/troy) to Hectogram (hg) Dram (apothecary/troy) to Kilogram (kg) Dram (apothecary/troy) to Quintal (metric) (q) Dram (apothecary/troy) to Metric Ton (t) Dram (apothecary/troy) to Gigagram (Gg) Dram (apothecary/troy) to Teragram (Tg) Dram (apothecary/troy) to Petagram (Pg) Dram (apothecary/troy) to Exagram (Eg)
Avoirdupois (15 units)
Dram (apothecary/troy) to Grain (gr) Dram (apothecary/troy) to Dram (avoirdupois) (dr) Dram (apothecary/troy) to Ounce (oz) Dram (apothecary/troy) to Pound (lb) Dram (apothecary/troy) to Clove (clove) Dram (apothecary/troy) to Stone (US) (st) Dram (apothecary/troy) to Stone (UK) (st) Dram (apothecary/troy) to Quarter (US) (qr) Dram (apothecary/troy) to Quarter (UK) (qr) Dram (apothecary/troy) to Hundredweight (US) (cwt) Dram (apothecary/troy) to Hundredweight (UK) (cwt) Dram (apothecary/troy) to Wey (wey) Dram (apothecary/troy) to Kilopound (kip) (kip) Dram (apothecary/troy) to Ton (short, US) (sh tn) Dram (apothecary/troy) to Ton (long, UK) (long tn)
Troy & Apothecary (9 units)
Dram (apothecary/troy) to Point (1/100 carat) (pt) Dram (apothecary/troy) to Carat (metric) (ct) Dram (apothecary/troy) to Scruple (apothecary) (s ap) Dram (apothecary/troy) to Pennyweight (dwt) Dram (apothecary/troy) to Momme (mom) Dram (apothecary/troy) to Mace (mace) Dram (apothecary/troy) to Troy Ounce (oz t) Dram (apothecary/troy) to Tael (tael) Dram (apothecary/troy) to Pound (troy/apothecary) (lb t)
Indian / South Asian (6 units)
Dram (apothecary/troy) to Ratti (ratti) Dram (apothecary/troy) to Masha (masha) Dram (apothecary/troy) to Tola (tola) Dram (apothecary/troy) to Chittack (Chatank) (chittack) Dram (apothecary/troy) to Seer (Ser) (seer) Dram (apothecary/troy) to Maund (Mann) (maund)
Scientific / Atomic (9 units)
Dram (apothecary/troy) to Electron Mass (rest) (me) Dram (apothecary/troy) to MeV/c2 (MeV/c²) Dram (apothecary/troy) to Muon Mass (mµ) Dram (apothecary/troy) to Atomic Mass Unit (u) Dram (apothecary/troy) to Proton Mass (mp) Dram (apothecary/troy) to Neutron Mass (mn) Dram (apothecary/troy) to Deuteron Mass (md) Dram (apothecary/troy) to Carbon-12 Atom Mass (C-12) Dram (apothecary/troy) to Planck Mass (mP)
Astronomical (4 units)
Dram (apothecary/troy) to Lunar Mass (Moon) (M☾) Dram (apothecary/troy) to Earth's Mass (M⊕) Dram (apothecary/troy) to Jupiter Mass (MJ) Dram (apothecary/troy) to Sun's Mass (M☉)
Biblical / Ancient (14 units)
Dram (apothecary/troy) to Lepton (Biblical Roman) (lepton) Dram (apothecary/troy) to Quadrans (Biblical Roman) (quadrans) Dram (apothecary/troy) to Assarion (Biblical Roman) (assarion) Dram (apothecary/troy) to Gerah (Biblical Hebrew) (gerah) Dram (apothecary/troy) to Drachma (Biblical Greek) (drachma) Dram (apothecary/troy) to Denarius (Biblical Roman) (denarius) Dram (apothecary/troy) to Bekan (Biblical Hebrew) (bekah) Dram (apothecary/troy) to Didrachma (Biblical Greek) (didrachma) Dram (apothecary/troy) to Shekel (Biblical Hebrew) (shekel) Dram (apothecary/troy) to Tetradrachma (Biblical Greek) (tetra) Dram (apothecary/troy) to Mina (Biblical Greek) (mina) Dram (apothecary/troy) to Mina (Biblical Hebrew) (mina) Dram (apothecary/troy) to Talent (Biblical Greek) (talent) Dram (apothecary/troy) to Talent (Biblical Hebrew) (talent)
Force / Engineering (5 units)
Dram (apothecary/troy) to Poundal (pdl) Dram (apothecary/troy) to Ton (assay) (US) (AT) Dram (apothecary/troy) to Ton (assay) (UK) (AT) Dram (apothecary/troy) to Kilogram-force square second/meter (hyl) Dram (apothecary/troy) to Slug (slug)

Sources & references

Conversion factor (1 dr ap = 0.0038879346 kg) verified against the following authoritative sources:

Results are provided for general reference. Verify critical measurements against an authoritative standard.