Mass and Weight · Unit Converter

Convert Dram (avoirdupois) to Stone (US)

Convert drams (avoirdupois) to stones (us) instantly. 1 dram (avoirdupois) = 0.0003125 stone (us) — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Stone (US) to Dram (avoirdupois) 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

Avoirdupois

Dram (avoirdupois)

What is a dram (avoirdupois)?

The avoirdupois dram (dr) equals one-sixteenth of an ounce, about 1.77 grams.

Origin of the dram (avoirdupois)

From Greek 'drachma' through Latin 'dragma'.

Where it is used

Historically pharmacy; today occasional cooking and firearms (powder) use.

When and where it was developed

Defined as 1/256 of the avoirdupois pound.

Avoirdupois

Stone (US)

What is a stone (us)?

A less common US definition of the stone, about 5.67 kilograms.

Origin of the stone (us)

A variant stone weight used in some historical US trade.

Where it is used

Rare; appears mainly in historical or specialized contexts.

When and where it was developed

Derived from older English stone weights that varied by commodity.

Dram (avoirdupois) to Stone (US) conversion formula

The relationship between drams (avoirdupois) and stones (us):

1 dr = 0.0003125 st
1 st = 3199.9999915342 dr

To convert drams (avoirdupois) to stones (us), multiply the value in drams (avoirdupois) by 0.0003125. To reverse, multiply stones (us) by 3199.9999915342.

How to use this converter

Type a value into the calculator. The result in stones (us) updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Stone (US) to Dram (avoirdupois) converter for the reverse direction.

Step-by-step: convert drams (avoirdupois) to stones (us)

  1. Write down the value in drams (avoirdupois) (dr).
  2. Multiply that value by the factor 0.0003125.
  3. The product is the equivalent value in stones (us) (st).
  4. To reverse, multiply the stone (us) value by 3199.9999915342.

Worked examples

Example 1 — Convert 1 dr to st:
1 × 0.0003125 = 0.0003125 st

Example 2 — Convert 100 dr to st:
100 × 0.0003125 = 0.0312500001 st

Real-world example — Furniture and large objects

A 72-dram (avoirdupois) piece of furniture converts to a value in stones (us) 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 × 0.0003125 = 0.0225000001 st

Real-world example — Children's height milestones

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

150 dr × 0.0003125 = 0.0468750001 st

Real-world example — Body height conversion

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

180 dr × 0.0003125 = 0.0562500001 st

Dram (avoirdupois) to Stone (US) conversion table

Standard reference values for converting drams (avoirdupois) to stones (us):

Dram (avoirdupois) [dr]Stone (US) [st]
0.013.125e-6
0.13.125e-5
10.0003125
20.000625
30.0009375
40.00125
50.0015625
100.003125
200.00625
300.009375
400.0125
500.015625
1000.0312500001
5000.1562500004
10000.3125000008

Frequently asked questions

How many stones (us) is 1 dram (avoirdupois)?
1 dram (avoirdupois) equals 0.0003125 stone (us).
How do I convert drams (avoirdupois) to stones (us)?
Multiply the value in drams (avoirdupois) by 0.0003125 to get stones (us).
How do I convert stones (us) back to drams (avoirdupois)?
Multiply the value in stones (us) by 3199.9999915342, or use the Stone (US) to Dram (avoirdupois) converter.
How many stones (us) is 100 drams (avoirdupois)?
100 drams (avoirdupois) equals 0.0312500001 stones (us), because 100 × 0.0003125 = 0.0312500001.

Convert Dram (avoirdupois) to other weight units

Show all Dram (avoirdupois) conversions
Metric / SI (18 units)
Dram (avoirdupois) to Attogram (ag) Dram (avoirdupois) to Femtogram (fg) Dram (avoirdupois) to Picogram (pg) Dram (avoirdupois) to Nanogram (ng) Dram (avoirdupois) to Microgram (µg) Dram (avoirdupois) to Milligram (mg) Dram (avoirdupois) to Centigram (cg) Dram (avoirdupois) to Decigram (dg) Dram (avoirdupois) to Gram (g) Dram (avoirdupois) to Dekagram (dag) Dram (avoirdupois) to Hectogram (hg) Dram (avoirdupois) to Kilogram (kg) Dram (avoirdupois) to Quintal (metric) (q) Dram (avoirdupois) to Metric Ton (t) Dram (avoirdupois) to Gigagram (Gg) Dram (avoirdupois) to Teragram (Tg) Dram (avoirdupois) to Petagram (Pg) Dram (avoirdupois) to Exagram (Eg)
Avoirdupois (14 units)
Dram (avoirdupois) to Grain (gr) Dram (avoirdupois) to Ounce (oz) Dram (avoirdupois) to Pound (lb) Dram (avoirdupois) to Clove (clove) Dram (avoirdupois) to Stone (US) (st) Dram (avoirdupois) to Stone (UK) (st) Dram (avoirdupois) to Quarter (US) (qr) Dram (avoirdupois) to Quarter (UK) (qr) Dram (avoirdupois) to Hundredweight (US) (cwt) Dram (avoirdupois) to Hundredweight (UK) (cwt) Dram (avoirdupois) to Wey (wey) Dram (avoirdupois) to Kilopound (kip) (kip) Dram (avoirdupois) to Ton (short, US) (sh tn) Dram (avoirdupois) to Ton (long, UK) (long tn)
Troy & Apothecary (10 units)
Dram (avoirdupois) to Point (1/100 carat) (pt) Dram (avoirdupois) to Carat (metric) (ct) Dram (avoirdupois) to Scruple (apothecary) (s ap) Dram (avoirdupois) to Pennyweight (dwt) Dram (avoirdupois) to Momme (mom) Dram (avoirdupois) to Mace (mace) Dram (avoirdupois) to Dram (apothecary/troy) (dr ap) Dram (avoirdupois) to Troy Ounce (oz t) Dram (avoirdupois) to Tael (tael) Dram (avoirdupois) to Pound (troy/apothecary) (lb t)
Indian / South Asian (6 units)
Dram (avoirdupois) to Ratti (ratti) Dram (avoirdupois) to Masha (masha) Dram (avoirdupois) to Tola (tola) Dram (avoirdupois) to Chittack (Chatank) (chittack) Dram (avoirdupois) to Seer (Ser) (seer) Dram (avoirdupois) to Maund (Mann) (maund)
Scientific / Atomic (9 units)
Dram (avoirdupois) to Electron Mass (rest) (me) Dram (avoirdupois) to MeV/c2 (MeV/c²) Dram (avoirdupois) to Muon Mass (mµ) Dram (avoirdupois) to Atomic Mass Unit (u) Dram (avoirdupois) to Proton Mass (mp) Dram (avoirdupois) to Neutron Mass (mn) Dram (avoirdupois) to Deuteron Mass (md) Dram (avoirdupois) to Carbon-12 Atom Mass (C-12) Dram (avoirdupois) to Planck Mass (mP)
Astronomical (4 units)
Dram (avoirdupois) to Lunar Mass (Moon) (M☾) Dram (avoirdupois) to Earth's Mass (M⊕) Dram (avoirdupois) to Jupiter Mass (MJ) Dram (avoirdupois) to Sun's Mass (M☉)
Biblical / Ancient (14 units)
Dram (avoirdupois) to Lepton (Biblical Roman) (lepton) Dram (avoirdupois) to Quadrans (Biblical Roman) (quadrans) Dram (avoirdupois) to Assarion (Biblical Roman) (assarion) Dram (avoirdupois) to Gerah (Biblical Hebrew) (gerah) Dram (avoirdupois) to Drachma (Biblical Greek) (drachma) Dram (avoirdupois) to Denarius (Biblical Roman) (denarius) Dram (avoirdupois) to Bekan (Biblical Hebrew) (bekah) Dram (avoirdupois) to Didrachma (Biblical Greek) (didrachma) Dram (avoirdupois) to Shekel (Biblical Hebrew) (shekel) Dram (avoirdupois) to Tetradrachma (Biblical Greek) (tetra) Dram (avoirdupois) to Mina (Biblical Greek) (mina) Dram (avoirdupois) to Mina (Biblical Hebrew) (mina) Dram (avoirdupois) to Talent (Biblical Greek) (talent) Dram (avoirdupois) to Talent (Biblical Hebrew) (talent)
Force / Engineering (5 units)
Dram (avoirdupois) to Poundal (pdl) Dram (avoirdupois) to Ton (assay) (US) (AT) Dram (avoirdupois) to Ton (assay) (UK) (AT) Dram (avoirdupois) to Kilogram-force square second/meter (hyl) Dram (avoirdupois) to Slug (slug)

Sources & references

Conversion factor (1 dr = 0.0003125 st) verified against the following authoritative sources:

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