Mass and Weight · Unit Converter

Convert Stone (US) to Dram (apothecary/troy)

Convert stones (us) to drams (apothecary/troy) instantly. 1 stone (us) = 1458.3333333333 dram (apothecary/troy) — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Dram (apothecary/troy) to Stone (US) 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

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.

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.

Stone (US) to Dram (apothecary/troy) conversion formula

The relationship between stones (us) and drams (apothecary/troy):

1 st = 1458.3333333333 dr ap
1 dr ap = 0.0006857143 st

To convert stones (us) to drams (apothecary/troy), multiply the value in stones (us) by 1458.3333333333. To reverse, multiply drams (apothecary/troy) by 0.0006857143.

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 Stone (US) converter for the reverse direction.

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

  1. Write down the value in stones (us) (st).
  2. Multiply that value by the factor 1458.3333333333.
  3. The product is the equivalent value in drams (apothecary/troy) (dr ap).
  4. To reverse, multiply the dram (apothecary/troy) value by 0.0006857143.

Worked examples

Example 1 — Convert 1 st to dr ap:
1 × 1458.3333333333 = 1458.3333333333 dr ap

Example 2 — Convert 100 st to dr ap:
100 × 1458.3333333333 = 145833.3333333333 dr ap

Real-world example — Fabric and tailoring

One stone (us) 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 st × 1458.3333333333 = 1458.3333333333 dr ap

Real-world example — Body height conversion (reverse direction)

You measure 1.75 stones (us) 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 st × 1458.3333333333 = 2552.0833333333 dr ap

Real-world example — Pet and accessory dimensions

A 3-stone (us) dog leash equals a tidy round value in drams (apothecary/troy). Pet-supply shopping frequently mixes the two units across product specifications.

3 st × 1458.3333333333 = 4375 dr ap

Stone (US) to Dram (apothecary/troy) conversion table

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

Stone (US) [st]Dram (apothecary/troy) [dr ap]
0.0114.5833333333
0.1145.8333333333
11458.3333333333
22916.6666666667
34375
45833.3333333333
57291.6666666667
1014583.3333333333
2029166.6666666667
3043750
4058333.3333333333
5072916.6666666667
100145833.3333333333
500729166.6666666666
10001458333.3333333333

Frequently asked questions

How many drams (apothecary/troy) is 1 stone (us)?
1 stone (us) equals 1458.3333333333 dram (apothecary/troy).
How do I convert stones (us) to drams (apothecary/troy)?
Multiply the value in stones (us) by 1458.3333333333 to get drams (apothecary/troy).
How do I convert drams (apothecary/troy) back to stones (us)?
Multiply the value in drams (apothecary/troy) by 0.0006857143, or use the Dram (apothecary/troy) to Stone (US) converter.
How many drams (apothecary/troy) is 100 stones (us)?
100 stones (us) equals 145833.3333333333 drams (apothecary/troy), because 100 × 1458.3333333333 = 145833.3333333333.

Convert Stone (US) to other weight units

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

Sources & references

Conversion factor (1 st = 1458.3333333333 dr ap) verified against the following authoritative sources:

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