Mass and Weight · Unit Converter

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

Convert stones (uk) to drams (apothecary/troy) instantly. 1 stone (uk) = 1633.3333333333 dram (apothecary/troy) — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Dram (apothecary/troy) to Stone (UK) 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 (UK)

What is a stone (uk)?

The UK stone (st) equals 14 pounds, about 6.35 kilograms.

Origin of the stone (uk)

From standardized market 'stones' once used for weighing goods.

Where it is used

Body weight in the United Kingdom and Ireland.

When and where it was developed

Fixed at 14 pounds by British statute in 1835.

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 (UK) to Dram (apothecary/troy) conversion formula

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

1 st = 1633.3333333333 dr ap
1 dr ap = 0.0006122449 st

To convert stones (uk) to drams (apothecary/troy), multiply the value in stones (uk) by 1633.3333333333. To reverse, multiply drams (apothecary/troy) by 0.0006122449.

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 (UK) converter for the reverse direction.

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

  1. Write down the value in stones (uk) (st).
  2. Multiply that value by the factor 1633.3333333333.
  3. The product is the equivalent value in drams (apothecary/troy) (dr ap).
  4. To reverse, multiply the dram (apothecary/troy) value by 0.0006122449.

Worked examples

Example 1 — Convert 1 st to dr ap:
1 × 1633.3333333333 = 1633.3333333333 dr ap

Example 2 — Convert 100 st to dr ap:
100 × 1633.3333333333 = 163333.3333333333 dr ap

Real-world example — Fabric and tailoring

One stone (uk) 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 × 1633.3333333333 = 1633.3333333333 dr ap

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

You measure 1.75 stones (uk) 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 × 1633.3333333333 = 2858.3333333333 dr ap

Real-world example — Pet and accessory dimensions

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

3 st × 1633.3333333333 = 4900 dr ap

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

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

Stone (UK) [st]Dram (apothecary/troy) [dr ap]
0.0116.3333333333
0.1163.3333333333
11633.3333333333
23266.6666666667
34900
46533.3333333333
58166.6666666667
1016333.3333333333
2032666.6666666667
3049000
4065333.3333333333
5081666.6666666667
100163333.3333333333
500816666.6666666666
10001633333.3333333333

Frequently asked questions

How many drams (apothecary/troy) is 1 stone (uk)?
1 stone (uk) equals 1633.3333333333 dram (apothecary/troy).
How do I convert stones (uk) to drams (apothecary/troy)?
Multiply the value in stones (uk) by 1633.3333333333 to get drams (apothecary/troy).
How do I convert drams (apothecary/troy) back to stones (uk)?
Multiply the value in drams (apothecary/troy) by 0.0006122449, or use the Dram (apothecary/troy) to Stone (UK) converter.
How many drams (apothecary/troy) is 100 stones (uk)?
100 stones (uk) equals 163333.3333333333 drams (apothecary/troy), because 100 × 1633.3333333333 = 163333.3333333333.

Convert Stone (UK) to other weight units

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

Sources & references

Conversion factor (1 st = 1633.3333333333 dr ap) verified against the following authoritative sources:

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