Mass and Weight · Unit Converter

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

Convert stones (us) to pounds (troy/apothecary) instantly. 1 stone (us) = 15.1909722222 pound (troy/apothecary) — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Pound (troy/apothecary) 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

Pound (troy/apothecary)

What is a pound (troy/apothecary)?

The troy (apothecary) pound equals 12 troy ounces, about 373.24 grams.

Origin of the pound (troy/apothecary)

Named for Troyes, France, a major medieval trade-fair town.

Where it is used

Historical pricing of precious metals; now largely superseded by the troy ounce.

When and where it was developed

Adopted as the English coinage standard under Henry VIII in 1528.

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

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

1 st = 15.1909722222 lb t
1 lb t = 0.0658285714 st

To convert stones (us) to pounds (troy/apothecary), multiply the value in stones (us) by 15.1909722222. To reverse, multiply pounds (troy/apothecary) by 0.0658285714.

How to use this converter

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

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

  1. Write down the value in stones (us) (st).
  2. Multiply that value by the factor 15.1909722222.
  3. The product is the equivalent value in pounds (troy/apothecary) (lb t).
  4. To reverse, multiply the pound (troy/apothecary) value by 0.0658285714.

Worked examples

Example 1 — Convert 1 st to lb t:
1 × 15.1909722222 = 15.1909722222 lb t

Example 2 — Convert 100 st to lb t:
100 × 15.1909722222 = 1519.0972222222 lb t

Real-world example — Adult height conversion

A 1.8-stone (us)-tall person measures a value in pounds (troy/apothecary) that converts the height to the unit favoured by American forms, schools, or driver's licences. This is daily routine for anyone living between metric and imperial systems.

1.8 st × 15.1909722222 = 27.34375 lb t

Real-world example — Fabric purchase length

Two stones (us) of fabric equals a value in pounds (troy/apothecary) essential for tailors and textile buyers sourcing material from international suppliers that quote in different units.

2 st × 15.1909722222 = 30.3819444444 lb t

Real-world example — Maritime depth conversion

A 10-stone (us) sounding depth converts cleanly into pounds (troy/apothecary). Recreational divers and sailors translate between the two units whenever they read legacy charts against modern depth-sounder displays.

10 st × 15.1909722222 = 151.9097222222 lb t

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

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

Stone (US) [st]Pound (troy/apothecary) [lb t]
0.010.1519097222
0.11.5190972222
115.1909722222
230.3819444444
345.5729166667
460.7638888889
575.9548611111
10151.9097222222
20303.8194444444
30455.7291666667
40607.6388888889
50759.5486111111
1001519.0972222222
5007595.4861111111
100015190.9722222222

Frequently asked questions

How many pounds (troy/apothecary) is 1 stone (us)?
1 stone (us) equals 15.1909722222 pound (troy/apothecary).
How do I convert stones (us) to pounds (troy/apothecary)?
Multiply the value in stones (us) by 15.1909722222 to get pounds (troy/apothecary).
How do I convert pounds (troy/apothecary) back to stones (us)?
Multiply the value in pounds (troy/apothecary) by 0.0658285714, or use the Pound (troy/apothecary) to Stone (US) converter.
How many pounds (troy/apothecary) is 100 stones (us)?
100 stones (us) equals 1519.0972222222 pounds (troy/apothecary), because 100 × 15.1909722222 = 1519.0972222222.

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 = 15.1909722222 lb t) verified against the following authoritative sources:

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