Mass and Weight · Unit Converter

Convert Stone (UK) to Stone (US)

Convert stones (uk) to stones (us) instantly. 1 stone (uk) = 1.12 stone (us) — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Stone (US) 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.

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.

Stone (UK) to Stone (US) conversion formula

The relationship between stones (uk) and stones (us):

1 st = 1.12 st
1 st = 0.8928571429 st

To convert stones (uk) to stones (us), multiply the value in stones (uk) by 1.12. To reverse, multiply stones (us) by 0.8928571429.

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 Stone (UK) converter for the reverse direction.

Step-by-step: convert stones (uk) to stones (us)

  1. Write down the value in stones (uk) (st).
  2. Multiply that value by the factor 1.12.
  3. The product is the equivalent value in stones (us) (st).
  4. To reverse, multiply the stone (us) value by 0.8928571429.

Worked examples

Example 1 — Convert 1 st to st:
1 × 1.12 = 1.12 st

Example 2 — Convert 100 st to st:
100 × 1.12 = 112 st

Real-world example — Adult height conversion

A 1.8-stone (uk)-tall person measures a value in stones (us) 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 × 1.12 = 2.016 st

Real-world example — Fabric purchase length

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

2 st × 1.12 = 2.24 st

Real-world example — Maritime depth conversion

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

10 st × 1.12 = 11.2 st

Stone (UK) to Stone (US) conversion table

Standard reference values for converting stones (uk) to stones (us):

Stone (UK) [st]Stone (US) [st]
0.010.0112
0.10.112
11.12
22.24
33.36
44.48
55.6
1011.2
2022.4
3033.6
4044.8
5056
100112
500560
10001120

Frequently asked questions

How many stones (us) is 1 stone (uk)?
1 stone (uk) equals 1.12 stone (us).
How do I convert stones (uk) to stones (us)?
Multiply the value in stones (uk) by 1.12 to get stones (us).
How do I convert stones (us) back to stones (uk)?
Multiply the value in stones (us) by 0.8928571429, or use the Stone (US) to Stone (UK) converter.
How many stones (us) is 100 stones (uk)?
100 stones (uk) equals 112 stones (us), because 100 × 1.12 = 112.

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 = 1.12 st) verified against the following authoritative sources:

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