Mass and Weight · Unit Converter

Convert Stone (US) to Stone (UK)

Convert stones (us) to stones (uk) instantly. 1 stone (us) = 0.8928571429 stone (uk) — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Stone (UK) 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.

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.

Stone (US) to Stone (UK) conversion formula

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

1 st = 0.8928571429 st
1 st = 1.12 st

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

How to use this converter

Type a value into the calculator. The result in stones (uk) 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 (UK) to Stone (US) converter for the reverse direction.

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

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

Worked examples

Example 1 — Convert 1 st to st:
1 × 0.8928571429 = 0.8928571429 st

Example 2 — Convert 100 st to st:
100 × 0.8928571429 = 89.2857142857 st

Real-world example — Adult height conversion

A 1.8-stone (us)-tall person measures a value in stones (uk) 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 × 0.8928571429 = 1.6071428571 st

Real-world example — Fabric purchase length

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

2 st × 0.8928571429 = 1.7857142857 st

Real-world example — Maritime depth conversion

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

10 st × 0.8928571429 = 8.9285714286 st

Stone (US) to Stone (UK) conversion table

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

Stone (US) [st]Stone (UK) [st]
0.010.0089285714
0.10.0892857143
10.8928571429
21.7857142857
32.6785714286
43.5714285714
54.4642857143
108.9285714286
2017.8571428571
3026.7857142857
4035.7142857143
5044.6428571429
10089.2857142857
500446.4285714286
1000892.8571428571

Frequently asked questions

How many stones (uk) is 1 stone (us)?
1 stone (us) equals 0.8928571429 stone (uk).
How do I convert stones (us) to stones (uk)?
Multiply the value in stones (us) by 0.8928571429 to get stones (uk).
How do I convert stones (uk) back to stones (us)?
Multiply the value in stones (uk) by 1.12, or use the Stone (UK) to Stone (US) converter.
How many stones (uk) is 100 stones (us)?
100 stones (us) equals 89.2857142857 stones (uk), because 100 × 0.8928571429 = 89.2857142857.

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 = 0.8928571429 st) verified against the following authoritative sources:

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