Mass and Weight · Unit Converter

Convert Pound to Stone (US)

Convert pounds to stones (us) instantly. 1 pound = 0.08 stone (us) — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Stone (US) to Pound 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

Pound

What is a pound?

The pound (lb) is a unit of mass equal to exactly 0.45359237 kilogram.

Origin of the pound

From Latin 'libra pondo' (a pound by weight); the symbol lb comes from 'libra'.

Where it is used

The primary weight unit in the United States and informally in the UK.

When and where it was developed

The international avoirdupois pound was fixed in the 1959 yard-and-pound agreement.

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.

Pound to Stone (US) conversion formula

The relationship between pounds and stones (us):

1 lb = 0.08 st
1 st = 12.5 lb

To convert pounds to stones (us), multiply the value in pounds by 0.08. To reverse, multiply stones (us) by 12.5.

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 Pound converter for the reverse direction.

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

  1. Write down the value in pounds (lb).
  2. Multiply that value by the factor 0.08.
  3. The product is the equivalent value in stones (us) (st).
  4. To reverse, multiply the stone (us) value by 12.5.

Worked examples

Example 1 — Convert 1 lb to st:
1 × 0.08 = 0.08 st

Example 2 — Convert 100 lb to st:
100 × 0.08 = 8 st

Real-world example — Fabric purchase length

Two pounds 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 lb × 0.08 = 0.16 st

Real-world example — Maritime depth conversion

A 10-pound 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 lb × 0.08 = 0.8 st

Real-world example — Reference scenario in case of fallback

Conversion between human-scale length units is the everyday workflow of architecture, athletics, and apparel design — three of the most common contexts that span metric and imperial systems.

1 lb × 0.08 = 0.08 st

Pound to Stone (US) conversion table

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

Pound [lb]Stone (US) [st]
0.010.0008
0.10.008
10.08
20.16
30.24
40.32
50.4
100.8
201.6
302.4
403.2
504
1008
50040
100080

Frequently asked questions

How many stones (us) is 1 pound?
1 pound equals 0.08 stone (us).
How do I convert pounds to stones (us)?
Multiply the value in pounds by 0.08 to get stones (us).
How do I convert stones (us) back to pounds?
Multiply the value in stones (us) by 12.5, or use the Stone (US) to Pound converter.
How many stones (us) is 100 pounds?
100 pounds equals 8 stones (us), because 100 × 0.08 = 8.

Convert Pound to other weight units

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

Sources & references

Conversion factor (1 lb = 0.08 st) verified against the following authoritative sources:

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