Convert Pound to Stone
1 pound = 0.07142857 stone (st). For example, 10 pound = 0.7142857 stone and 100 pound = 7.142857 stone. Type any value below to convert pound to stone both ways — it runs entirely in your browser.
Quick answer: Pound to Stone
1 Pound = 0.07142857 Stone (lb → st). To convert pound to stone, multiply by 0.07142857. To convert stone to pound, multiply by 14. The converter at the top does this instantly and both ways; the sections below give the formula, worked examples, a full conversion chart and answers to the most common pound-to-stone questions.
How to convert Pound to Stone
To convert pound to stone, multiply the number of pound by the conversion factor 0.07142857, because 1 lb = 0.07142857 st. The conversion is linear, so the same factor works for any value — whole numbers, decimals or fractions. For the reverse direction, 1 st = 14 lb, so you divide by 0.07142857 (or multiply by 14) to turn stone back into pound.
st = lb × 0.07142857 ·
lb = st × 14
- Write down the value you want to convert, in pound.
- Multiply it by 0.07142857.
- The result is the same area/length/quantity expressed in stone.
Pound to Stone — worked examples
Each row shows the exact arithmetic so you can follow the conversion step by step. For example, 5 pound is 0.3571429 stone because 5 lb × 0.07142857 = 0.3571429 st.
| Pound | Calculation | Stone |
|---|---|---|
| 1 lb | 1 lb × 0.07142857 = 0.07142857 st | 0.07142857 st |
| 2 lb | 2 lb × 0.07142857 = 0.1428571 st | 0.1428571 st |
| 3 lb | 3 lb × 0.07142857 = 0.2142857 st | 0.2142857 st |
| 5 lb | 5 lb × 0.07142857 = 0.3571429 st | 0.3571429 st |
| 7 lb | 7 lb × 0.07142857 = 0.5 st | 0.5 st |
| 10 lb | 10 lb × 0.07142857 = 0.7142857 st | 0.7142857 st |
| 12 lb | 12 lb × 0.07142857 = 0.8571429 st | 0.8571429 st |
| 15 lb | 15 lb × 0.07142857 = 1.071429 st | 1.071429 st |
| 20 lb | 20 lb × 0.07142857 = 1.428571 st | 1.428571 st |
| 25 lb | 25 lb × 0.07142857 = 1.785714 st | 1.785714 st |
| 50 lb | 50 lb × 0.07142857 = 3.571429 st | 3.571429 st |
| 100 lb | 100 lb × 0.07142857 = 7.142857 st | 7.142857 st |
Common Pound to Stone conversions
These are the pound-to-stone values people look up most often. Every figure is computed from the exact factor, so you can rely on them for quick reference:
- 1 pound = 0.07142857 stone
- 2 pound = 0.1428571 stone
- 2.5 pound = 0.1785714 stone
- 3 pound = 0.2142857 stone
- 4 pound = 0.2857143 stone
- 5 pound = 0.3571429 stone
- 6 pound = 0.4285714 stone
- 7 pound = 0.5 stone
- 8 pound = 0.5714286 stone
- 9 pound = 0.6428571 stone
- 10 pound = 0.7142857 stone
- 12 pound = 0.8571429 stone
- 15 pound = 1.071429 stone
- 20 pound = 1.428571 stone
- 25 pound = 1.785714 stone
- 30 pound = 2.142857 stone
- 50 pound = 3.571429 stone
- 75 pound = 5.357143 stone
- 100 pound = 7.142857 stone
- 200 pound = 14.28571 stone
- 500 pound = 35.71429 stone
- 1000 pound = 71.42857 stone
Pound to Stone conversion chart (both directions)
The chart below converts pound to stone and stone to pound side by side, so it works whichever way you need. 1 pound = 0.07142857 stone, and 1 stone = 14 pound.
| Pound → Stone | Stone → Pound |
|---|---|
| 0.25 lb = 0.01785714 st | 0.25 st = 3.5 lb |
| 0.5 lb = 0.03571429 st | 0.5 st = 7 lb |
| 1 lb = 0.07142857 st | 1 st = 14 lb |
| 2 lb = 0.1428571 st | 2 st = 28 lb |
| 3 lb = 0.2142857 st | 3 st = 42 lb |
| 4 lb = 0.2857143 st | 4 st = 56 lb |
| 5 lb = 0.3571429 st | 5 st = 70 lb |
| 6 lb = 0.4285714 st | 6 st = 84 lb |
| 7 lb = 0.5 st | 7 st = 98 lb |
| 8 lb = 0.5714286 st | 8 st = 112 lb |
| 9 lb = 0.6428571 st | 9 st = 126 lb |
| 10 lb = 0.7142857 st | 10 st = 140 lb |
| 12 lb = 0.8571429 st | 12 st = 168 lb |
| 15 lb = 1.071429 st | 15 st = 210 lb |
| 20 lb = 1.428571 st | 20 st = 280 lb |
| 25 lb = 1.785714 st | 25 st = 350 lb |
| 30 lb = 2.142857 st | 30 st = 420 lb |
| 40 lb = 2.857143 st | 40 st = 560 lb |
| 50 lb = 3.571429 st | 50 st = 700 lb |
| 75 lb = 5.357143 st | 75 st = 1,050 lb |
| 100 lb = 7.142857 st | 100 st = 1,400 lb |
| 150 lb = 10.71429 st | 150 st = 2,100 lb |
| 200 lb = 14.28571 st | 200 st = 2,800 lb |
| 250 lb = 17.85714 st | 250 st = 3,500 lb |
| 500 lb = 35.71429 st | 500 st = 7,000 lb |
| 1000 lb = 71.42857 st | 1000 st = 14,000 lb |
Pound vs Stone: which is bigger?
A stone is the larger unit: one stone equals 14 pounds. Put another way, you need 14 pounds to make a single stone.
What is a Pound? History, origin and usage
The pound descends from the Roman libra pondo — "a pound by weight". English kept "pound" from pondo and the abbreviation "lb" from libra, which is why the word and its symbol look unrelated. For centuries the pound differed between countries and even between trades. That ended on 1 July 1959, when the United States, United Kingdom, Canada, Australia, New Zealand and South Africa agreed a single international pound of exactly 0.453 592 37 kilograms.
The pound is the everyday weight unit in the United States and is still widely used in the United Kingdom for body weight, food and parcels. Body weight, groceries, baggage limits and shipping rates in the US are all quoted in pounds.
Because the 1959 agreement fixed the pound as an exact number of kilograms, every pound conversion on this site is exact rather than approximate. The same agreement fixed the yard at exactly 0.9144 metres — which is why it is known as the yard-and-pound agreement.
What is a Stone? History, origin and usage
The stone was exactly what it sounds like: a stone kept at a market and used as a counterweight. Its value depended on what was being traded — wool, meat, cheese and glass all had different stones, ranging from about five pounds to forty. The Weights and Measures Act of 1835 ended the confusion by fixing the stone at fourteen pounds for all purposes.
The stone survives almost entirely for one job: giving a person's body weight in Britain and Ireland, where weights are read as "eleven stone four" rather than in pounds or kilograms. Doctors, gyms and bathroom scales in those countries still routinely show it.
Fourteen is an unusual number to divide by, and it is a leftover from the wool trade, where eight stone made one hundredweight of 112 pounds. The stone is barely used in the United States, where the same body weight would simply be given in pounds.
Convert 1 Pound to other units
It can help to see a pound next to the other units it is commonly compared with. One pound (lb) is equal to:
| 1 Pound equals | Unit |
|---|---|
| 0.4535924 kg | Kilogram |
| 453.5924 g | Gram |
| 453,592.4 mg | Milligram |
| 453,592,400 µg | Microgram |
| 0.0004535924 t | Tonne |
| 0.004535924 q | Quintal |
| 16 oz | Ounce |
| 0.07142857 st | Stone |
| 0.0005 ton (US) | Short ton |
| 0.0004464286 ton (UK) | Long ton |
| 14.58333 oz t | Troy ounce |
| 7,000 gr | Grain |
| 2,267.962 ct | Carat |
Convert 1 Stone to other units
One stone (st) is equal to:
| 1 Stone equals | Unit |
|---|---|
| 6.350293 kg | Kilogram |
| 6,350.293 g | Gram |
| 6,350,293 mg | Milligram |
| 6,350,293,000 µg | Microgram |
| 0.006350293 t | Tonne |
| 0.06350293 q | Quintal |
| 14 lb | Pound |
| 224 oz | Ounce |
| 0.007 ton (US) | Short ton |
| 0.00625 ton (UK) | Long ton |
| 204.1667 oz t | Troy ounce |
| 98,000 gr | Grain |
| 31,751.47 ct | Carat |
Tips for converting Pound to Stone
- To go from pound to stone, multiply by 0.07142857; to go back, divide by 0.07142857 (or multiply by 14).
- For a quick mental estimate, remember that 1 pound ≈ 0.07142857 stone, so 10 pound ≈ 0.7142857 stone.
- The converter above keeps full precision; the tables round for readability, so use the tool for exact figures.
- Both fields update live as you type — change either side to convert in that direction.
How to use this Pound to Stone converter
Type a number into the Pound field and the equivalent in Stone appears instantly — there is no “convert” button to press and nothing is sent to a server, so it works offline once the page has loaded and is safe for any data. You can also type into the Stone field to convert the other way (stone to pound). Use the swap control to flip the two units, and copy the result with a single click. Because the calculation runs in your browser with full floating-point precision, the converter is more exact than the rounded figures shown in the reference chart above — use the chart for quick look-ups and the tool for precise work.
Accuracy and method
Every figure on this page — the formula, the worked examples, the conversion chart and the “convert to other units” tables — is computed from a single verified conversion factor (1 lb = 0.07142857 st), never copied from a hand-typed lookup table that could drift. That factor is derived from each unit’s definition in terms of a common base unit, and an automated check re-verifies all of the site’s factors on every update, so the numbers here stay correct over time. This matters for pound-to-stone conversions because a small rounding error in a published table compounds quickly at larger quantities; computing from the exact factor avoids that.
Sources
- NIST Special Publication 811 — Guide for the Use of the SI — publishes the exact metric equivalents of the customary weight units. The 1959 international yard-and-pound agreement fixes the international avoirdupois pound at exactly 0.453 592 37 kilogram, and the ounce, stone, grain and both tons are defined as exact fractions or multiples of that pound — so every imperial weight on this page is exact, not rounded.
- BIPM — The International System of Units (SI Brochure) — the defining document for the SI, published by the International Bureau of Weights and Measures. It fixes the base unit that this conversion resolves to, which is why the factor here can be exact rather than approximate.
Weight factors here are exact, anchored to the kilogram: the international pound is exactly 0.45359237 kg, a stone is 14 pounds, a short ton is 2,000 pounds and a long ton is 2,240, a grain is 1/7000 of a pound and a metric carat is exactly 200 mg. So the live tool and every number on this page always agree.
Frequently asked questions
- How many stone are in 1 pound?
- 1 pound = 0.07142857 stone (st). To convert any number of pound to stone, multiply by 0.07142857.
- How do I convert pound to stone?
- Multiply the number of pound by 0.07142857. For example, 10 pound = 10 × 0.07142857 = 0.7142857 stone, and 25 pound = 1.785714 stone.
- How many pound are in 1 stone?
- 1 stone = 14 pound. So to convert stone back to pound, multiply by 14.
- What is the formula to convert pound to stone?
- stone = pound × 0.07142857. The reverse formula is pound = stone × 14.
- How much is 100 pound in stone?
- 100 pound = 7.142857 stone. (And 1000 pound = 71.42857 stone.)
- Which is bigger, a pound or a stone?
- A stone is larger: 1 stone = 14 pound.
- Is this pound to stone converter accurate?
- Yes — every value is computed from the exact 0.07142857 st per lb factor (not rounded look-up tables), and the factors are re-verified automatically on every update.
- Can I convert stone to pound too?
- Yes. The converter works both ways — enter a value in either field. 1 stone = 14 pound.