Pounds to Stone
Convert pound to stone instantly — type a value and read the result, with the exact formula shown.
Reviewed by the CalcCafe editorial team · Last updated 1 July 2026 · How we test our tools
Example
1 lb = 0.07142857 st, 5 lb = 0.3571429 st, 10 lb = 0.7142857 st.
Common conversions: pound to stone
Quick reference for the lb → st values you are most likely to need, computed with the exact factor the converter above uses. It includes the specific values people most often look up (10 lb, 150 lb, 180 lb, 140 lb, 14 lb). See also the reverse converter: Stone to Pound.
| Pound (lb) | Stone (st) |
|---|
| 1 lb | 0.071429 st |
| 2 lb | 0.142857 st |
| 3 lb | 0.214286 st |
| 5 lb | 0.357143 st |
| 10 lb | 0.714286 st |
| 11 lb | 0.785714 st |
| 14 lb | 1 st |
| 15 lb | 1.0714 st |
| 20 lb | 1.4286 st |
| 25 lb | 1.7857 st |
| 30 lb | 2.1429 st |
| 40 lb | 2.8571 st |
| 50 lb | 3.5714 st |
| 55 lb | 3.9286 st |
| 60 lb | 4.2857 st |
| 70 lb | 5 st |
| 75 lb | 5.3571 st |
| 80 lb | 5.7143 st |
| 90 lb | 6.4286 st |
| 100 lb | 7.1429 st |
| 140 lb | 10 st |
| 150 lb | 10.7143 st |
| 180 lb | 12.8571 st |
| 200 lb | 14.2857 st |
| 250 lb | 17.8571 st |
| 500 lb | 35.7143 st |
| 1,000 lb | 71.4286 st |
Stone to Pound
| Stone (st) | Pound (lb) |
|---|
| 1 st | 14 lb |
| 5 st | 70 lb |
| 10 st | 140 lb |
| 50 st | 700 lb |
| 100 st | 1,400 lb |
How it works
Stone = Pound × 0.07142857. Every value is converted through a single kilogram base unit using internationally defined conversion factors, so any from/to pair stays consistent.
Good to know
Converting pounds to stone is something people in the UK and Ireland do constantly, because body weight there is almost always quoted in stone and pounds rather than in a single number. If your bathroom scale, a fitness app, or an American medical record gives a figure in pounds, you will often want to translate it into the "X stone Y pounds" format that doctors, gyms, and friends actually use in everyday conversation.
Both units are part of the British imperial system, so this is not a metric-to-imperial swap. The pound (lb) traces back to the Roman libra, which is why its abbreviation is "lb," while the stone has farming and market roots, historically used to weigh produce, livestock, and wool. The two were locked together by definition: one stone equals exactly 14 pounds, a fixed whole-number relationship with no rounding involved.
Because of that, the mental shortcut is simple: divide the pound figure by 14. For quick estimates, remember that 14 lb is 1 stone, 28 lb is 2 stone, and 70 lb is exactly 5 stone. To get the leftover pounds, take the whole stones, multiply back by 14, and subtract from your original number.
The most common mistake is treating the decimal result as if the fractional part were pounds. 200 lb is about 14.29 stone, but that "0.29" is not 29 pounds and not 2.9 pounds either — it is 0.29 of a stone, which works out to roughly 4 pounds. To express weight properly you should report it as 14 stone 4 lb, so always convert the decimal remainder back into pounds rather than reading it off directly.
Frequently asked questions
How do you convert pound to stone?
Multiply the number of pounds by 0.07142857 to get stones. For example, 1 lb = 0.07142857 st.
What is 1 pound in stones?
1 pound equals 0.07142857 stones (1 lb = 0.07142857 st).
How many pounds are in 1 stone?
There are 14 pounds in 1 stone.
Is this converter free and private?
Yes. It runs entirely in your browser, so your inputs never leave your device, there is no sign-up, and it works offline once loaded.
Are the conversions exact?
Conversions use internationally defined factors and are exact where the definitions are exact (for example, 1 inch = 2.54 cm). Displayed results are rounded for readability.
People also ask
How many stone is 150 lbs?
150 pounds is about 10.71 stone, which is 10 stone 10 pounds (10 × 14 = 140, leaving 10 lb over).
What is 200 lbs in stone and pounds?
200 pounds equals roughly 14.29 stone, or 14 stone 4 pounds (14 × 14 = 196, with 4 lb remaining).
How do I convert pounds to stone in my head?
Divide the number of pounds by 14. For example, 168 ÷ 14 = 12 stone exactly, and any remainder is the leftover pounds.
Why is 14 pounds equal to one stone?
The stone was standardized in British law as exactly 14 avoirdupois pounds, a fixed legal definition, so the relationship is exact rather than approximate.
Is stone used in the United States?
No. The stone is essentially never used for body weight in the US, where people quote weight in pounds alone; it is mainly used in the UK and Ireland.
What is 100 lbs in stone?
100 pounds is about 7.14 stone, which is 7 stone 2 pounds (7 × 14 = 98, leaving 2 lb).
How many pounds are in 12 stone?
12 stone is 168 pounds, since you multiply 12 by 14.
What does 0.07142857 mean in this conversion?
It is 1 divided by 14, the factor you multiply pounds by to get stone; multiplying by it is the same as dividing the pound value by 14.
Related calculators
Sources & references
These tools follow our methodology and provide educational estimates only — verify important figures with a qualified professional.