To convert stone to pounds, multiply by 14. 10 stone is 140 lb, 11 stone is 154 lb and 12 stone is 168 lb.
Stone is still the everyday unit for body weight in the UK and Ireland, usually given as stone and pounds ("11 st 4"). US scales and apps use pounds, so this conversion comes up whenever weights cross the Atlantic.
How to use the stone to lbs converter
- Type the value in stone into the box. Decimals are fine; for 11 st 4 lb, enter 11.2857 (11 + 4/14).
- The result in pounds updates as you type, along with the working.
- Need the other way? Switch the direction menu, or open the lbs to stone converter.
Formula
One stone is exactly 14 avoirdupois pounds (6.35029318 kg), as set out in the UK Weights and Measures Act 1985.
Worked example
Convert 11 st 4 lb to pounds.
- 11 st × 14 = 154 lb.
- Add the 4 lb: 154 + 4 = 158.
- Result: 158 lb (71.67 kg).
Stone to pounds chart
Common values, rounded to 1 decimal places.
| Stone (st) | Pounds (lb) |
|---|---|
| 1 st | 14 lb |
| 2 st | 28 lb |
| 5 st | 70 lb |
| 7 st | 98 lb |
| 8 st | 112 lb |
| 9 st | 126 lb |
| 9.5 st | 133 lb |
| 10 st | 140 lb |
| 10.5 st | 147 lb |
| 11 st | 154 lb |
| 11.5 st | 161 lb |
| 12 st | 168 lb |
| 13 st | 182 lb |
| 14 st | 196 lb |
| 15 st | 210 lb |
| 16 st | 224 lb |
| 18 st | 252 lb |
| 20 st | 280 lb |
Where stone is used
The NHS, UK slimming clubs and most British bathroom scales show stone and pounds, though medical records are in kg. Boxing and horse racing in Britain have long used stone too; racehorse weights are often quoted like "9 st 7 lb".
Stone is only used for people and animals in practice. Shops sell goods in kilograms by law.
Quick mental math
Multiply by 10, then add 4 times the number. 13 st: 130 + 52 = 182 lb.
Related conversions
Going the other way: lbs to stone converter. Related pages: lbs to kg converter, kg to lbs converter, ounces to grams converter. For other units in the same family, use the full weight converter.
Caveats and assumptions
- Results show up to 10 significant digits; the chart is rounded for reading. Keep full precision for engineering, medical or legal work.
Frequently asked questions
How many pounds are in a stone?
Exactly 14 pounds.
What is 12 stone in pounds?
168 lb, which is 76.2 kg.
How do I convert stone to kg?
Multiply stone by 6.35029318. 11 st = 69.85 kg. The lbs to kg converter page converts the pound figure.
Is "stones" or "stone" correct?
British usage keeps it singular after a number: "he weighs 12 stone."
Sources
- UK Weights and Measures Act 1985, Schedule 1 — defines the stone (14 lb), imperial gallon and imperial fluid ounce
- NIST SP 811 Appendix B.9 — Conversion factors — pound to kilogram
This calculator gives estimates for planning and education. Check measurements, local codes, supplier specs and your school's official policy before relying on a result. See our disclaimer and how we build and check calculators.