Pounds to stones
1 pound = 0.0714286 stones
Type a value in pounds (lb) to get stones (st) straight away. A pound is smaller than a stone, so the number goes down. Both units belong to weight, measured here against the kilogram.
1 lb = 0.071428571 st
Formula
st = lb × 0.071428571
One pound is 0.071428571 stones, so multiply by that factor. You can also divide by 14, the number of pounds in one stone. Here lb is the value in pounds and st is the result in stones.
Worked example: 150 pounds × 0.071428571 = 10.7143 stones.
Pounds to stones table
| pounds (lb) | stones (st) |
|---|---|
| 1 lb | 0.0714286 st |
| 2 lb | 0.142857 st |
| 3 lb | 0.214286 st |
| 4 lb | 0.285714 st |
| 5 lb | 0.357143 st |
| 6 lb | 0.428571 st |
| 7 lb | 0.5 st |
| 8 lb | 0.571429 st |
| 9 lb | 0.642857 st |
| 10 lb | 0.714286 st |
| 15 lb | 1.07143 st |
| 20 lb | 1.42857 st |
| 25 lb | 1.78571 st |
| 30 lb | 2.14286 st |
| 40 lb | 2.85714 st |
| 50 lb | 3.57143 st |
| 60 lb | 4.28571 st |
| 75 lb | 5.35714 st |
| 100 lb | 7.14286 st |
Everyday pounds in stones
| What it is | lb | st |
|---|---|---|
| a block of butter (US) | 1 lb | 0.0714286 st |
| a newborn baby (about) | 8 lb | 0.571429 st |
| a common checked-bag limit | 50 lb | 3.57143 st |
| an adult body weight | 150 lb | 10.7143 st |
| a heavy adult | 200 lb | 14.2857 st |
Quick estimate in your head
Multiply by about 0.071. For 150 lb that gives 10.65 st against an exact 10.7143 st, an error of 0.6%.
Watch out for
- Body weight in stones is often written as stones and pounds, e.g. 11 st 4 lb, not as a decimal.
About the units
Pound (lb). The avoirdupois pound, exactly 0.45359237 kg. Used for body weight in the US.
Stone (st). 14 pounds, about 6.35 kg. Still used for body weight in the UK and Ireland.
Going the other way, 1 stone is 14 pounds.
Questions
How many stones are in 1 pound?
1 pound is 0.0714286 stones, and 1 stone is 14 pounds.
How do I convert pounds to stones?
Use st = lb × 0.071428571. For example, 150 pounds × 0.071428571 = 10.7143 stones.
Is the pound to stone factor exact?
Yes, the definitions are exact, so the factor is exact. Results here are rounded to 6 significant digits for display.
How much is a heavy adult in stones?
200 lb is 14.2857 st.
Source for the conversion factor: NIST SP 811, Appendix B (conversion factors).
Related conversions
- stones to pounds
- pounds to kilograms
- pounds to ounces
- stones to kilograms
- kilograms to stones
- pounds to tonnes