Pound to Stone Converter (lb to st)
1 pound = 0.0714285 stone. One stone equals exactly 14 pounds.
Result
170 lb = 12.142853 st
How to convert pound to stone
One stone equals exactly 14 pounds. British body weight is written as stones and pounds (for example 11 st 4 lb), so converting means multiplying the stones by 14 and adding the leftover pounds.
Formula
st = lb × 0.0714285
Worked example
170 lb × 0.0714285 = 12.1429 st
Pound to Stone quick-reference table
| Pound (lb) | Stone (st) |
|---|---|
| 100 lb | 7.14285 st |
| 120 lb | 8.57143 st |
| 150 lb | 10.7143 st |
| 170 lb | 12.1429 st |
| 200 lb | 14.2857 st |
| 250 lb | 17.8571 st |
Real-life examples
A person weighing 170 lb is 12.14 st, or 12 stone 2 lb.
Frequently asked questions
How do I convert stones and pounds to pounds?
Multiply the stones by 14 and add the extra pounds: 10 st 6 lb = 140 + 6 = 146 lb.
Is a US stone different from a UK stone?
The stone is a British unit and is always 14 lb. The US does not normally use stones.
What is 1 pound in stone?
1 pound = 0.0714285 stone (lb to st).
What is the formula to convert lb to st?
st = lb × 0.0714285. For example, 170 lb × 0.0714285 = 12.1429 st.
How do I convert st back to lb?
Use the reverse converter: 1 stone = 14 pound. Check: 12.1429 st converts back to 170 lb.
Reverse conversion
Need the other direction? Stone to Pound converter (st to lb): 1 stone = 14 pound.
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