The stone
One stone is 14 pounds, or 6.35 kg. It is still the standard for body weight in the UK and Ireland, and appears in older British cookbooks for produce.
Body weight conversions
- 10 st = 140 lb = 63.5 kg
- 11 st 4 lb = 158 lb = 71.7 kg
- 12 st = 168 lb = 76.2 kg
- BMI charts use kg — convert before calculating
Reading a UK scale
Scales there often show stones and pounds separately: 11 st 7 lb means 11 stone plus 7 pounds, not 11.7 stone. Add them as 11 × 14 + 7 = 161 lb.
Recipe relevance
Rare outside body weight — British recipes moved to metric decades ago. If you see stones in a recipe, it is almost certainly an old preserving or produce reference.
Frequently Asked Questions
How many pounds in a stone?
14 lb exactly, or 6.35 kg.
How do I read 11 st 4 lb?
11 × 14 + 4 = 158 lb, about 71.7 kg.
Is 11.7 stone the same as 11 st 7 lb?
No — that is a common misreading. 11 st 7 lb = 11.5 stone.
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