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Stone to pounds converter

Convert between stones, pounds and kilograms instantly. One stone is exactly 14 pounds, or about 6.35 kg.

st
lb

Enter a weight to convert it instantly. One stone is exactly 14 pounds, or about 6.35 kilograms.

Stones to pounds and kilograms chart

The conversion is exact: multiply stones by 14 for pounds. For kilograms, one stone equals 6.35 kg to two decimal places. The chart below covers the most common body-weight range.

StonesPoundsKilograms
6 st84 lb38.1 kg
7 st98 lb44.5 kg
8 st112 lb50.8 kg
9 st126 lb57.2 kg
10 st140 lb63.5 kg
11 st154 lb69.9 kg
12 st168 lb76.2 kg
13 st182 lb82.6 kg
14 st196 lb88.9 kg
15 st210 lb95.3 kg
16 st224 lb101.6 kg
17 st238 lb108 kg
18 st252 lb114.3 kg
19 st266 lb120.7 kg
20 st280 lb127 kg

Why the units trip everyone up

British scales read in stones and pounds, gym equipment is labelled in kilograms, and most tracking apps default to one or the other. The awkward part is that stones do not convert to pounds decimally: 11.5 stone is not 11 st 5 lb but 11 st 7 lb, because a stone has 14 pounds, not 10. When a scale shows a decimal, multiply the fraction by 14 to get the pounds.

Common questions

How many pounds are in a stone?
There are exactly 14 pounds in a stone. So 10 stone is 140 lb, 11 stone is 154 lb, and 12 stone is 168 lb. To convert stones to pounds, multiply by 14; to go the other way, divide by 14.
How many kilograms is a stone?
One stone is about 6.35 kg. To convert stones to kilograms, multiply by 6.35. For example, 11 stone is roughly 69.9 kg and 14 stone is roughly 88.9 kg.
Why does the UK weigh people in stones?
The stone is an old British unit that survived metrication for body weight specifically. Scales, doctors and everyday conversation in the UK still commonly use stones and pounds, while most fitness apps and gyms work in kilograms, which is why converting between the two comes up so often.
How do I read 11 st 4 lb in pounds or kilograms?
Multiply the stones by 14 and add the pounds: 11 x 14 + 4 = 158 lb. For kilograms, multiply 158 by 0.4536, which gives about 71.7 kg.

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