How to Convert Stone to Kilograms

The stone is a traditional unit of weight used primarily in the United Kingdom and Ireland for expressing body weight. While much of the world uses kilograms and the United States uses pounds, British and Irish people commonly describe their weight in stone and pounds. Converting stone to kilograms is therefore essential for medical professionals, fitness apps, and anyone communicating weight internationally.

One stone equals exactly 6.35029 kilograms, or equivalently, 14 pounds. To convert stone to kilograms, multiply the number of stone by 6.35029. For example, a person weighing 11 stone is approximately 69.85 kg or about 154 lbs. If the weight is given as stone and pounds (like 11 stone 7 lbs), first convert everything to stone (11.5 stone) or add the pound portion separately.

This conversion is particularly important in healthcare settings in the UK, where patient records may need weights in kilograms for medication dosing while patients report their weight in stone. Fitness trackers and weight loss programs serving UK audiences must also handle this conversion. International sporting events require weights in kilograms, so British athletes often need to convert their familiar stone-based weight.

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