Convert stone and pounds to kilograms instantly with our accurate UK weight calculator.
Rounded to 2 decimal places. Standard UK/IE ratio (1 st = 6.35029 kg).
Popular values, ready when you need them.
Use this chart to translate familiar stone values into kilograms for fitness logs, weight records and conversations with a healthcare professional. A conversion describes mass only; it does not decide whether a weight is healthy without height and wider context.
Use the BMI calculator for a height-based screening result. BMI is a screening measure, not a diagnosis.
A stone is a traditional unit of mass still used for personal body weight in the UK and Ireland. One stone equals 14 pounds, or 6.35029318 kilograms.
Multiply your stone value by 6.35029318. The converter rounds the displayed result to two decimal places.
Weight conversions are useful for records and everyday comparisons, but they do not describe health on their own. For personal concerns, speak with a qualified healthcare professional. Explore the BMI calculator.
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View guideOne stone is exactly 6.35029318 kilograms, usually displayed as 6.35029 kg. This fixed ratio is used throughout the converter.
Multiply the number of stones by 6.35029 to get kilograms. For example, 10 stone is 63.50 kg.
Stone is primarily used for body weight in the UK and Ireland. Kilograms are more common in most other countries.