Stone (st) to Kilograms (kg) Converter
Enter a value to instantly convert between weight units.
1 Stone = 6.3503 Kilogram
Key Formulas
Kilogram → Pound
lb = kg × 2.20462Pound → Kilogram
kg = lb × 0.453592Gram → Ounce
oz = g × 0.035274Ounce → Gram
g = oz × 28.3495Formula
kg = st × 6.35029The stone has been used in Britain for centuries as a unit for weighing body weight and heavy goods. One stone equals 14 pounds, and since 1 pound is 0.45359237 kg, one stone is exactly 6.35029318 kg. UK medical records, Weight Watchers programs, and everyday conversation still use stone as the primary body weight unit, making this conversion vital for anyone dealing with UK health or fitness contexts.
Source: NIST SP 811, Table B.8
Frequently Asked Questions
Real-World Examples
A UK person saying 'I weigh 12 stone' is 76.2 kg — useful for medical forms that request metric weight.
12 st = 76.2 kg
A weight chart showing 15 stone as a goal translates to 95.25 kg on a digital scale.
15 st = 95.25 kg
A person who weighs 10 stone wants to know their weight in kg for a travel insurance form — 63.5 kg.
10 st = 63.5 kg
A hospital in Ireland records a patient's weight as 18 stone — 114.3 kg for the international medical database.
18 st = 114.31 kg