How many kilograms are in one stone?
One stone is 6.35 kg.
Stone to Kilograms
Type a value to convert it from stone to kilograms. One st equals 6.35 kg.
Result
Stone and kilograms, side by side
One stone is 6.35 kg. In the other direction, one kilogram is 0.1575 st.
The factor is exact rather than rounded: imperial and US units have been defined from the metric ones since 1959, so the conversion introduces no error of its own. What you see below is arithmetic, not an approximation.
The stone is 14 pounds, about 6.35 kilograms, and is used almost only in the United Kingdom and Ireland, for body weight: someone at 11 st 4 lb weighs 158 pounds. It is not used in the United States.
The kilogram is the base unit of mass in the International System. Since 2019 it has been defined through the Planck constant, replacing the platinum-iridium cylinder kept near Paris that had been the standard since 1889. A liter of water has a mass of about one kilogram.
| Stone | Kilogram |
|---|---|
| 1 | 6.35029 |
| 5 | 31.7515 |
| 10 | 63.5029 |
| 50 | 317.515 |
| 70 | 444.521 |
| 100 | 635.029 |
Frequently asked questions
How do I convert kilograms back to stone?
One kilogram is 0.1575 st. The tool above converts in both directions.
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