How to convert stone to kilograms
To convert stone to kilograms, multiply by 6.35029318. Weight and mass conversions matter for cooking, shipping, fitness tracking, medicine and trade.
Stone to Kilogram conversion table
| Stone (st) | Kilogram (kg) |
|---|---|
| 0.1 st | 0.635029318 kg |
| 0.5 st | 3.17514659 kg |
| 1 st | 6.35029318 kg |
| 2 st | 12.70058636 kg |
| 3 st | 19.05087954 kg |
| 4 st | 25.40117272 kg |
| 5 st | 31.7514659 kg |
| 10 st | 63.5029318 kg |
| 20 st | 127.0058636 kg |
| 25 st | 158.7573295 kg |
| 50 st | 317.514659 kg |
| 100 st | 635.029318 kg |
| 500 st | 3,175.14659 kg |
| 1,000 st | 6,350.29318 kg |
About the units
Stone (st)
A stone equals 14 pounds (6.35029318 kg) and is still used in the UK and Ireland for body weight.
Kilogram (kg)
The kilogram is the SI base unit of mass, defined through the Planck constant since 2019.
How to use this converter
- Type the number of stone (st) in the input box.
- The result in kilograms appears instantly — no button needed.
- See the same value in every other weight unit just below.
- Use “Swap units” to convert kilograms back to stone.
Tips for better results
- Double-check which system a unit belongs to (for example US vs UK gallons).
- Use the swap button to convert in the opposite direction instantly.
- Bookmark the conversions you use most — each pair has its own page.
Frequently asked questions
How many kilograms are in one stone?
One stone equals 6.35029318 kilograms. 6.35029318 is the exact factor used by this converter.
How do I convert stone to kilograms?
Multiply the value in stone by 6.35029318. To go the other way, multiply kilograms by 0.157473044418.
What is 10 st in kg?
10 st = 63.5029318 kg. Also, 5 st = 31.7514659 kg and 100 st = 635.029318 kg.
What is the difference between a stone and a kilogram?
A stone equals 14 pounds (6.35029318 kg) and is still used in the UK and Ireland for body weight. The kilogram is the SI base unit of mass, defined through the Planck constant since 2019.
Is this tool free and private?
Yes — the Stone to Kilogram is completely free with no sign-up, and it runs entirely in your browser, so the values you enter are never uploaded to our servers.
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