Stones to kilograms
Type a value in stones to see it in kilograms straight away, or type in the second box to convert back.
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Processing and privacy: The result is calculated inside your browser and your data is not sent to any server.
How to use it
- Type the value in the stones box.
- Read the result in kilograms as you type, and pick the precision you need.
- Swap the direction to convert back, or copy the result.
How it is calculated
kg = st × 6.35029318
Multiply the value in stones by 6.35029318 to get kilograms.
Example
To convert 25 st to kilograms: 25 × 6.35029318 = 158.757 kg.
Conversion table
| Stones (st) | Kilograms (kg) |
|---|---|
| 1 | 6.35029 |
| 2 | 12.7006 |
| 3 | 19.0509 |
| 5 | 31.7515 |
| 10 | 63.5029 |
| 20 | 127.006 |
| 25 | 158.757 |
| 50 | 317.515 |
| 100 | 635.029 |
| 250 | 1,587.57 |
| 500 | 3,175.15 |
| 1,000 | 6,350.29 |
About the units
- Stone
- A British unit equal to 14 pounds, exactly 6.35029318 kg, still used in the UK and Ireland for body weight.
- Kilogram
- The SI base unit of mass, defined since 2019 by fixing the Planck constant at 6.62607015 × 10^-34 J s.
Limits and caveats
- Results are rounded for display and computed with the browser's floating point precision (about 15 significant digits).
- Both unit factors are exact by their official definitions.
Questions about this tool
How many kilograms are in one stone?
1 st = 6.35029 kg exactly.
How do I convert stones to kilograms?
Use kg = st × 6.35029318. For example, 25 st = 158.757 kg.
How many stones are in one kilogram?
1 kg = 0.157473 st.
Are mass and weight the same thing?
Strictly no: mass is the amount of matter, in kilograms, while weight is the force of gravity on it, in newtons. Scales display mass, so everyday language uses the two words interchangeably.
What is the difference between an ounce and a troy ounce?
An ordinary ounce is 28.349523125 grams and is used for food and goods, while a troy ounce is 31.1034768 grams and is used to price gold and silver.