Stone to KG Converter
Multiply a weight in stone by 6.35029318 to get kilograms. 10 st = 63.5029318 kg, so ten stone is about 63.5 kg.
Stone is written st. A weight such as 12 st 7 lb means 12 stone and 7 pounds, which is 12.5 stone, and 12.5 st = 79.37866475 kg.
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(opens in a new tab)How to convert stone to kilograms
Formula: kilograms = stone × 6.35029318
The constant is exact by definition: 1 stone = 6.35029318 kilograms. It is not a rounded approximation.
Because a stone is exactly 14 pounds and the pound is exactly 0.45359237 kg, the factor 6.35029318 is exact. A whole number of stone always converts to a result with at most eight decimal places, so the table values are complete.
Worked example: 12 st to kilograms
This result is complete, not rounded.
Convert 12 st
Input
12 st
Output
12 × 6.35029318 = 76.20351816 kg
Common stone to kilograms conversions
| Stone (st) | Kilograms (kg) |
|---|---|
| 1 st | 6.35029318 kg |
| 5 st | 31.7514659 kg |
| 8 st | 50.80234544 kg |
| 10 st | 63.5029318 kg |
| 11 st | 69.85322498 kg |
| 12 st | 76.20351816 kg |
| 14 st | 88.90410452 kg |
| 16 st | 101.60469088 kg |
| 20 st | 127.0058636 kg |
When you need to convert stone to kilograms
- Body weight given in stone, for a form, app or scale that uses kilograms.
- UK and Irish sources that quote weights in stone and pounds.
- Boxing and horse-racing weights in stone, compared with metric weights.
- Comparing weights between a UK source and a metric one.
Things worth knowing
- Convert stone and pounds together by first turning the pounds into a fraction of a stone: divide them by 14 and add the result to the stone. 7 lb is 0.5 st.
- This page converts the number only and does not interpret a body weight.
Converting back and related converters
To go the other way, use the KG to Stone Converter, which applies stone = kilograms / 6.35029318. For any other pair of units, open the Unit Converter, or browse every unit converter.
- LBS to KG Converter: to convert a weight given in pounds only.
- KG to LBS Converter: to give a metric weight in pounds.
Frequently asked questions
How many kg is 1 stone?
1 st = 6.35029318 kg, exactly. That is 14 pounds of 0.45359237 kg each.
What does st mean in a weight?
st is the symbol for stone, a unit of 14 pounds. In 11 st 2 lb, the st is stone and the lb is pounds.
How many kg is 12 stone?
12 st = 76.20351816 kg. Because the factor is exact, this result is complete rather than rounded.
How do I convert 12 st 7 lb to kg?
Divide the 7 pounds by 14 to get 0.5 stone, add it to make 12.5 stone, then multiply by 6.35029318: 12.5 st = 79.37866475 kg.