How to convert stones to kilograms
Enter a weight in stones and get kilograms. Decimals are fine, so 11.5 means eleven and a half stone.
A stone is exactly 14 pounds, which makes it 6.35029318 kg. The result is exact to the rounding you choose.
1 stone = 6.35029318 kilograms
Formula: kilograms = stones × 6.35029318
- Multiply the number of stones by 6.35029318.
- If your weight is given as stones and pounds, first change the pounds into a fraction of a stone by dividing by 14, then add that to the stones.
Common conversions
| Stones (st) | Kilograms (kg) |
|---|---|
| 1 st | 6.35029 kg |
| 5 st | 31.7515 kg |
| 8 st | 50.8023 kg |
| 10 st | 63.5029 kg |
| 12 st | 76.2035 kg |
| 14 st | 88.9041 kg |
| 16 st | 101.605 kg |
| 18 st | 114.305 kg |
| 20 st | 127.006 kg |
Values are computed by the same converter as above, rounded to six significant digits. Need the other direction? See Kilograms to Stones.
Worked examples
A typical adult weight
12 st = 76.2035 kg.
Stones and pounds
11 st 7 lb is 11 + 7 ÷ 14 = 11.5 stone, so 11.5 st = 73.0284 kg.
A lighter weight
8 st = 50.8023 kg.
Things to keep in mind
- The stone is used for body weight in the UK and Ireland. Medical forms and most other countries use kilograms.
- Results are rounded to six significant digits by default. Choose more decimal places if you need them.
- A negative weight has no meaning, so the converter rejects it.