The stone (st) is a unit of body weight still widely used in the UK and Ireland, while most of the world uses kilograms (kg). This converter switches between them in both directions — type into either field and the other updates live.
How it works
The conversion is a single multiplication by an exact factor:
kg = st × 6.35029318 and st = kg ÷ 6.35029318
That factor is not arbitrary: one stone equals 14 pounds, and one pound is exactly 0.45359237 kg, so 14 × 0.45359237 = 6.35029318 kg per stone.
Example
Convert a body weight of 11 stone:
11 × 6.35029318 ≈ 69.85 kg
Going the other way, 80 kg is 80 ÷ 6.35029318 ≈ 12.6 st (about 12 st 8 lb).
| Stone (st) | Kilograms (kg) |
|---|---|
| 1 st | 6.3503 kg |
| 5 st | 31.7515 kg |
| 10 st | 63.5029 kg |
| 100 st | 635.0293 kg |
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