Convert stone (st) to kilograms (kg) instantly. Our calculator uses the exact conversion factor: 1 stone = 6.35029318 kilograms.
To convert stone (st) to kilograms (kg), multiply the weight in stone by 6.35029318. This is the exact conversion factor for precise measurements.
Kilograms = Stone × 6.35029318
Here are some common body weight examples in both stone and kilograms:
Average female weight (UK)
8 st = 50.8 kg
Average male weight (UK)
12 st = 76.2 kg
Professional rugby player
15 st = 95.25 kg
Heavyweight boxer
20 st = 127.01 kg
The stone (st) is a unit of weight in the imperial system, primarily used in the United Kingdom and Ireland. One stone equals exactly 14 pounds or 6.35029318 kilograms. Common uses include:
The kilogram (kg) is the international standard unit of mass in the metric system. Since 2019, it's defined using the Planck constant, making it a precise and universal measurement standard used for:
The stone has been used as a weight measurement since medieval times, though its exact value varied by location and commodity. The modern stone was standardized at 14 pounds in the 19th century. Today, it remains in common use in the UK and Ireland, particularly for expressing human body weight.
| Stone (st) | Kilograms (kg) |
|---|---|
| 1 st | 6.35 kg |
| 2 st | 12.7 kg |
| 3 st | 19.05 kg |
| 4 st | 25.4 kg |
| 5 st | 31.75 kg |
| 6 st | 38.1 kg |
| 7 st | 44.45 kg |
| 8 st | 50.8 kg |
| 9 st | 57.15 kg |
| 10 st | 63.5 kg |
| 11 st | 69.85 kg |
| 12 st | 76.2 kg |
| 13 st | 82.55 kg |
| 14 st | 88.9 kg |
| 15 st | 95.25 kg |
Note: All conversions use the exact factor of 6.35029318 kg per stone for maximum accuracy.
Converting between stone and kilograms is important for:
Weight conversion is essential for: