Unit Converter
Stone to Kilograms Converter
Convert stone to kilograms instantly. 1 st = 6.3503 kg. Use our free online converter to translate UK/imperial weights to metric.
Kilograms
6.3503 kg
1 st = 6.3503 kg
Stone to Kilograms formula
kg = st × 6.3503The stone unit, used primarily in the UK and Ireland, equals 14 pounds. Since 1 pound is defined as 0.453592 kg, one stone converts to 6.3503 kg. This 6.3503 factor bridges imperial weight measurements with the metric kilogram standard.
Stone to Kilograms conversion table
| Stone (st) | Kilograms (kg) |
|---|---|
| 1 st | 6.3503 kg |
| 2 st | 12.7006 kg |
| 3 st | 19.0509 kg |
| 5 st | 31.7515 kg |
| 10 st | 63.5029 kg |
| 20 st | 127.01 kg |
| 25 st | 158.76 kg |
| 50 st | 317.51 kg |
| 100 st | 635.03 kg |
| 500 st | 3175.15 kg |
| 1000 st | 6350.29 kg |
When you need to convert stone to kilograms
- Checking your weight on UK scales and converting to metric for international health records
- Converting recipe ingredient weights from British cookbooks to metric measurements
- Comparing UK birth weights (often listed in stones and pounds) to metric hospital standards
- Understanding heritage weight data from UK historical records or antique scales
- Translating UK fitness and boxing weight classes to metric benchmarks for international training
Frequently asked questions
Why is stone used in the UK if the rest of the world uses kg?
The stone unit persists in UK culture through tradition and everyday use, particularly for body weight. While official standards shifted to metric, imperial units remain common in casual conversation and on bathroom scales.
Is 1 stone always exactly 6.3503 kg?
Yes. One stone is precisely defined as 14 pounds, and 14 × 0.453592 kg per pound equals exactly 6.3503 kg. This standardized conversion is universal.
When would I need to convert stone to kilograms?
When traveling to metric countries, filling medical forms with international standards, comparing weight specifications across regions, or reading UK nutrition and fitness information that uses stone for body weight references.