Stones to Kilograms Converter
Convert stones to kilograms instantly. Free st to kg converter with formula, reference table, and no signup.
What Is a Stones to Kilograms Converter?
The stone-to-kilogram conversion is primarily needed by people in the UK and Ireland who weigh themselves in stones but need kilograms for medical records, international forms, or fitness apps that use metric units. British expats living in metric countries frequently need this conversion, as do healthcare professionals interpreting patient weights from British patients.
The Conversion Formula
The formula to convert stones to kilograms is:
Kilograms = Stones × 6.35029
The reverse formula is: Stones = Kilograms ÷ 6.35029
Stones to Kilograms Reference Table
| Stones (st) | Kilograms (kg) |
|---|---|
| 1 st | 6.35 kg |
| 2 st | 12.70 kg |
| 3 st | 19.05 kg |
| 4 st | 25.40 kg |
| 5 st | 31.75 kg |
| 6 st | 38.10 kg |
| 7 st | 44.45 kg |
| 8 st | 50.80 kg |
| 9 st | 57.15 kg |
| 10 st | 63.50 kg |
| 11 st | 69.85 kg |
| 12 st | 76.20 kg |
| 13 st | 82.55 kg |
| 14 st | 88.90 kg |
| 15 st | 95.25 kg |
| 16 st | 101.60 kg |
| 17 st | 107.95 kg |
| 18 st | 114.31 kg |
| 19 st | 120.66 kg |
| 20 st | 127.01 kg |
How to Use This Converter
- Enter your stones value in the input field above.
- View the result — the kilograms equivalent appears instantly.
- For manual conversion, use the formula: Kilograms = Stones × 6.35029.
- Check the reference table above for 20 pre-calculated common values.
Related Conversions
- Kilograms to Stones Converter
- Kilograms to Pounds Converter
- Pounds to Kilograms Converter
- Ounces to Grams Converter
- Grams to Ounces Converter
All conversions are calculated client-side in your browser. No data is sent to any server. For the authoritative source on unit definitions, see the National Institute of Standards and Technology (NIST).
Frequently Asked Questions
How many kilograms are in a stone?
One stone equals exactly 6.35029 kilograms or 14 pounds. The stone is primarily used in the United Kingdom and Ireland for measuring body weight.
Who still uses stones for body weight?
The stone is commonly used in the UK and Ireland for personal body weight. Brits typically say 'I weigh 12 stone 4' rather than '78.5 kg' or '173 lbs.' It's rarely used outside of personal health contexts.
How do I convert stones and pounds to kg?
Multiply the stones by 6.35, convert the remaining pounds by multiplying by 0.4536, and add both results. Example: 11 stone 7 lbs = (11 × 6.35) + (7 × 0.4536) = 69.85 + 3.18 = 73.03 kg.
Why is a stone equal to 14 pounds?
The stone was originally a variable unit used in trade, but was standardized at 14 pounds in 1835 by the British Weights and Measures Act. The choice of 14 was likely because it divided evenly into the quarter (28 lbs) and hundredweight (112 lbs) used in trade.
The tools and calculators provided on The Simple Toolbox are intended for educational and informational purposes only. They do not constitute financial, legal, tax, or professional advice. While we strive to keep calculations accurate, numbers are based on user inputs and standard assumptions that may not apply to your specific situation. Always consult with a certified professional (such as a CPA, financial advisor, or attorney) before making significant financial or business decisions.
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