Free Stone to kg Converter
1 stone = 6.350 kg
Enter a value for instant conversion
Understanding Stones and Kilograms
The kilogram (kg) serves as the SI base unit for mass and is recognized worldwide for nearly all weight measurements. The stone (st) belongs to the imperial and US customary systems and remains a standard unit for expressing body weight in the United Kingdom and, to a lesser extent, the United States. One stone is defined as 14 pounds (lb), which equals approximately 6.35 kg. For precise work the exact conversion factor is:
which is commonly rounded to 6.35029 kg for everyday calculations.
How to Convert Stones to Kilograms
The conversion is a simple multiplication: multiply the mass in stones by 6.35029 to obtain the mass in kilograms:
As an example, converting 15 stones:
This stone to kg converter handles the calculation instantly. Enter a value in stones, and the tool displays the corresponding kilograms. It also operates as a kg to stone converter — input kilograms, and the tool outputs the stone equivalent.
Quick Reference Table
| Stones | Kilograms |
|---|---|
| 1 st | 6.3503 kg |
| 5 st | 31.7515 kg |
| 8 st | 50.8023 kg |
| 10 st | 63.5029 kg |
| 12 st | 76.2035 kg |
| 15 st | 95.2544 kg |
| 20 st | 127.0058 kg |
All values use the factor 6.35029, providing high accuracy for personal fitness tracking, medical records, and any other application that requires st to kg conversion.
Why This UK Weight Converter Is Useful
Because the stone remains the preferred unit for human body weight in the UK, a dependable stone to kilograms tool is valuable for healthcare professionals, coaches, and anyone working across different measurement systems. This UK weight converter delivers instant, error‑free results, eliminating manual arithmetic and minimizing mistakes. Its bidirectional design supports both stone‑to‑kg and kg‑to‑stone conversions, covering all common weight conversion needs.
FAQ
1. How do I convert stones to kilograms?
Multiply the number of stones by 6.35029 to obtain the mass in kilograms. For example, 10 st × 6.35029 = 63.5029 kg.
2. What is the precise conversion factor from stone to kilogram?
One stone equals exactly 6.35029318 kg. Most practical applications use the rounded figure 6.35029 kg.
3. Can this tool convert kilograms back to stones?
Yes, the converter works both ways. Simply input the value in kilograms and the tool will show the equivalent stone weight.
4. Why is stone still commonly used in the UK for body weight?
Stone is a traditional imperial unit that remains familiar and convenient for everyday weight discussions in the UK, especially for human body weight.
5. What is 8 stone in kilograms?
8 stones multiplied by 6.35029 equals 50.8023 kg. You can get this result instantly using the converter.
How to Use
- Enter stone to convert to kilograms, or enter kilograms to convert to stone.
- Click Convert to see the result instantly.
- 1 stone = 6.350 kilograms. The UK standard unit for body weight.