Density and Mass
sttokg
Convert stones (st) to kilograms (kg).
Factor1 st = 6.35029 kg
Converter
st
Accepts numbers or expressions, e.g. 150 + 14.7
Result
kg
Rendered to 6 significant figures.
Formula
Formula
kg = st × 6.35029
Multiply any value in stones by 6.35029 to obtain the value in kilograms.
Worked example
Convert 12 st to kg.
- 01Start with 12 st.
- 02Multiply by the conversion factor: 12 × 6.35029 = 76.2035 kg.
Result12 st = 76.2035 kg
Conversion table
| st | kg |
|---|---|
| 1 | 6.3503 |
| 2 | 12.701 |
| 5 | 31.751 |
| 10 | 63.503 |
| 20 | 127.01 |
| 50 | 317.51 |
| 100 | 635.03 |
| 200 | 1270.1 |
| 500 | 3175.1 |
| 1000 | 6350.3 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from st to kg?
1 st equals 6.35029 kg. To convert, multiply the value in stones by 6.35029.
How do I convert 1 st to kg?
1 st = 6.35029 kg. For any value, multiply by 6.35029.
How do I convert kg back to st?
Divide by the same factor — or equivalently, multiply by 0.1574731. So 1 kg = 0.157473 st.
When would I need to convert stone (UK avoirdupois) to kilogram?
Mass conversions appear in material balances, reagent dosing, and reconciling vendor specifications across imperial/metric systems.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).