Stones to KG Converter
Convert stones to kilograms — one stone is 14 pounds, or 6.35 kg. Results update as you type; exact factors shown.
One stone is 6.3503 kilograms — see the exact factor, not a rounded rule of thumb.
How the stones to kg converter works
Mass converts through the kilogram. The avoirdupois pound has been exactly 0.45359237 kg since 1959, so an ounce is 28.349523125 g and a stone (14 lb) is 6.35029318 kg. A US short ton is 2,000 lb; an imperial long ton is 2,240 lb; a metric tonne is 1,000 kg.
Australia is fully metric under the National Measurement Act 1960; imperial units appear only in trade with the US and in older documents.
Common mass conversions
| From | To | Units |
|---|---|---|
| 1 st | 6.3503 kg | stone to kilograms |
| 5 st | 31.7515 kg | stones to kilograms |
| 8 st | 50.8023 kg | stones to kilograms |
| 9 st | 57.1526 kg | stones to kilograms |
| 10 st | 63.5029 kg | stones to kilograms |
| 11 st | 69.8532 kg | stones to kilograms |
| 12 st | 76.2035 kg | stones to kilograms |
| 13 st | 82.5538 kg | stones to kilograms |
| 14 st | 88.9041 kg | stones to kilograms |
| 15 st | 95.2544 kg | stones to kilograms |
| 16 st | 101.6047 kg | stones to kilograms |
| 20 st | 127.0059 kg | stones to kilograms |
Units in this converter and their exact factors
| Unit | Symbol | One unit in kilograms |
|---|---|---|
| milligram | mg | 0.000001 kilogram |
| gram | g | 0.001 kilogram |
| kilogram | kg | 1 kilogram |
| tonne (metric ton) | t | 1,000 kilogram |
| ounce | oz | 0.0283495231 kilogram |
| pound | lb | 0.45359237 kilogram |
| stone | st | 6.35029318 kilogram |
| US ton (short) | US ton | 907.18474 kilogram |
| imperial ton (long) | long ton | 1,016.0469088 kilogram |
FAQFrequently asked questions about mass conversion
How many kg is 1 stone?
6.35029 kg.
What is 12 stone in kg?
76.2 kg.
How many pounds in a stone?
Fourteen.
Who still uses stones?
Mainly the UK and Ireland for body weight. Almost nowhere else uses the unit, and it is rarely used for anything but people.
How do I write 76 kg in stones and pounds?
11 stone 13.6 lb — the whole number of stones, then the remainder in pounds.
Where these figures come from
- BIPM — The International System of Units (SI Brochure, 9th edition) — definitions of the base and derived units.
- NIST Special Publication 811 — Guide for the Use of the International System of Units — the exact conversion factors used here.
- National Measurement Institute (NMI) — Australia's national measurement authority.
Last checked: September 2026. Conversion factors are fixed by definition and do not change with tax years or regulations.