Stone to Kilograms Converter
Convert stone to kilograms instantly. One stone equals exactly 6.350293 kilograms. Type in either box to convert both ways, then use the chart, worked examples and everyday sizes below.
How to convert stone to kilograms
Worked example: convert 35 stone to kilograms. Using kilograms ← stone × 6.35029318, we get 35 × 6.35029318 = 222.26026 kg. To check the result, convert back: 222.26026 kg ÷ 6.35029318 = 35 st.
Stone to kilograms chart
| Stone (st) | Kilograms (kg) |
|---|---|
| 1 st | 6.350293 kg |
| 2 st | 12.70059 kg |
| 3 st | 19.05088 kg |
| 4 st | 25.40117 kg |
| 5 st | 31.75147 kg |
| 6 st | 38.10176 kg |
| 8 st | 50.80235 kg |
| 10 st | 63.50293 kg |
| 12 st | 76.20352 kg |
| 15 st | 95.2544 kg |
| 20 st | 127.0059 kg |
| 25 st | 158.7573 kg |
| 30 st | 190.5088 kg |
| 40 st | 254.0117 kg |
| 50 st | 317.5147 kg |
| 75 st | 476.272 kg |
| 100 st | 635.0293 kg |
| 150 st | 952.544 kg |
| 200 st | 1,270.059 kg |
| 250 st | 1,587.573 kg |
| 500 st | 3,175.147 kg |
| 1,000 st | 6,350.293 kg |
Kilograms to stone (reverse)
| Kilograms (kg) | Stone (st) |
|---|---|
| 1 kg | 0.157473 st |
| 2 kg | 0.3149461 st |
| 5 kg | 0.7873652 st |
| 10 kg | 1.57473 st |
| 20 kg | 3.149461 st |
| 50 kg | 7.873652 st |
| 100 kg | 15.7473 st |
| 250 kg | 39.36826 st |
| 500 kg | 78.73652 st |
| 1,000 kg | 157.473 st |
About the stone and the kilogram
A stone is 14 pounds, or about 6.35 kilograms. It is used almost only in the UK and Ireland, mainly for body weight: someone who weighs 11 stone 7 pounds weighs 161 pounds.
The kilogram is the SI base unit of mass. Since May 2019 it has been defined using the Planck constant instead of the old platinum-iridium cylinder kept near Paris. It is used for body weight and groceries in most countries.
One stone equals 6.350293 kilograms, which makes the stone the heavier unit of the two.
Everyday sizes in stone and kilograms
| Everyday example (approximate) | In stone | In kilograms |
|---|---|---|
| A liter of water | 0.15747 st | 1 kg |
| A newborn baby | 0.53541 st | 3.4 kg |
| A bowling ball (maximum) | 1.1433 st | 7.26 kg |
| An average adult | 11.81 st | 75 kg |
| A grand piano | 47.242 st | 300 kg |
| A small car | 188.97 st | 1,200 kg |
Stone to kilograms FAQ
How many kilograms are in one stone?
One stone equals exactly 6.35029318 kilograms. In the other direction, one kilogram equals 0.15747304 stone.
How do I convert stone to kilograms without a calculator?
convert 35 stone to kilograms. Using kilograms ← stone × 6.35029318, we get 35 × 6.35029318 = 222.26026 kg. To check the result, convert back: 222.26026 kg ÷ 6.35029318 = 35 st. For a quick estimate, round the factor to 6.4. Then 35 st is about 224 kg, compared with the exact 222.26 kg (an error of 0.78%). That is close enough for planning, but use the calculator above when the number matters.
What is a small car in kilograms?
A small car is about 188.97 stone, which is 1,200 kilograms. Treat that as an approximate everyday figure rather than an official measurement.
Are the stone and kilograms the same in every country?
The stone is exactly 14 pounds (6.35029318 kg). It is not used in the United States. The kilogram is defined from the Planck constant, so it is the same everywhere.