Stone to Kilograms Converter (st to kg)
Convert stone to kilograms instantly. 1 st = 6.35 kg. Includes the formula, a full conversion table and a calculator that works offline.
The formula
To convert stone to kilograms, multiply by 6.35:
kg = st × 6.35Going the other way, divide instead — or multiply by 0.1575, which is the same thing:
st = kg × 0.1575Stone to Kilograms conversion table
| Stone | Kilograms |
|---|---|
| 1 st | 6.35 kg |
| 2 st | 12.701 kg |
| 3 st | 19.051 kg |
| 4 st | 25.401 kg |
| 5 st | 31.751 kg |
| 6 st | 38.102 kg |
| 7 st | 44.452 kg |
| 8 st | 50.802 kg |
| 9 st | 57.153 kg |
| 10 st | 63.503 kg |
| 15 st | 95.254 kg |
| 20 st | 127.01 kg |
| 25 st | 158.76 kg |
| 30 st | 190.51 kg |
| 40 st | 254.01 kg |
| 50 st | 317.51 kg |
| 75 st | 476.27 kg |
| 100 st | 635.03 kg |
| 250 st | 1,587.57 kg |
| 500 st | 3,175.15 kg |
| 1000 st | 6,350.29 kg |
Kilograms to Stone
| Kilograms | Stone |
|---|---|
| 1 kg | 0.1575 st |
| 2 kg | 0.3149 st |
| 3 kg | 0.4724 st |
| 4 kg | 0.6299 st |
| 5 kg | 0.7874 st |
| 6 kg | 0.9448 st |
| 7 kg | 1.102 st |
| 8 kg | 1.26 st |
| 9 kg | 1.417 st |
| 10 kg | 1.575 st |
What that actually looks like
A conversion factor is hard to judge on its own. These are quantities most people already have a feel for, converted for you:
- An average adult is around 11 stone — 69.853 kg
- A large dog is about 5 stone — 31.751 kg
Why both units are still in use
Weight is where the two systems collide most awkwardly. Recipes, gym equipment, baggage allowances and medical charts each pick a side, and they do not agree. Airlines are the common trap: an allowance quoted in kilograms at one end of a journey can be quoted in pounds at the other, and the numbers are close enough to look interchangeable while being more than twice apart.
Mistakes worth avoiding
Pounds and ounces have the same trap: 8 pounds 6 ounces is 8.375 pounds, not 8.6, because an ounce is a sixteenth of a pound. And a stone is 14 pounds, so 11 stone 3 is 157 pounds rather than 113.
The other habit worth breaking is rounding too early. Convert first, round once at the end, and you avoid the drift that turns a small approximation into a visible error by the third calculation.
Doing it in your head
When you only need a rough answer, multiply by 13 and divide by 2 — which lands within 2.4 percent of the true value. Ten stone works out at roughly 65 kilograms that way, against 63.503 exactly. An estimate is enough for deciding whether something will fit or whether a figure sounds plausible. When the number has to be right — because you are buying, cooking or building to it — use the calculator and let it carry the decimals.
Common questions
How many kilograms are in one stone?
One stone equals 6.35 kilograms. The calculator above handles any value, including decimals and very large numbers, and updates as you type.
Is this an exact conversion?
Yes — this is an exact defined ratio, not an approximation. The table rounds for readability; the calculator does not.
Does this work offline?
Yes. The conversion runs in your browser with no network request, so it works on a plane, in a basement, or on a phone with no signal once the page has loaded.