Stone to KG Converter
Stone and pounds to kilograms for NHS forms, gyms and scales that only show metric – with a 5–30 stone chart.
- Kilograms & grams
- Works with stone and pounds
- Free, no sign-up
On this page
Enter a weight in stone and pounds and get it in kilograms – useful for NHS forms, gym equipment, airline baggage limits and any scale that only shows metric. The result also shows total pounds and grams, and the second panel converts kilograms back to stone.
How to convert stone to kilograms
A stone is 14 pounds and a pound is 0.45359237 kg, so 1 stone = 6.35029 kg. If the weight has pounds in it as well, turn everything into pounds first:
Total pounds = (stone × 14) + poundsKilograms = total pounds × 0.45359 — or for whole stone simply kg = stone × 6.35029
Example: 12 st 7 lb in kg
- 12 × 14 = 168, plus 7 = 175 lb
- 175 × 0.45359 = 79.4 kg
Example: 13 stone in kg
- 13 × 6.35029 = 82.6 kg
For a rough figure in your head, multiply the stone by 6.35 – or take the stone, multiply by 6 and add 5%. Ten stone is 63.5 kg, so every stone above or below ten adds or removes about 6.35 kg.
Stone to kg conversion chart
From 5 stone to 30 stone in half-stone (7 lb) steps. Kilograms are rounded to one decimal place.
| Stone | Kilograms | Pounds |
|---|---|---|
| 5 st | 31.8 kg | 70 lb |
| 5 st 7 lb | 34.9 kg | 77 lb |
| 6 st | 38.1 kg | 84 lb |
| 6 st 7 lb | 41.3 kg | 91 lb |
| 7 st | 44.5 kg | 98 lb |
| 7 st 7 lb | 47.6 kg | 105 lb |
| 8 st | 50.8 kg | 112 lb |
| 8 st 7 lb | 54.0 kg | 119 lb |
| 9 st | 57.2 kg | 126 lb |
| 9 st 7 lb | 60.3 kg | 133 lb |
| 10 st | 63.5 kg | 140 lb |
| 10 st 7 lb | 66.7 kg | 147 lb |
| 11 st | 69.9 kg | 154 lb |
| 11 st 7 lb | 73.0 kg | 161 lb |
| 12 st | 76.2 kg | 168 lb |
| 12 st 7 lb | 79.4 kg | 175 lb |
| 13 st | 82.6 kg | 182 lb |
| 13 st 7 lb | 85.7 kg | 189 lb |
| 14 st | 88.9 kg | 196 lb |
| 14 st 7 lb | 92.1 kg | 203 lb |
| 15 st | 95.3 kg | 210 lb |
| 15 st 7 lb | 98.4 kg | 217 lb |
| 16 st | 101.6 kg | 224 lb |
| 16 st 7 lb | 104.8 kg | 231 lb |
| 17 st | 108.0 kg | 238 lb |
| 17 st 7 lb | 111.1 kg | 245 lb |
| Stone | Kilograms | Pounds |
|---|---|---|
| 18 st | 114.3 kg | 252 lb |
| 18 st 7 lb | 117.5 kg | 259 lb |
| 19 st | 120.7 kg | 266 lb |
| 19 st 7 lb | 123.8 kg | 273 lb |
| 20 st | 127.0 kg | 280 lb |
| 20 st 7 lb | 130.2 kg | 287 lb |
| 21 st | 133.4 kg | 294 lb |
| 21 st 7 lb | 136.5 kg | 301 lb |
| 22 st | 139.7 kg | 308 lb |
| 22 st 7 lb | 142.9 kg | 315 lb |
| 23 st | 146.1 kg | 322 lb |
| 23 st 7 lb | 149.2 kg | 329 lb |
| 24 st | 152.4 kg | 336 lb |
| 24 st 7 lb | 155.6 kg | 343 lb |
| 25 st | 158.8 kg | 350 lb |
| 25 st 7 lb | 161.9 kg | 357 lb |
| 26 st | 165.1 kg | 364 lb |
| 26 st 7 lb | 168.3 kg | 371 lb |
| 27 st | 171.5 kg | 378 lb |
| 27 st 7 lb | 174.6 kg | 385 lb |
| 28 st | 177.8 kg | 392 lb |
| 28 st 7 lb | 181.0 kg | 399 lb |
| 29 st | 184.2 kg | 406 lb |
| 29 st 7 lb | 187.3 kg | 413 lb |
| 30 st | 190.5 kg | 420 lb |
Stone and pounds to kg: the in-between weights
Most people weigh something-and-a-bit. This table covers 9 to 16 stone with every pound in between so you can read straight across without doing any maths.
| lb → | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 9 st | 57.2 | 57.6 | 58.1 | 58.5 | 59.0 | 59.4 | 59.9 | 60.3 | 60.8 | 61.2 | 61.7 | 62.1 | 62.6 | 63.0 |
| 10 st | 63.5 | 64.0 | 64.4 | 64.9 | 65.3 | 65.8 | 66.2 | 66.7 | 67.1 | 67.6 | 68.0 | 68.5 | 68.9 | 69.4 |
| 11 st | 69.9 | 70.3 | 70.8 | 71.2 | 71.7 | 72.1 | 72.6 | 73.0 | 73.5 | 73.9 | 74.4 | 74.8 | 75.3 | 75.7 |
| 12 st | 76.2 | 76.7 | 77.1 | 77.6 | 78.0 | 78.5 | 78.9 | 79.4 | 79.8 | 80.3 | 80.7 | 81.2 | 81.6 | 82.1 |
| 13 st | 82.6 | 83.0 | 83.5 | 83.9 | 84.4 | 84.8 | 85.3 | 85.7 | 86.2 | 86.6 | 87.1 | 87.5 | 88.0 | 88.5 |
| 14 st | 88.9 | 89.4 | 89.8 | 90.3 | 90.7 | 91.2 | 91.6 | 92.1 | 92.5 | 93.0 | 93.4 | 93.9 | 94.3 | 94.8 |
| 15 st | 95.3 | 95.7 | 96.2 | 96.6 | 97.1 | 97.5 | 98.0 | 98.4 | 98.9 | 99.3 | 99.8 | 100.2 | 100.7 | 101.2 |
| 16 st | 101.6 | 102.1 | 102.5 | 103.0 | 103.4 | 103.9 | 104.3 | 104.8 | 105.2 | 105.7 | 106.1 | 106.6 | 107.0 | 107.5 |
Values in kilograms. Read down to your stone, across to your pounds.
Frequently asked questions
How many kg is 10 stone?
10 stone is 63.5 kg (140 lb). 10 st 7 lb – ten and a half stone – is 66.7 kg.
What is 12 stone in kg?
12 stone is 76.2 kg (168 lb). 12 st 7 lb is 79.4 kg and 12 st 10 lb is 80.7 kg.
What is 13 stone in kg?
13 stone is 82.6 kg (182 lb). 13 st 7 lb is 85.7 kg.
What is 14 stone in kg?
14 stone is 88.9 kg (196 lb). 14 st 7 lb is 92.1 kg.
What is 11 stone in kg?
11 stone is 69.9 kg (154 lb). 11 st 7 lb is 73.0 kg.
How many pounds are in a stone?
There are exactly 14 pounds in a stone. So 8 stone is 112 lb, 10 stone is 140 lb, and 15 stone is 210 lb.
How do I convert stone to kg quickly without a calculator?
Multiply the stone by 6.35. If there are extra pounds, add 0.45 kg for each pound. For example 11 st 4 lb: 11 × 6.35 = 69.9, plus 4 × 0.45 = 1.8, giving about 71.7 kg (exact: 71.67 kg).
Why do I weigh a different amount in stone than my app says in kg?
Usually it is rounding. Apps and scales often round kilograms to the nearest 0.1 kg and stone to the nearest pound, and the two roundings do not always line up. 0.5 kg is just over a pound, so a half-kilo difference can flip the pound reading. Our converter shows one decimal place in both directions so you can see exactly where the rounding happens.
