Stone to Kilogram Converter
Convert Stone (st) to Kilogram (kg). Results update as you type, with a conversion table and the formula below.
1 st =
6.3503 kg
st to kg conversion table
| st | kg |
|---|---|
| 1 | 6.3503 |
| 2 | 12.7006 |
| 3 | 19.0509 |
| 4 | 25.4012 |
| 5 | 31.7515 |
| 6 | 38.1018 |
| 7 | 44.4521 |
| 8 | 50.8023 |
| 9 | 57.1526 |
| 10 | 63.5029 |
| 15 | 95.2544 |
| st | kg |
|---|---|
| 20 | 127.0059 |
| 25 | 158.7573 |
| 30 | 190.5088 |
| 40 | 254.0117 |
| 50 | 317.5147 |
| 60 | 381.0176 |
| 70 | 444.5205 |
| 80 | 508.0235 |
| 90 | 571.5264 |
| 100 | 635.0293 |
How to use
- Type the st value to convert.
- The result appears instantly in kg; the swap button reverses direction.
- For common values, check the conversion table below.
Frequently asked questions
How many kg is 1 st?+
1 st = 6.3503 kg. The table below lists the values you'll reach for most often.
Why does only Britain use stones?+
The UK adopted the metric system officially, but customary units survived in everyday speech for body weight and height. Hospital records are kept in kilograms while people still describe themselves in stones.
How accurate are the results?+
The math uses internationally standardized definitions; only the display is rounded to significant digits. Accurate enough for school, work and daily life.
How do I convert kg back to st?+
Hit the swap arrows in the middle of the converter above — the direction flips and your value is kept.
Is it really free?+
Yes. No sign-up, no install, no usage limits. The site is ad-supported.
Unit guide
The formula
1 st equals 6.3503 kg — multiply a st value by 6.3503 to get kg. Example: 5 st × 6.3503 = 31.7515 kg.
Going the other way, 1 kg = 0.157473 st — multiply by 0.157473, or hit the swap button on the converter above.
When is this conversion needed?
Useful for gym plates, recipe ingredients, international shipping weights and body-weight figures in foreign articles.
The stone
Britain's unit for body weight. One stone is 14 pounds, about 6.35kg, and weights are given as combinations — '11 stone 4'. It is why weights quoted in British news and drama tend to mean nothing to everyone else.