This stone to kilograms converter gives you the st to kg result instantly, in your browser, with the exact ratio so you can verify it. 1 stone is about 6.35029 kilograms, and going the other way, 1 kilogram is 0.157473 stone. Stone are an imperial unit still common in the United States and the United Kingdom; kilograms are part of the metric system used in most countries.
To convert by hand, multiply the number of stone by 6.35029. For example, 10 stone is 63.5029 kilograms and 100 stone is 635.029 kilograms. The table below lists the most requested values, and the converter above accepts decimals for anything in between.
st to kg formula
kg = st × 6.35029
1 stone is about 6.35029 kilograms. Multiply the value in stone by that factor to get kilograms.
Stone to Kilograms conversion table
| stone | kilograms | Rounded |
|---|---|---|
| 1 st | 6.35029 kg | 6.35 |
| 2 st | 12.7006 kg | 12.7 |
| 3 st | 19.0509 kg | 19.1 |
| 4 st | 25.4012 kg | 25.4 |
| 5 st | 31.7515 kg | 31.8 |
| 6 st | 38.1018 kg | 38.1 |
| 7 st | 44.4521 kg | 44.5 |
| 8 st | 50.8023 kg | 50.8 |
| 9 st | 57.1526 kg | 57.2 |
| 10 st | 63.5029 kg | 63.5 |
| 12 st | 76.2035 kg | 76.2 |
| 15 st | 95.2544 kg | 95.3 |
| 20 st | 127.006 kg | 127 |
| 25 st | 158.757 kg | 159 |
| 30 st | 190.509 kg | 191 |
| 40 st | 254.012 kg | 254 |
| 50 st | 317.515 kg | 318 |
| 60 st | 381.018 kg | 381 |
| 70 st | 444.521 kg | 445 |
| 75 st | 476.272 kg | 476 |
| 80 st | 508.023 kg | 508 |
| 90 st | 571.526 kg | 572 |
| 100 st | 635.029 kg | 635 |
| 150 st | 952.544 kg | 953 |
| 200 st | 1,270.06 kg | 127 |
| 250 st | 1,587.57 kg | 1,588 |
| 300 st | 1,905.09 kg | 1,905 |
| 500 st | 3,175.15 kg | 3,175 |
| 750 st | 4,762.72 kg | 4,763 |
| 1,000 st | 6,350.29 kg | 635 |
Frequently asked questions
How many kilograms are in 5 stone?
5 st = 31.7515 kg. Multiply 5 by 6.35029, the number of kilograms in one stone. The converter on this page does the same arithmetic for any value, including decimals.
What is the formula to convert stone to kilograms?
kg = st × 6.35029. The factor comes from the definitions of the units: 1 stone is about 6.35029 kilograms. Worked example: 12 st = 76.2035 kg.
Is 30 st the same as 190.509 kg?
Yes. 30 st = 190.509 kg. Rounded to four decimals it is 190.5 kg.
How do I convert kilograms back to stone?
Divide by 6.35029, or multiply by 0.157473: 1 kilogram is 0.157473 stone. The kilograms to stone page linked above lists common values the other way.
Is the st to kg conversion exact?
1 stone is about 6.35029 kilograms. The ratio is a defined constant but produces a long decimal, so this page rounds to six significant digits, which is more precision than any everyday measurement needs.