Convert Stone to Kilograms
6 stone is 38.1 kg. One stone is exactly 6.35029318 kilograms.
6 stone is 38.101759 kilograms, because one stone is 6.3502932 kilograms. To convert stone to kilograms, multiply by 6.3502932; to go the other way, divide by 6.3502932 or multiply by 0.15747304. The relation is exact but the figure is not: it is a rounding of a number that does not terminate, and it follows from NIST Handbook 44. Fourteen pounds.
Factor checked against the defining standard · How we check
- Stone × 6.3502932
6 * 6.350293238.102 kg
6 stone in every weight unit
| Unit | Value | Exact factor |
|---|---|---|
| ounces | 1,344 oz | × 224 |
| pounds | 84 lb | × 14 |
| stone (as entered) | 6 st | — |
| US tons | 0.042 ton | × 0.007 |
| micrograms | 38,101,759,080 mcg | × 6,350,293,180 |
| milligrams | 38,101,759.08 mg | × 6,350,293.18 |
| centigrams | 3,810,175.908 cg | × 635,029.318 |
| grams | 38,101.75908 g | × 6,350.29318 |
| kilograms | 38.10175908 kg | × 6.35029318 |
| slugs | 2.610799814 slug | × 0.435133302402 |
| tonnes | 0.03810175908 t | × 0.00635029318 |
| carats | 190,508.7954 ct | × 31,751.4659 |
| troy ounces | 1,225 ozt | × 204.166666667 |
| grains | 588,000 gr | × 98,000 |
| long tons | 0.0375 LT | × 0.00625 |
Factors are entered by hand from NIST Handbook 44 rather than derived from a units library, so the ones that terminate are exact rather than rounded.
How do you convert stone to kilograms? The converter and the working
- 1.Take the measurement in stone.
- 2.Multiply by 6.3502932 — that is how many kilograms fit in one stone.
- 3.To go back the other way, divide by 6.3502932, or multiply by 0.15747304.
Worked example: 25 stone to kilograms
- Formula
- st × 6.3502932 = kg
- Arithmetic
- 25 × 6.3502932 = 158.76 kg
- Answer
- 25 st = 158.76 kg
The factor is rounded for display; the figure above is computed from the full value.
Stone to kilograms conversion table
| Stone | Kilograms |
|---|---|
| 1 st | 6.35 kg |
| 2 st | 12.7 kg |
| 3 st | 19.05 kg |
| 4 st | 25.4 kg |
| 5 st | 31.75 kg |
| 6 st | 38.1 kg |
| 7 st | 44.45 kg |
| 8 st | 50.8 kg |
| 9 st | 57.15 kg |
| 10 st | 63.5 kg |
| 12 st | 76.2 kg |
| 15 st | 95.25 kg |
| 20 st | 127.01 kg |
| 25 st | 158.76 kg |
| 50 st | 317.51 kg |
| 100 st | 635.03 kg |
| 200 st | 1,270.06 kg |
| 300 st | 1,905.09 kg |
| 500 st | 3,175.15 kg |
| 1000 st | 6,350.29 kg |
| 2000 st | 12,700.59 kg |
| 5000 st | 31,751.47 kg |
| 10000 st | 63,502.93 kg |
A stone is 6.35 kg, and it is a British unit only
Exactly 14 pounds, so 6.35029318 kg. UK medical records and bathroom scales use stones and pounds together; the US uses pounds alone and the rest of the world uses kilograms. A weight given as "11 st 4" is 11 × 6.35 + 4 × 0.4536 = 71.7 kg.
NIST Handbook 44, Appendix C — general tables of units of measurement
What is a stone?
Fourteen pounds. Still the everyday unit of body weight in Britain and Ireland, and nowhere else.
What is a kilogram?
The SI base unit of mass, defined since 2019 by fixing the Planck constant rather than by a metal cylinder in Paris.
How many kilograms are in a stone?
One stone is 6.3502932 kilograms. Going the other way, one kilogram is 0.15747304 stone. Both figures come from the same defined relation rather than from a measurement, which is why they are the same today as they were in 1959.
Every weight unit here
The whole group — 15 units with their symbols and the size of each one in kilograms — is on the conversion index, along with every pair it makes. The table above already gives each of them relative to a stone.
Cite this page
- APA
- Rule Calculator. (2026). Convert Stone to kilograms. Rule Calculator. https://rulecalculators.com/convert/stone-to-kilogram
- MLA
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- Chicago
- Rule Calculator. "Convert Stone to kilograms." Rule Calculator. Last reviewed August 16, 2026. https://rulecalculators.com/convert/stone-to-kilogram.
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Questions people actually ask
- How many kilograms are in a stone?
- 6.3502932. The SI base unit of mass, defined since 2019 by fixing the Planck constant rather than by a metal cylinder in Paris.
- How do I convert kilograms back to stone?
- Divide by 6.3502932, or multiply by 0.15747304 — they are the same operation.
The values people look up
Each one is this page with the value filled in, and each answers in its own title.
Other weight conversions
Kilograms to stone — the same conversion the other way.