Stone to Kilograms Converter
Convert stone to kilograms instantly with this free stone to kilograms converter. Enter any value to get an accurate weight & mass conversion, plus the formula, the conversion factor and a full reference table.
What is 1 stone in kilograms?
1 stone is equal to exactly 6.35029318 kilograms.
1 × 6.35029318 = 6.35029318 kilograms
1 stone = 6.35029318 kilograms
Stone to Kilograms formula
kg = st × 6.35029318
The stone to kilograms conversion factor is 6.35029318, which is exact by definition. 1 stone = 6.35029318 kilograms, and 1 kilogram = 0.157473044418 stone.
Worked examples
- 2 stone = 12.7005864 kilograms — 2 × 6.35029318 = 12.7005864 kilograms
- 6 stone = 38.1017591 kilograms — 6 × 6.35029318 = 38.1017591 kilograms
- 10 stone = 63.5029318 kilograms — 10 × 6.35029318 = 63.5029318 kilograms
Stone to Kilograms conversion table
Every value below is calculated with the exact conversion factor and rounded for display.
| Stone (st) | Kilograms (kg) |
|---|---|
| 1 st | 6.3502932 kg |
| 2 st | 12.700586 kg |
| 3 st | 19.05088 kg |
| 4 st | 25.401173 kg |
| 5 st | 31.751466 kg |
| 6 st | 38.101759 kg |
| 7 st | 44.452052 kg |
| 8 st | 50.802345 kg |
| 9 st | 57.152639 kg |
| 10 st | 63.502932 kg |
| 12 st | 76.203518 kg |
| 15 st | 95.254398 kg |
| 20 st | 127.00586 kg |
| 25 st | 158.75733 kg |
| 30 st | 190.5088 kg |
| 50 st | 317.51466 kg |
| 75 st | 476.27199 kg |
| 100 st | 635.02932 kg |
| 500 st | 3,175.1466 kg |
| 1,000 st | 6,350.2932 kg |
When you need to convert stone to kilograms
- Cooking from recipes that give ingredients by weight in a different system.
- Checking airline baggage allowances, which are quoted in kilograms almost everywhere except the US.
- Recording body weight, gym plate loads or shipping weights across regions.
Getting a feel for the scale
A converted number is easier to trust when you can picture it. These reference points let you sanity-check the result at a glance.
Stone (st)
- Stones are still used for body weight in the UK and Ireland
- 1 stone = 14 pounds
Kilogram (kg)
- A litre of water weighs 1 kg
- A bag of flour is usually 1 or 1.5 kg
Common mistakes to avoid
- Dividing when you should multiply. Because 1 stone = 6.35029 kilograms, the answer should be larger than the number you started with.
- Rounding too early. Convert first at full precision, then round the final answer to the precision the task actually needs.
How precise does the answer need to be?
Kitchen scales resolve to about 1 g or 0.1 oz, so two significant figures beyond the decimal point is wasted precision. Postage and freight are normally rounded up to the next billing increment.
How these units are defined
- Stone (st): 14 pounds; the everyday unit for body weight in the UK and Ireland. This unit's relationship to the SI base unit is exact by definition, so no rounding enters the conversion factor.
- Kilogram (kg): The SI base unit of mass, defined via the Planck constant. This unit's relationship to the SI base unit is exact by definition, so no rounding enters the conversion factor.
Related conversions
Frequently asked questions
- What is 1 stone in kilograms?
- 1 stone is equal to 6.35029318 kilograms.
- How many stone are in one kilogram?
- There are 0.157473044 stone in 1 kilogram.
- How do you convert stone to kilograms?
- Multiply the number of stone by 6.35029318 — or use the formula kg = st × 6.35029318.
- What is 6 stone in kilograms?
- 6 stone is 38.1017591 kilograms. 6 × 6.35029318 = 38.1017591 kilograms.
- Is the stone to kilograms conversion exact?
- Yes. The relationship is fixed by definition, so 6.35029318 is an exact conversion factor — only the displayed result is rounded.