Seldons
stone to kg
1 stone = 6.35029 kilograms.
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How do you convert stone to kilograms?
Use this formula. It is exact — these units are defined by international agreement, not measured.
kg = st × 6.35029318
Example: 10 st × 6.35029318 = 63.5029 kg.
stone to kg conversion table
Common values, rounded to six significant figures.
| st | kg |
|---|---|
| 1 st | 6.35029 kg |
| 2 st | 12.7006 kg |
| 3 st | 19.0509 kg |
| 4 st | 25.4012 kg |
| 5 st | 31.7515 kg |
| 6 st | 38.1018 kg |
| 7 st | 44.4521 kg |
| 8 st | 50.8023 kg |
| 9 st | 57.1526 kg |
| 10 st | 63.5029 kg |
| 11 st | 69.8532 kg |
| 12 st | 76.2035 kg |
| 13 st | 82.5538 kg |
| 14 st | 88.9041 kg |
| 15 st | 95.2544 kg |
| 20 st | 127.006 kg |
A weight given in stones has to become kilograms for any medical chart, airline allowance or piece of equipment rated in metric. One stone is 6.35029318 kg, so the rule of thumb that a stone is 6.35 kg is accurate to better than a gram — unusually forgiving for an imperial unit.
Values worth remembering
These come up often enough that knowing them saves a lookup.
- 1 st = 6.35029 kgone stone
- 11 st = 69.8532 kgan average adult
Questions people ask
How many kilograms is 1 stone?
1 stone is 6.35029 kilograms.
How many stone is 1 kilogram?
1 kilogram is 0.157473 stone.
How do you convert stone to kilograms in your head?
Use × 6.35. That lands within a percent or so of the exact figure, which is close enough for packing, shipping estimates and shopping — use the calculator when the number has to be right.
Is the stone to kilogram conversion exact?
Yes. The relationship is exact by international agreement, so 6.35029318 is a definition rather than a measurement. Rounding in the answer comes from display, not from the conversion.