Stone to KG Converter
Helpful when a body weight given in stone needs to be entered in kilograms, for example on a medical form.
1 st = 6.3503 kg
kilograms
1 st = 6.3503 kg
How to convert stone to kilograms
Multiply the number of stone by 6.35029318.
Formula
kg = st × 6.35029318
Examples
- 9 st × 6.35029318 = 57.1526 kg
- 11.5 st × 6.35029318 = 73.0284 kg
- 15 st × 6.35029318 = 95.2544 kg
Stone to kilograms conversion table
| Stone (st) | Kilograms (kg) |
|---|---|
| 6 | 38.1018 |
| 7 | 44.4521 |
| 8 | 50.8023 |
| 9 | 57.1526 |
| 10 | 63.5029 |
| 10.5 | 66.6781 |
| 11 | 69.8532 |
| 11.5 | 73.0284 |
| 12 | 76.2035 |
| 12.5 | 79.3787 |
| 13 | 82.5538 |
| 14 | 88.9041 |
| 15 | 95.2544 |
| 16 | 101.6047 |
| 18 | 114.3053 |
| 20 | 127.0059 |
Values rounded to 4 decimal places or 4 significant digits.
About stone
The stone equals 14 pounds, about 6.35 kilograms. It is used mainly in the UK and Ireland for body weight, usually combined with pounds, as in "11 st 6 lb".
About kilograms
The kilogram is the SI base unit of mass. Since 2019 it has been defined by a fixed value of the Planck constant, replacing the metal prototype cylinder kept near Paris since 1889.
Frequently asked questions
How many kilograms are in one stone?
One stone equals 6.3503 kilograms (rounded).
How do I convert stone to kilograms?
Multiply the number of stone by 6.35029318. For example: 11.5 st × 6.35029318 = 73.0284 kg.
How many stone are in one kilogram?
One kilogram equals 0.1575 stone.
Is the st to kg conversion exact?
Yes. The factor follows directly from the official definitions of both units, so the only rounding is in how many decimals are displayed.