UnitConStone to Kilograms Converter
Convert stone to kilograms for health records, international travel, and gym tracking. People familiar with stone for body weight often need to convert to kilograms for medical forms, passport applications, or international fitness apps.
Formula
Multiply stone by 6.35029 to get kilograms. To reverse, divide kilograms by 6.35029 to get stone.
Quick reference
| Stone (st) | Kilogram (kg) |
|---|---|
| 8 | 50.80235 |
| 9 | 57.15264 |
| 10 | 63.50293 |
| 11 | 69.85322 |
| 12 | 76.20352 |
| 13 | 82.55381 |
| 14 | 88.9041 |
| 15 | 95.2544 |
| 16 | 101.6047 |
| 18 | 114.3053 |
About these units
Stone
The stone (14 pounds = 6.35029 kg) was one of many traditional weight standards used in Britain and Ireland. Each commodity (wool, cheese, butter) had its own stone of a different weight; the stone of 14 pounds became the general standard.
Kilogram
The kilogram was first defined in 1795 as the mass of one cubic decimeter of water at maximum density. Today defined by the Planck constant, it has been the international mass standard since the Metre Convention of 1875.
Frequently asked questions
10 × 6.35029 ≈ 63.50 kg.
Exactly 14 pounds, a standard that has been fixed in British statute for over a century.
Multiply the stone by 6.35029, then add the pounds × 0.453592. For example, 11 stone 4 lbs = (11 × 6.35029) + (4 × 0.453592) = 69.85 + 1.81 = 71.67 kg.