Stone to Kg Converter
Convert stones and pounds to kilograms. Bidirectional stone/kg converter commonly used in the UK and Ireland for body weight.Updated 2026-03-16
Stone + Pounds → Kilograms
Formula: kg = (stone × 14 + pounds) × 0.453592 or kg = stone × 6.35029
Common Stone to Kg Conversions
| Stone | Kilograms (kg) | Pounds (lbs) |
|---|---|---|
| 6 st | 38.10 kg | 84 lbs |
| 7 st | 44.45 kg | 98 lbs |
| 8 st | 50.80 kg | 112 lbs |
| 9 st | 57.15 kg | 126 lbs |
| 10 st | 63.50 kg | 140 lbs |
| 11 st | 69.85 kg | 154 lbs |
| 12 st | 76.20 kg | 168 lbs |
| 13 st | 82.55 kg | 182 lbs |
| 14 st | 88.90 kg | 196 lbs |
| 15 st | 95.25 kg | 210 lbs |
| 16 st | 101.60 kg | 224 lbs |
| 17 st | 107.95 kg | 238 lbs |
| 18 st | 114.31 kg | 252 lbs |
| 19 st | 120.66 kg | 266 lbs |
| 20 st | 127.01 kg | 280 lbs |
| 25 st | 158.76 kg | 350 lbs |
| 30 st | 190.51 kg | 420 lbs |
How to Convert Stone to Kilograms
One stone equals 6.35029 kg (or exactly 14 pounds).
To convert stone and pounds to kg: multiply the stone by 6.35029, then add the pounds × 0.453592.
Example: 11 st 7 lbs = (11 × 6.35029) + (7 × 0.453592) = 69.85 + 3.18 = 73.03 kg.
💡 The stone is used primarily in the UK and Ireland for measuring body weight. All calculations happen locally in your browser.
Frequently Asked Questions
How many kg is 1 stone?
1 stone equals approximately 6.35029 kilograms, or exactly 14 pounds.
How many pounds are in a stone?
There are exactly 14 pounds in one stone. So 10 stone = 140 pounds.
What is 12 stone in kg?
12 stone equals approximately 76.20 kg (12 × 6.35029 = 76.20).
Where is stone used as a unit of weight?
The stone is primarily used in the United Kingdom and Ireland, especially for expressing body weight. Most other countries use kilograms.
"Stone to Kg Converter." ConvKit, conv-kit.com, https://conv-kit.com/tools/stone-to-kg/. Accessed 2026-03-16.