Instant Unit Conversion
Convert Stone to Kilograms (st to kg)
Exact formula, conversion factors, live calculator, and reference charts for stone to kilograms.
Method reviewed:Exact defined factors — international yard and pound (1959), US customary gallon and cup, SI — the values NIST SP 811 lists · reviewed September 2026
Direct AnswerFormula: kg = st × 6.35029318
1 stone is equal to exactly 6.35029318 kilograms. To convert stone to kilograms, multiply by 6.35029318.
Live Stone to Kilograms Calculator
Formula:
kg = st × 6.35029318Open full mass converter →Stone to Kilograms Conversion Table
Quick reference conversion chart from 1 to 100 stone.
| Stone (st) | Kilograms (kg) | Mathematical Formula |
|---|---|---|
| 1 st | 6.3503 kg | 1 × 6.35029 |
| 2 st | 12.7006 kg | 2 × 6.35029 |
| 5 st | 31.7515 kg | 5 × 6.35029 |
| 10 st | 63.5029 kg | 10 × 6.35029 |
| 15 st | 95.2544 kg | 15 × 6.35029 |
| 20 st | 127.0059 kg | 20 × 6.35029 |
| 25 st | 158.7573 kg | 25 × 6.35029 |
| 50 st | 317.5147 kg | 50 × 6.35029 |
| 75 st | 476.272 kg | 75 × 6.35029 |
| 100 st | 635.0293 kg | 100 × 6.35029 |
Frequently Asked Questions
How many kg is 12 stone?
12 stone is 76.2 kilograms.
How many pounds are in a stone?
Fourteen, exactly. The stone was standardised at 14 lb for general goods in 1835, having varied by trade before that.
What is 10 stone 7 pounds in kg?
Convert the pounds to a fraction of a stone first: 7 lb is half a stone, so 10 st 7 lb is 10.5 stone, which is 66.7 kg.