UnitSnapStone to Kilograms
1 st = 6.350293 kg
Stone to kilograms is used mostly by people in the United Kingdom and Ireland, where body weight is still commonly given in stone and pounds. Gyms, doctors, and international forms often require kilograms instead. One stone equals exactly 14 pounds, which is exactly 6.35029318 kg.
When you need to convert stone to kilograms
- Entering a body weight known in stone on a medical or fitness app set to kilograms
- Comparing a UK weight-loss goal with a metric diet plan
- Converting jockey or boxer weights described in stone
- Filling in travel or insurance forms that require kilograms
How to convert stone to kilograms
kg = st × 6.350293
Example: 5 st = 31.75147 kg
Common body weights in stone
| Stone (st) | Kilograms (kg) |
|---|---|
| 8 st | 50.80235 kg |
| 9 st | 57.15264 kg |
| 10 st | 63.50293 kg |
| 11 st | 69.85322 kg |
| 12 st | 76.20352 kg |
| 13 st | 82.55381 kg |
| 14 st | 88.9041 kg |
| 15 st | 95.2544 kg |
| 16 st | 101.6047 kg |
| 18 st | 114.3053 kg |
Tips for converting stone to kilograms
- Multiply stone by 6.35, or by 6.4 for mental math. The rounded factor is within about 1% of the exact value.
- A weight like 11 st 6 lb is not 11.6 st. Convert the stone and the extra pounds separately and add them.
- For extra pounds, each pound is about 0.45 kg, which keeps the add-on step simple.
Stone to Kilograms conversion table
| Stone (st) | Kilograms (kg) |
|---|---|
| 1 st | 6.350293 kg |
| 2 st | 12.70059 kg |
| 3 st | 19.05088 kg |
| 4 st | 25.40117 kg |
| 5 st | 31.75147 kg |
| 6 st | 38.10176 kg |
| 7 st | 44.45205 kg |
| 8 st | 50.80235 kg |
| 9 st | 57.15264 kg |
| 10 st | 63.50293 kg |
| 15 st | 95.2544 kg |
| 20 st | 127.0059 kg |
| 25 st | 158.7573 kg |
| 30 st | 190.5088 kg |
| 40 st | 254.0117 kg |
| 50 st | 317.5147 kg |
| 75 st | 476.272 kg |
| 100 st | 635.0293 kg |
| 250 st | 1,587.573 kg |
| 500 st | 3,175.147 kg |
| 1,000 st | 6,350.293 kg |
About the units
Stone: The stone is a British unit of mass equal to 14 pounds, or about 6.35 kilograms, still used for body weight in the UK and Ireland.
Kilograms: The kilogram is the SI base unit of mass, defined through the Planck constant. It is the everyday unit for body weight and groceries in most countries.
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Frequently asked questions
How many kilograms are in 1 stone?
1 stone equals 6.350293 kilograms.
How many stone are in 1 kilogram?
1 kilogram equals 0.157473 stone.
How do I convert stone to kilograms?
Use the formula kg = st × 6.350293.
What is 10 stone in kilograms?
10 stone equals 63.50293 kilograms.
Related conversions
Factors: NIST SP 811 · SI Brochure · NIST Handbook 44 — Updated