Stone to Kilograms
Convert stone to kilograms instantly.
Stone to Kilograms (st to kg) Converter
1 stone = 6.3503 kilograms
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- 1 st = 6.3503 kg
- 5 st = 31.751 kg
- 10 st = 63.503 kg
- 25 st = 158.76 kg
- Kilogramskg
- Poundslb
- Stone (UK)st
- Kilogramskg
- Poundslb
How it’s calculated
kg = st × 6.35029318
- Multiply the value in stone by 6.35029318.
- To go back, divide by 6.35029318 (or multiply by 0.1574730444).
- 1 st = 6.35029318 kg · 1 kg = 0.1574730444 st
Quick examples
1 stone = 6.3503 kilograms · 1 kg = 0.15747 st
- 1 stone = 6.3503 kilograms
- 5 stone = 31.751 kilograms
- 10 stone = 63.503 kilograms
- 25 stone = 158.76 kilograms
- 100 stone = 635.03 kilograms
Stone to kilograms conversion table
| Stone (st) | Kilograms (kg) |
|---|---|
| 0.1 st | 0.63503 kg |
| 0.5 st | 3.1751 kg |
| 1 st | 6.3503 kg |
| 2 st | 12.701 kg |
| 3 st | 19.051 kg |
| 4 st | 25.401 kg |
| 5 st | 31.751 kg |
| 6 st | 38.102 kg |
| 7 st | 44.452 kg |
| 8 st | 50.802 kg |
| 9 st | 57.153 kg |
| 10 st | 63.503 kg |
| 15 st | 95.254 kg |
| 20 st | 127.01 kg |
| 25 st | 158.76 kg |
| 30 st | 190.51 kg |
| 40 st | 254.01 kg |
| 50 st | 317.51 kg |
| 75 st | 476.27 kg |
| 100 st | 635.03 kg |
| 250 st | 1,587.6 kg |
| 500 st | 3,175.1 kg |
| 1,000 st | 6,350.3 kg |
About these units
Stone (st)
British imperial
1 st = 6.35029318 kg (exact)
Exactly 14 pounds (6.35029318 kg). Common for body weight in the UK and Ireland.
Source: NIST SP 811 / Handbook 44
Kilogram (kg)
SI (metric)
Base unit
The SI base unit of mass. Since 2019 it has been defined using a constant of nature (the Planck constant) instead of a metal reference weight.
Source: BIPM SI Brochure (9th ed.)
Frequently asked questions
How do I convert stone to kilograms?
Use kg = st × 6.35029318. Multiply the value in stone by 6.35029318.
How many kilograms are in 1 stone?
1 stone (st) equals 6.3503 kilograms (kg); more precisely 6.35029318.
How many stone are in 1 kilogram?
1 kilogram (kg) equals 0.15747 stone (st); more precisely 0.1574730444.
What is 10 st in kg?
10 stone = 63.503 kilograms.
Is the stone a US or a UK unit?
This converter uses the British imperial stone. Exactly 14 pounds (6.35029318 kg). Common for body weight in the UK and Ireland. US and UK units with the same name can differ, so check which one your source uses.
What is a stone?
Exactly 14 pounds (6.35029318 kg). Common for body weight in the UK and Ireland.
What is a kilogram?
The SI base unit of mass. Since 2019 it has been defined using a constant of nature (the Planck constant) instead of a metal reference weight.
Related conversions
Formula: kg = st × 6.35029318. Factors last reviewed 2026-10-27.