stone to kg – convert stone to kilograms
Convert stone to kg (stone to kilograms) for body weight, fitness tracking, medical forms and health targets. This page links to the main mass converter with st → kg pre-selected.
Open the interactive st → kg converter:
Use main converter (st → kg) or switch to kg → stYou can also view the equivalent in pounds (lb) and ounces directly on the homepage using the same input.
Quick reference: stone to kilograms
1 stone is 14 lb, or 6.35029 kg. Common values:
| Stone (st) | Kilograms (kg, approx.) |
|---|---|
| 8 st | 50.8 kg |
| 9 st | 57.2 kg |
| 10 st | 63.5 kg |
| 11 st | 69.9 kg |
| 12 st | 76.2 kg |
| 13 st | 82.6 kg |
| 14 st | 88.9 kg |
Why convert stone to kilograms?
People usually convert stone to kg when they:
- Live in the UK or Ireland but use health apps based on kilograms.
- Calculate BMI or follow medical guidance written in metric.
- Share weight data with doctors or trainers in other countries.
- Compare old “stone and pounds” records with modern kg targets.
Other weight converters on this site
stone to kg FAQ
What is the formula for stone to kilograms?
Multiply stone by 6.35029. Example: 12 st × 6.35029 ≈ 76.2 kg.
How do I convert “stone and pounds” to kg?
First convert everything to pounds (stone × 14 + extra lb), then multiply by 0.45359237, or use the main converter with both inputs.
Is stone an official metric unit?
No. Stone is a traditional UK unit. The metric SI unit for mass is the kilogram (kg).
Page last updated: 2 December 2025.