Stone to Kg Converter
Convert stone and pounds into kilograms.
Your result
Updates as you type. Based on 2025/26 UK figures where relevant.
How this is worked out
One stone is 14 pounds and one pound is 0.45359 kg. Convert everything to pounds, then multiply by 0.45359.
Tips
- UK pints and gallons are larger than US ones.
- One stone is 14 pounds.
- An inch is exactly 2.54 centimetres by definition.
Guides for this calculator
- How to Calculate Stone to Kg Conversions in the UK: Step-by-Step Guide
- Stone to Kg Conversions: Common Mistakes, Tips and FAQs
More conversions calculators
Frequently asked questions
How does the stone to Kg Converter work?
One stone is 14 pounds and one pound is 0.45359 kg. Convert everything to pounds, then multiply by 0.45359.
Are the conversion factors exact?
Yes. We use the official defined values, such as 1 inch = 2.54 cm and 1 lb = 0.45359237 kg.
Why does the UK still use imperial units?
Metric is official for most trade, but imperial units remain legal and common for road distances, beer and milk, and personal height and weight.
Can I convert the other way?
Yes – divide by the same factor, or use a related converter on this site.
This calculator gives an estimate for general information. It isn't financial, tax, legal or medical advice. Check official figures on GOV.UK or NHS.uk, or speak to a qualified adviser.