Stones to kg Converter
Convert British stones to kilograms for international weight comparison and fitness tracking.
How It Works
Formula: st to kg = value × 6.35029318
Example: 10 st = 63.502932 kg
Note: 1 stone equals 6.3503 kilograms (14 lbs), a British unit still used for body weight in the UK and Ireland.
Common Uses
Rounding Rule
Rounded to 4 decimal places
Error Margin
±0.0001 kg
Precision Guidance
For weight comparison, round to 1 decimal place. For records, keep 2-4 decimals.
Common Mistakes
A stone is 14 lbs, not 16. Do not confuse it with a US quarter (25 lbs).
Frequently Asked Questions
What is 1 stone in kg?
1 stone equals 6.3503 kilograms (1 st = 14 lbs = 6.35029318 kg).
How many pounds is a stone?
1 stone equals 14 pounds. This converter first relates stones to the avoirdupois pound, then to kilograms.
Why do Americans need stones?
British and Irish weight is often given in stones; this converter helps Americans understand those figures.
How do I convert 10 stone to kg?
Multiply 10 by 6.3503. The result is 63.503 kg.
Deep Dive Guide
Stones to Pounds: Convert UK Stone Weight to US Pounds
Convert stones to pounds with the exact factor. 1 stone equals 14 lbs. See the math, UK fitness context, and a quick reference table.
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Last Updated 2026 | This converter was reviewed for accuracy