Average adult
Input: 70 kg
Output: 11 st 0.32 lb
70 ÷ 6.35029318 = 11.023 st → 11 st + 0.023 × 14 = 0.32 lb.
kg to stone converter
Enter a body weight in kilograms to get stone and pounds, as used in the UK and Ireland.
Stone & pounds:
Formula and algorithm
- total stone = kilograms ÷ 6.35029318
- stone = whole part; pounds = decimal part × 14
- Constant used: 1 stone = 14 pounds = 6.35029318 kilograms (exact).
Worked examples
Heavier adult
Input: 80 kg
Output: 12 st 8.37 lb
80 ÷ 6.35029318 = 12.598 st → 12 st 8.37 lb.
Lighter adult
Input: 63.5 kg
Output: 9 st 13.99 lb
63.5 ÷ 6.35029318 = 9.999 st → 9 st 13.99 lb.
FAQ
What is 70 kg in stone?
70 kg is about 11 stone 0.32 pounds (11.02 stone).
How many pounds in a stone?
Exactly 14 pounds make one stone.
How is the pounds part found?
Multiply the decimal part of the total stone by 14. For 11.023 stone, 0.023 × 14 ≈ 0.32 lb.
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Updated: June 7, 2026