The conversion
The stone is 14 pounds, and the pound is defined as exactly 0.45359237 kg, which gives us everything we need:
To go from kilograms to stones and pounds: multiply by 2.20462 to get total pounds, divide by 14 for the stones, and the remainder is the pounds. To go back, do the reverse.
Worked examples
Quick reference
- 60 kg ≈ 9 st 6.3 lb
- 65 kg ≈ 10 st 3.3 lb
- 70 kg ≈ 11 st 0.3 lb
- 75 kg ≈ 11 st 11.3 lb
- 80 kg ≈ 12 st 8.4 lb
- 85 kg ≈ 13 st 5.4 lb
- 90 kg ≈ 14 st 2.4 lb
- 100 kg ≈ 15 st 10.5 lb
Why Britain still thinks in stones
The UK went metric decades ago for shops, science and medicine, but body weight never followed. The NHS records you in kilograms; you tell your friends in stones. Gyms, bathroom scales and doctors' letters end up mixing both, which is exactly the moment this converter is for. If you are following a fitness plan written in kilograms or an American one written in pounds, the pounds-only figure bridges all three systems.
Frequently asked questions
How many kilograms are in a stone?
One stone is exactly 6.35029 kg. Going the other way, one kilogram is 0.157473 stone, or about 2.20462 pounds. There are 14 pounds in a stone.
What is 75 kg in stones and pounds?
75 kg is 11 stone 11.3 lb. Multiply 75 by 2.20462 to get 165.3 pounds, divide by 14 to get 11 stone with 11.3 pounds left over.
Why does the UK weigh people in stones?
The stone is an old imperial unit that survived metrication in everyday speech. Medicine and official records in the UK use kilograms, but most Britons still think of body weight in stones and pounds, which is why UK scales offer both.
How do I convert stones and pounds back to kg?
Multiply the stones by 14, add the pounds, then multiply the total pounds by 0.453592. For example 12 st 8 lb is 176 lb, and 176 × 0.453592 = 79.8 kg.
How accurate are the conversions?
The tool uses the exact definitions (1 lb = 0.45359237 kg) and rounds only for display: kilograms to one decimal place and pounds to one decimal place.