What is the Kilograms to Stone Converter?
The stone (st) is a unit of mass used mainly in the United Kingdom and Ireland for body weight. One stone equals exactly 6.35029 kilograms (14 pounds). This converter takes any weight in kilograms and gives you the equivalent in stone, plus a familiar stone-and-pounds breakdown.
How to use it
Enter your weight in kilograms and the result updates instantly. The main figure shows the decimal stone value, while the table below splits it into whole stone and the remaining pounds — the way weights are commonly quoted on bathroom scales and at the doctor's office.
The formula explained
The conversion is a simple division: $$\text{stone} = \frac{\text{kilograms}}{6.35029}$$ Because there are 14 pounds in a stone, the fractional part of the stone result is multiplied by 14 to find the leftover pounds: $$\text{pounds} = (\text{stone} - \text{whole stone}) \times 14$$
Worked example
Suppose you weigh 80 kg. Dividing by 6.35029 gives 12.5979 stone. The whole-stone part is 12, and the remaining \(0.5979 \text{ stone} \times 14 \approx 8.37\) pounds — so 80 kg is about 12 st 8.4 lb.
FAQ
How many kilograms are in one stone? Exactly 6.35029 kg, which is also 14 pounds.
Is the stone an SI unit? No. It is an Imperial unit; the SI unit of mass is the kilogram. The stone remains popular for personal body-weight measurement in the UK and Ireland.
How do I convert stone back to kilograms? Multiply the number of stone by 6.35029.
