Kg to Stone Calculator
Convert kilograms to stones and pounds instantly — or flip it and go stone to kg. Get the result, the formula, and a full reference table for everyday body weight conversions.
Kg ↔ Stone Converter
Convert body weight between kilograms and stones
Enter the body weight in kilograms (kg)
Conversion Result
Kg ↔ Stone weight conversion
Enter a weight value and click Convert to see the result in stones and other units.
Kg to Stone Reference Table
Common kilogram values converted to stone and pounds. Use this table for quick look-ups without running the calculator each time.
| Kilograms | Stone | Stone & Pounds | Pounds (lb) |
|---|---|---|---|
| 40 kg | 6.30 st | 6 st 4 lb | 88.18 lb |
| 50 kg | 7.87 st | 7 st 12 lb | 110.23 lb |
| 60 kg | 9.45 st | 9 st 6 lb | 132.28 lb |
| 70 kg | 11.02 st | 11 st 0 lb | 154.32 lb |
| 75 kg | 11.81 st | 11 st 11 lb | 165.35 lb |
| 80 kg | 12.60 st | 12 st 8 lb | 176.37 lb |
| 90 kg | 14.17 st | 14 st 2 lb | 198.42 lb |
| 100 kg | 15.75 st | 15 st 10 lb | 220.46 lb |
| 110 kg | 17.32 st | 17 st 4 lb | 242.51 lb |
| 120 kg | 18.90 st | 18 st 13 lb | 264.55 lb |
| 140 kg | 22.05 st | 22 st 1 lb | 308.65 lb |
| 150 kg | 23.62 st | 23 st 9 lb | 330.69 lb |
Kg to Stone FAQ
Everything you need to know about converting between kilograms and stones for body weight.
To convert kilograms to stone, divide the weight in kg by 6.35029. Formula: Stone = kg ÷ 6.35029. For example, 70 kg ÷ 6.35029 = 11.02 stone. To get stone and pounds, take the whole number of stone, then multiply the remaining decimal by 14 to get the pounds.
To convert stone to kilograms, multiply the weight in stone by 6.35029. Formula: kg = Stone × 6.35029. For example, 11 stone × 6.35029 = 69.85 kg. If you have stone and pounds, first convert the pounds to a decimal of stone (pounds ÷ 14) before multiplying by 6.35029. Use the toggle above the calculator to switch to Stone → Kg mode.
1 stone is equal to exactly 6.35029318 kg, commonly rounded to 6.35 kg. This is because 1 stone equals 14 pounds, and 1 pound equals 0.45359237 kg, so 14 × 0.45359237 = 6.35029318 kg. This is the exact, internationally agreed conversion factor used by this calculator.
There are exactly 14 pounds (lb) in 1 stone. This is a fixed imperial unit relationship used throughout the UK and Ireland for measuring body weight. So 2 stone = 28 lb, 10 stone = 140 lb, and 20 stone = 280 lb. This relationship never changes regardless of what is being weighed.
The stone has been a traditional British and Irish unit of weight for centuries, historically used for weighing goods, livestock, and people at markets. While most of the world uses kilograms exclusively, the UK and Ireland still commonly use stone (and pounds) specifically for measuring human body weight in everyday conversation, even though kilograms are the official legal metric standard for most other purposes including trade and science.
A quick mental approximation is to divide your weight in kg by 6.35, or roughly divide by 6.3. For an even faster but rougher estimate, divide kg by 6 and subtract a small amount to compensate. For example, 80 kg ÷ 6.35 ≈ 12.6 stone. For precise figures, especially for medical, fitness tracking, or official purposes, always use the exact conversion factor of 6.35029 as this calculator does.
Yes, many UK hospitals, GP surgeries, and gyms still record and discuss patient weight in stone and pounds, even though official NHS records and BMI calculations typically use kilograms internally for accuracy. It remains common for healthcare professionals to convert between the two when discussing weight with patients, since stone remains the more familiar and intuitive unit for most British people when thinking about their own body weight.