Stone to Kilo Calculator
Convert between stones (st) and kilograms (kg) instantly. Perfect for body weight tracking, sports, and everyday use in the UK and Ireland. Enter a value in either unit to get the equivalent weight.
What Is a Stone (st)?
A stone (st) is a unit of weight in the imperial system, primarily used in the United Kingdom and Ireland for measuring body weight. One stone is equal to 14 pounds (lb) or approximately 6.35029318 kilograms (kg). The stone was historically used throughout Europe but is now mostly associated with British and Irish weight measurement.
A kilogram (kg) is the base unit of mass in the International System of Units (SI). It is defined by the Planck constant and is the standard unit for weight and mass in most of the world. One kilogram is approximately 0.157473044 stones.
How Does the Stone to Kilo Calculator Work?
The calculator uses the exact conversion factors:
1 stone = 6.35029318 kg
1 kg = 0.157473044 stones
These conversion factors are based on the definition of the stone as exactly 14 pounds, and the pound as exactly 0.45359237 kg. Therefore, 1 stone = 14 × 0.45359237 = 6.35029318 kg.
Simply enter a value in either stones or kilograms, select the direction of conversion, and the calculator will instantly compute the equivalent weight.
Why Use This Stone to Kilo Calculator?
- Two-Way Conversion: Convert from stones to kg and from kg to stones.
- Precise Results: Uses the exact conversion factor (6.35029318).
- Body Weight Focus: Ideal for tracking weight in the UK and Ireland.
- Reference Table: Quick reference for common weight values.
- Free & Private: No registration, no data storage.
Common Weight Equivalents
- 1 stone = 6.35 kg = 14 lb
- 2 stones = 12.70 kg = 28 lb
- 5 stones = 31.75 kg = 70 lb
- 10 stones = 63.50 kg = 140 lb
- 12 stones = 76.20 kg = 168 lb
- 14 stones = 88.90 kg = 196 lb
- 16 stones = 101.60 kg = 224 lb
❓ Stone to Kilo Calculator FAQ
What is a stone (st)?
A stone is a unit of weight in the imperial system, equal to 14 pounds (lb) or approximately 6.35 kilograms. It is primarily used in the UK and Ireland for measuring body weight.
How many kilograms are in a stone?
1 stone = 6.35029318 kilograms (kg).
How many stones are in a kilogram?
1 kilogram = 0.157473044 stones.
What is the formula for converting stones to kilograms?
kg = stones × 6.35029318. For example, 10 stones × 6.35029318 = 63.5029318 kg.
What is the formula for converting kilograms to stones?
stones = kg × 0.157473044. For example, 100 kg × 0.157473044 = 15.7473044 stones.
Why is the stone used for body weight in the UK?
The stone is a traditional imperial unit that has been used for centuries in Britain. Many people in the UK and Ireland still prefer to measure their body weight in stones and pounds rather than kilograms.
What is the difference between a stone and a pound?
A stone is equal to 14 pounds. A pound is a smaller unit of weight. For example, 10 stones = 140 pounds.
How do I convert stones and pounds to kilograms?
First convert stones to pounds (stones × 14), add the pounds, then multiply by 0.45359237 to get kilograms. For example, 10 stone 5 lb = (10 × 14 + 5) × 0.45359237 = 145 × 0.45359237 = 65.77 kg.
How do I convert kilograms to stones and pounds?
Divide kilograms by 6.35029318 to get stones. Multiply the decimal remainder by 14 to get pounds. For example, 70 kg ÷ 6.35029318 = 11.023 stones. 0.023 × 14 = 0.32 lb, so approximately 11 stone 0 lb.
Is the stone used anywhere else besides the UK?
The stone is primarily used in the UK and Ireland. It is sometimes used in other Commonwealth countries, but kilograms are the standard in most places.
What is the symbol for stone?
The symbol for stone is st.
What is the symbol for kilogram?
The symbol for kilogram is kg.
How accurate is this converter?
This converter uses the exact conversion factor (6.35029318) and provides results with customizable decimal precision, making it suitable for all practical purposes.
Can I use this calculator for weight loss tracking?
Yes. This calculator is ideal for tracking weight loss progress, especially if you prefer to measure your weight in stones and want to convert to kilograms for fitness apps or medical records.
What is the average body weight in stones?
The average body weight varies by country. In the UK, the average adult weight is approximately 11-12 stone for men and 9-10 stone for women. These values vary significantly with height, age, and other factors.
Is the stone an SI unit?
No, the stone is not an SI unit. It is an imperial unit that is still used in some Commonwealth countries. The SI unit for mass is the kilogram.
How do I convert 12 stone to kg?
12 stones × 6.35029318 = 76.20351816 kg.
How do I convert 80 kg to stones?
80 kg × 0.157473044 = 12.59784352 stones, which is approximately 12 stone 8 lb.