Convert kilograms to stones and pounds for UK weight measurements. Enter any value and get instant results in both directions.
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Weight in Stones
0 st
Pure stone value
Stones & Pounds (UK Format)
0 st 0 lbs
UK standard weight format
Kilograms
0 kg
Metric weight
📝 Step-by-Step Conversion
Real-World Weight Conversion Examples
🏋️ Average Adult Weight
A person weighing 70 kg wants to know their weight in stones.
Calculation: 70 × 0.157473 = 11.02 stones
UK Format: 11 st 0.32 lbs (11 stones and 0.32 pounds)
📦 Luggage Weight
A suitcase weighs 23 kg — the typical airline checked luggage limit.
Calculation: 23 × 0.157473 = 3.62 stones
UK Format: 3 st 8.69 lbs (3 stones and 8.69 pounds)
🧒 Child's Weight
A child weighs 15 kg.
Calculation: 15 × 0.157473 = 2.36 stones
UK Format: 2 st 5.07 lbs (2 stones and 5.07 pounds)
🔄 Reverse: Stones to Kilograms
A person weighs 12 stones and wants to know their weight in kilograms.
Calculation: 12 ÷ 0.157473 = 76.20 kg
Detailed: 12 st 0 lbs = 76.20 kg
Understanding Stones and Kilograms
The stone (abbreviated as st) is a unit of weight used primarily in the United Kingdom and Ireland for measuring body weight. One stone is equal to 14 pounds or approximately 6.35 kilograms. The kilogram (kg) is the base unit of mass in the metric system, used worldwide for most weight measurements.
Stones = Kilograms × 0.157473
To convert kilograms to stones, multiply by 0.157473
Kilograms = Stones ÷ 0.157473
To convert stones back to kilograms, divide by 0.157473
Our kilogram to stone converter makes it easy to switch between metric and imperial weight measurements. Simply type any weight in kilograms into the input field, and you'll instantly see the equivalent in stones, as well as the traditional UK format of stones and pounds. You can also enter a value in stones to convert back to kilograms — the conversion works both ways.
The stone is a traditional British unit of weight that's still widely used in the UK and Ireland for measuring body weight. While most of the world uses kilograms, understanding stone measurements is essential for interpreting UK medical records, fitness goals, and everyday conversations about weight. Our converter bridges this gap with precise, instant calculations.
Why Use Stones?
The stone remains the standard unit for body weight measurement in the United Kingdom. Doctor's visits, gym memberships, and personal weight tracking all commonly use stones and pounds. If you're moving to the UK, working with UK health data, or simply curious about your weight in imperial units, this converter provides the accurate results you need.
Frequently Asked Questions
How many kilograms are in a stone?
One stone is equal to approximately 6.35029 kilograms. More precisely, since 1 stone = 14 pounds and 1 pound = 0.45359237 kg, the exact conversion is 14 × 0.45359237 = 6.35029318 kg. For quick mental math, you can use 6.35 kg per stone as a close approximation.
What is the formula to convert kg to stones?
To convert kilograms to stones, multiply the kilogram value by 0.157473. For example, 70 kg × 0.157473 = 11.02 stones. To express this in the UK format of stones and pounds, take the whole number (11 stones) and multiply the decimal remainder (0.02) by 14 to get pounds (0.32 lbs), giving you 11 st 0.32 lbs.
How do I convert stones back to kilograms?
To convert stones to kilograms, multiply the stone value by 6.35029. For example, 12 stones × 6.35029 = 76.20 kg. If you have stones and pounds, first convert the pounds to stones by dividing by 14, add that to the stone value, then multiply by 6.35029. Our converter does all of this automatically.
Why does the UK use stones instead of kilograms?
The UK officially uses the metric system (kilograms) for most measurements, but the stone remains in widespread popular use for body weight due to tradition and cultural familiarity. Many people find that stones offer a more intuitive scale for human body weight — most adults fall between 8 and 16 stones — making it easier to estimate and discuss weight without large numbers.
What is the difference between a stone and a pound?
A stone (st) is equal to 14 pounds (lbs). The pound is the smaller unit — 1 lb = 0.0714286 stones. When expressing weight in the UK format, weights are typically given as whole stones followed by remaining pounds (e.g., 11 st 4 lbs rather than 11.29 stones). This is analogous to expressing height in feet and inches rather than decimal feet.
Is the stone used anywhere outside the UK?
The stone is primarily used in the United Kingdom and Ireland for measuring body weight. It is also sometimes used in Commonwealth countries like Australia, New Zealand, and Canada, though kilograms are more common there today. The United States does not use the stone — Americans measure weight in pounds alone. In most other countries worldwide, kilograms are the standard unit for weight measurement.