Convert Kilograms to Stones Instantly
Need to convert kilograms to stones? Enter your weight in kilograms into the calculator below for an instant result.
1 kilogram = 0.1574730444 stone, while 1 stone = 6.35029318 kilograms. To calculate the conversion manually, divide the number of kilograms by 6.35029318.
For example, 70 kg = 11.0231 st, which is approximately 11 stone and 0.32 pounds.
Use the calculator below for a more precise result.
How to Convert Kilograms to Stones
To convert kilograms to stones, divide the weight in kilograms by 6.35029318.
The formula is:
stones = kilograms ÷ 6.35029318
You can also use the equivalent multiplication formula:
stones = kilograms × 0.1574730444
For most everyday calculations, a result rounded to two decimal places is sufficient. The calculator above keeps additional precision before displaying the result.
Example: Convert 70 kg to stones
Suppose you want to convert 70 kilograms:
70 ÷ 6.35029318 = 11.0231 st
So:
70 kg ≈ 11.02 stone
However, in everyday British usage, body weight is often expressed as whole stones plus the remaining pounds rather than as a decimal number of stones.
In this format:
70 kg ≈ 11 st 0.32 lb
Example: Convert 80 kg to stones
80 ÷ 6.35029318 = 12.5978 st
Therefore:
80 kg ≈ 12.60 stone
Expressed as stones and pounds:
80 kg ≈ 12 st 8.37 lb
Example: Convert 100 kg to stones
100 ÷ 6.35029318 = 15.7473 st
Therefore:
100 kg ≈ 15.75 stone
Or, using the traditional stones-and-pounds format:
100 kg ≈ 15 st 10.46 lb
What Is the Exact Kilogram to Stone Conversion?
The relationship between kilograms, pounds and stones gives us the conversion factor used by this calculator.
One stone contains exactly 14 avoirdupois pounds. One international avoirdupois pound is 0.45359237 kilograms.
Therefore:
14 × 0.45359237 = 6.35029318 kg
This gives:
1 stone = 6.35029318 kg
and:
1 kg = 0.1574730444 st
Using the full conversion factor rather than simply dividing by 6.35 reduces unnecessary rounding error, especially when converting larger values or when more decimal precision is required.
The stone-to-pound relationship is documented in established measurement references including NIST conversion tables, while the kilogram is the SI base unit of mass maintained within the International System of Units.
Decimal Stones vs Stones and Pounds
There are two common ways to display the result when you convert kilograms to stones.
A calculator may give a decimal answer such as:
75 kg = 11.8105 st
This is mathematically convenient, but it is not always how a person’s weight would normally be expressed in conversation.
Because one stone contains 14 pounds, the decimal portion can be converted into pounds.
For 75 kg:
75 kg = 11.8105 st
Take the decimal part:
0.8105 × 14 = 11.35 lb
So the same weight can be written as:
75 kg ≈ 11 st 11.35 lb
This distinction is useful when comparing a metric scale reading with a British-style weight measurement.
What Is a Kilogram?
The kilogram (kg) is the SI base unit of mass and is used throughout most of the world.
Kilograms are commonly used for:
- body weight and fitness measurements;
- food and product packaging;
- luggage allowances;
- shipping and logistics;
- science and education;
- medical and health records;
- international measurement and trade.
One kilogram contains exactly 1,000 grams.
Although people frequently use the words mass and weight interchangeably in everyday conversation, the kilogram is technically a unit of mass.
What Is a Stone?
The stone, abbreviated st, is a traditional unit of mass equal to 14 pounds.
It is particularly familiar in the United Kingdom and Ireland, especially when discussing a person’s body weight.
For example, someone might describe their weight as:
12 stone 5 pounds
rather than:
173 pounds
or approximately:
78.5 kilograms
The stone is not part of the International System of Units, so people outside countries where it remains familiar may rarely encounter it.
Why Convert Kilograms to Stones?
You may need to convert kilograms to stones when information comes from two different measurement traditions.
One of the most common situations is body weight. Digital scales, fitness applications, sports data and medical records may display kilograms, while a person in the UK or Ireland may be more familiar with stones and pounds.
The conversion can therefore be useful when:
- comparing body-weight measurements from different countries;
- reading UK fitness or lifestyle information;
- discussing weight with someone who normally uses stones;
- interpreting an international health or fitness record;
- travelling or moving between countries that use different units;
- changing the display units on a scale, app or fitness tracker.
It can also help prevent a common mistake: confusing decimal stones with stones and pounds.
For example, 10.5 stone does not mean 10 stone 5 pounds. Half a stone equals 7 pounds, so:
10.5 st = 10 st 7 lb
When Is This Conversion Most Commonly Used?
Kilograms are standard across much of Europe and many other parts of the world, while stones continue to be familiar for personal body weight in the UK and Ireland.
This makes kilogram-to-stone conversion particularly useful for fitness, sport, personal weight tracking and international communication.
A person may, for example, use a gym scale that reports 82 kg but prefer to understand that figure in the traditional stone-and-pound format.
Using the calculation above:
82 kg ≈ 12.91 st ≈ 12 st 12.79 lb
The conversion does not change the underlying measurement; it simply expresses the same mass using a different unit.
How Accurate Is the Kilograms to Stones Calculator?
The calculator uses:
1 stone = 6.35029318 kg
rather than the shortened approximation of 6.35 kg.
Results are calculated using the more precise factor and then rounded only for display.
This matters because repeatedly using rounded conversion factors can introduce small differences.
For everyday body-weight comparisons, two decimal places in stones or pounds are normally more than enough. If you are working in a professional, scientific or regulated setting, retain additional precision and follow the measurement requirements that apply to your field.
For more information about how conversions, rounding and reference standards are handled on this website, see our Accuracy & Editorial Policy.
Common Kilogram to Stone Conversion Mistakes
One frequent error is dividing by 14. Fourteen is the number of pounds in one stone, not the number of kilograms.
Another mistake is treating the decimal part of a stone as pounds. For example:
11.5 st = 11 st 7 lb
not 11 stone 5 pounds.
It is also better not to round the conversion factor too early. Dividing by 6.35029318 provides a more accurate calculation than using 6.3 or another heavily rounded number.
Finally, make sure the conversion direction is correct. To change kilograms into stones, divide kilograms by 6.35029318. To convert stones back into kilograms, multiply stones by 6.35029318.
Kilograms to Stones Conversion Table
The following table provides common values from 1 kg to 100 kg. Decimal stone values are rounded to four decimal places, while the stones-and-pounds column shows how the same result can be expressed in the format commonly used for body weight.
| Kilograms | Stones | Stones and pounds |
|---|---|---|
| 1 kg | 0.1575 st | 0 st 2.20 lb |
| 10 kg | 1.5747 st | 1 st 8.05 lb |
| 20 kg | 3.1495 st | 3 st 2.09 lb |
| 30 kg | 4.7242 st | 4 st 10.14 lb |
| 40 kg | 6.2989 st | 6 st 4.18 lb |
| 50 kg | 7.8737 st | 7 st 12.23 lb |
| 60 kg | 9.4484 st | 9 st 6.28 lb |
| 70 kg | 11.0231 st | 11 st 0.32 lb |
| 80 kg | 12.5978 st | 12 st 8.37 lb |
| 90 kg | 14.1726 st | 14 st 2.42 lb |
| 100 kg | 15.7473 st | 15 st 10.46 lb |
For values not shown in the table, use the calculator at the top of the page.
Related Weight Converters
If you are working with body-weight units, you may also find these conversions useful:
- Stones to Kilograms – reverse this conversion.
- Kilograms to Pounds – convert metric body weight directly to pounds.
- Pounds to Stones – convert pounds into stones.
- Stones to Pounds – convert stones into pounds.
- Weight Converters – browse all available weight and mass conversions.
Accurate and Practical Weight Conversion
When you convert kilograms to stones, the essential relationship is simple:
stones = kilograms ÷ 6.35029318
The calculator gives you both decimal stones and the familiar stones-and-pounds format, while the examples and table make common values easy to check.
For the most accurate result, enter your exact kilogram value into the calculator rather than relying on a rounded conversion factor.
Frequently Asked Questions
One kilogram equals approximately 0.1574730444 stone.
Therefore, to convert kilograms to stones, multiply kilograms by 0.1574730444 or divide by 6.35029318.
One stone equals 6.35029318 kilograms.
A commonly rounded value is 6.35 kg, but the calculator on this page uses the more precise conversion factor.
There are exactly 14 pounds in one stone.
This relationship is also useful when converting a decimal stone result into the traditional stones-and-pounds format.
70 kg = approximately 11.0231 stone.
Expressed in stones and pounds, this is approximately:
11 st 0.32 lb
For everyday conversation, this may simply be described as about 11 stone.
80 kg ≈ 12.5978 st
or approximately:
12 st 8.37 lb
100 kg ≈ 15.7473 st
which is approximately:
15 st 10.46 lb
The stone is a traditional British unit and remains familiar in everyday discussions of personal body weight in the UK and Ireland.
Kilograms, however, are part of the SI metric system and are widely used internationally. This is why converting between the two units is still useful.
No.
A stone and a pound are different units:
1 stone = 14 pounds
For example:
10 stone = 140 pounds
It depends on your purpose.
Decimal stones are convenient for calculations and comparing precise values. Stones and pounds are often easier to understand in everyday UK-style body-weight measurements.
The calculator above provides both formats.
