A British television programme
In weight-loss programmes and reality shows the weights come only in stones. “Fifteen stone” is 95.25 kilograms, and “twenty stone” is 127 kilograms.
Convert stones to kilograms
One stone is 6.35 kilograms, or 14 pounds. Type a value in stones and the result appears straight away. The field accepts fractions, so the notation 11 st 4 lb goes in as 11 4/14.
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How many kilograms are in a stone?
One stone is 6.35029318 kilograms, which is 14 pounds.[1] The formula reads kilograms = stones × 6.35029318.
This direction comes in useful when the value reaches you from a British source: from a conversation, a television programme, a forum, or an app that counts progress in stones.
Where the unit came from, why it has fourteen pounds and which countries still use it are covered on the kilograms to stones converter page.
How to type “11 st 4 lb” into the converter
A British weight is given in two units at once, while the converter takes a single number. One property of the field joins them: it accepts fractions, and pounds are fourteenths of a stone.
So you type the notation 11 st 4 lb as 11 4/14 and get 71.67 kilograms. In the same way 10 st 7 lb is 10 7/14, and 12 st 10 lb is 12 10/14.
The second route runs through a decimal: divide the pounds by 14 and add them to the whole stones. Four pounds give 0.29 stone, so 11 st 4 lb is 11.29 stone. The result comes out the same.
This helps most with weights from British paperwork, where a remainder in pounds turns up at almost every value. The full notation table below gives ready results for the usual remainders.
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How much is half a stone?
Half a stone is 7 pounds, which comes to 3.18 kilograms. British slimming clubs set weekly and monthly targets in this unit, so it keeps coming back on forums and in apps from the UK.
The steps go up half a stone at a time: one stone is 6.35 kilograms, one and a half is 9.53, and two stone is 12.70. A target given as “two stone” therefore means just under thirteen kilograms.
In your head it goes like this: multiply the stones by six and add about five percent. For 12 stone that gives 72 plus 3.6, so 75.6 kilograms against an exact 76.20. For a conversation that much accuracy is enough.
The opposite direction, from kilograms to stones, is worked out in the kilograms to stones converter.
Stones or pounds: where your figure came from
The answer depends on the country the value arrived from. The United Kingdom and Ireland give body weight in stones with pounds, so there you hear “eleven stone four”.
The United States counts in pounds alone, also within the imperial system. An American gives “158 pounds”, and a British speaker gives the same weight as “11 stone 4”. You can recognise the source by how many units the notation holds.
A value given in pounds alone converts in the pounds to kilograms converter, and your own weight goes into pounds in the kilograms to pounds converter.
Australia, Canada and New Zealand work in kilograms, so material from there reaches you already in the metric system.
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Stones to kilograms conversion table
Whole stones from 6 to 22, a range covering body weights from a child to a heavy adult. The values that come up most often in conversation are highlighted.
| Stones | Kilograms |
|---|---|
| 6 st | 38.1 kg |
| 7 st | 44.45 kg |
| 8 st | 50.8 kg |
| 9 st | 57.15 kg |
| 10 st | 63.5 kg |
| 11 st | 69.85 kg |
| Stones | Kilograms |
|---|---|
| 12 st | 76.2 kg |
| 13 st | 82.55 kg |
| 14 st | 88.9 kg |
| 15 st | 95.25 kg |
| 16 st | 101.6 kg |
| 17 st | 107.95 kg |
| Stones | Kilograms |
|---|---|
| 18 st | 114.31 kg |
| 19 st | 120.66 kg |
| 20 st | 127.01 kg |
| 21 st | 133.36 kg |
| 22 st | 139.71 kg |
Have a weight in kilograms? Go to the kilograms to stones converter, where you will find a table of the British notation.
The full stones and pounds notation in kilograms
The notation a British speaker gives their weight in, converted straight into kilograms. The table covers the usual remainders: exact stones plus 4, 7 and 10 pounds, where 7 pounds is precisely half a stone.
| Weight | Kilograms |
|---|---|
| 8 st 0 lb | 50.8 kg |
| 8 st 4 lb | 52.62 kg |
| 8 st 7 lb | 53.98 kg |
| 8 st 10 lb | 55.34 kg |
| 9 st 0 lb | 57.15 kg |
| 9 st 4 lb | 58.97 kg |
| 9 st 7 lb | 60.33 kg |
| 9 st 10 lb | 61.69 kg |
| 10 st 0 lb | 63.5 kg |
| 10 st 4 lb | 65.32 kg |
| 10 st 7 lb | 66.68 kg |
| 10 st 10 lb | 68.04 kg |
| Weight | Kilograms |
|---|---|
| 11 st 0 lb | 69.85 kg |
| 11 st 4 lb | 71.67 kg |
| 11 st 7 lb | 73.03 kg |
| 11 st 10 lb | 74.39 kg |
| 12 st 0 lb | 76.2 kg |
| 12 st 4 lb | 78.02 kg |
| 12 st 7 lb | 79.38 kg |
| 12 st 10 lb | 80.74 kg |
| 13 st 0 lb | 82.55 kg |
| 13 st 4 lb | 84.37 kg |
| 13 st 7 lb | 85.73 kg |
| 13 st 10 lb | 87.09 kg |
| Weight | Kilograms |
|---|---|
| 14 st 0 lb | 88.9 kg |
| 14 st 4 lb | 90.72 kg |
| 14 st 7 lb | 92.08 kg |
| 14 st 10 lb | 93.44 kg |
| 15 st 0 lb | 95.25 kg |
| 15 st 4 lb | 97.07 kg |
| 15 st 7 lb | 98.43 kg |
| 15 st 10 lb | 99.79 kg |
| 16 st 0 lb | 101.6 kg |
| 16 st 4 lb | 103.42 kg |
| 16 st 7 lb | 104.78 kg |
| 16 st 10 lb | 106.14 kg |
In the converter above, the same notation goes in as a fraction: 11 st 4 lb is 11 4/14, and 12 st 7 lb is 12 7/14.
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When do you need to convert stones to kilograms?
Four situations in which a British weight reaches you from the outside.
A target from a British slimming club
Targets come in stones and half-stones. Half a stone is 3.18 kilograms, and two stone is 12.7 kilograms. Half a stone equals exactly 7 pounds.A weight given by someone from the UK
Asked about weight you will hear “ten stone seven” or “eleven four”. The first is 10 st 7 lb, which is 66.68 kilograms, the second 11 st 4 lb, which is 71.67 kilograms.A medical document from the United Kingdom
A hospital discharge letter or a patient record will give weight in stones and pounds. If the document holds pounds alone, use the pounds to kilograms converter.
Convert other units to Kilograms
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Sources
- Stone (unit) — Wikipedia
Every figure in the tables was computed from the unit definitions and checked arithmetically before publication. Historical values and the names of local units come from the sources listed above.
Content last reviewed: · written and checked by the Arteon team
Frequently asked questions about converting stones to kilograms
How many kilograms are in 1 stone?
One stone is 6.35029318 kilograms, 6.35 kg rounded. A stone is 14 pounds, and a pound is 0.45359237 kilograms.
How many kilograms is 10 stone?
Ten stone is 63.50 kilograms. The arithmetic: 10 × 6.35029318.
How many kilograms is 11 stone?
Eleven stone is 69.85 kilograms, which is practically 70 kilograms. The difference comes to 150 grams.
How many kilograms is 12 stone?
Twelve stone is 76.20 kilograms. Thirteen stone gives 82.55 kilograms, and fourteen gives 88.90.
What is 10 stone 4 lb in kilograms?
10 st 4 lb is 65.32 kilograms. You type it into the converter as 10 4/14, because pounds are fourteenths of a stone.
How do I enter stones and pounds into the converter?
Enter them as a mixed fraction with 14 as the denominator. The notation 11 st 4 lb goes in as 11 4/14, and 12 st 10 lb as 12 10/14.
How many kilograms is half a stone?
Half a stone is 7 pounds, which is 3.18 kilograms. It is the standard target in British slimming programmes.
How many pounds are in a stone?
A stone is exactly 14 pounds. That is why the pounds in a weight go no higher than thirteen.
What is the formula for converting stones to kilograms?
The formula is: kilograms = stones × 6.35029318. The other way round: stones = kilograms ÷ 6.35029318.
How do I convert stones to kilograms in my head?
Multiply the stones by six and add about five percent of the result. For 12 stone that gives 72 plus 3.6, so 75.6 against an exact 76.20 kilograms.
Is 11 stone 70 kg?
Practically, yes. Eleven stone is 69.85 kilograms, so 150 grams separate it from a round 70 kilograms.
Which countries give weight in stones?
The United Kingdom and Ireland, only for body weight. The United States works in pounds alone, and Australia, Canada and New Zealand moved to kilograms.
What does the notation “eleven four” mean?
It is the spoken short form of 11 st 4 lb, meaning eleven stones and four pounds, which converts to 71.67 kilograms. The word stone is often left out in speech.
Does stone take a plural?
In a body weight the unit stays in the form stone whatever the number, so people say “eleven stone”. The form stones turns up in other contexts, for instance with the weight of goods.
Have a question or a suggestion?
If you have spotted an error in the tables or have an idea for improving the converter, drop us a line. We reply to every message.
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