Convert stones to kilograms

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.

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.

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.

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.