Convert Stones to Kilos

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Enter Stones and pounds here

More information about Stones, Pounds and Kilos

kg =

st -> kg

kg = st * 6.350293
kg = * 6.350293
kg =

st -> lb

lb = ( st * 14.00000 ) + lb
lb = ( * 14.00000 ) + lb
lb = +
lb =

lb -> kg

kg =
kg =
kg =

Stones Information

  • st
Unit of:
  • Weight
Worldwide use:
  • The stone is also used in horse racing to describe the weight that a horse has to carry (not necessarily just the jockey, this weight can also include penalties and suchlike).
  • The stone is still habitually used to express human bodyweight in some sports in the UK and Ireland, such as boxing and wrestling.
  • A British or Irish person will commonly express their weight in stone and pounds (eg. 12 st 6 lbs) instead of purely in pounds as would be the case in the United States (174 lbs).
  • The stone is now used almost exclusively in the UK and Ireland, as a popular - if informal - way of expressing a person's weight. The stone has not been officially recognised as a unit of weight in the UK since 1985.

The stone is a unit of weight in the imperial system used informally in the UK and Ireland, almost exclusively as a measure of body weight. Although sanctioned by the EU for use as a supplementary unit it is essentially obsolete outside the UK and Ireland.


A stone is a unit of weight equal to 14 pounds averdupois (or international lbs). By turn, this makes a stone equivalent to 6.35029kg.


The name 'stone' derives from the practice of using stones as weights, a common practice worldwide for two millennia or more.

The actual unit of the stone was commonly used as a measure of weight for trade purposes across Europe until the 19th century when most countries adopted the metric system, however, the actual weight of the stone varied from country to country, region to region, and even depending on what was being weighed or traded.

In 1389 in England a stone of wool was defined as weighing fourteen pounds, and although a stone of other materials could weigh significantly more or less (in pounds), the stone in general usage became accepted as weighing equal to 14 lbs.

Common references:
  • A 5ft 8in (173cm) tall woman of average build would be expected to weigh between eight and twelve stone.
  • A 6ft 0in (183cm) tall man of average build would normally weigh between ten and thirteen stone.
  • 2 stone = 1 quarter
  • 8 stone = 1 hundredweight
  • 160 stone = 1 long ton

Kilograms Information

  • kg
  • kilo (informal)
Unit of:
  • Mass
  • Weight (in non-scientific affairs)
Worldwide use:
  • Global

The kilogram is the base unit of mass in the International (SI) System of Units, and is accepted on a day-to-day basis as a unit of weight (the gravitational force acting on any given object).

The kilogram is almost exactly equal to the mass of one litre of water.


The kg is defined as being equal to the mass of the International Prototype of the Kilogram (IPK), a block of platinum-iridium alloy manufactured in 1889 and stored at the International Bureau of Weights and Measures in Sèvres, France.

It is the only SI unit that is defined by a physical object rather than a fundamental physical property that can be reproduced in laboratories.


For a short period the grave (also a metallic reference standard) was used to define one thousand grams, until it was replaced by the kilogram in 1799.

In 1795 metric measurement systems were introduced in France and the gram was defined as "the absolute weight of a volume of pure water equal to a cube of one hundredth of a metre, and at the temperature of the melting ice".

The kilogramme (derived from the Greek chilioi [thousand] and gramma [a small weight] was named as a more practical measure of mass for larger quantities in trade, and came to be used as the base unit of mass in all metric measurement systems.

The International (SI) System of Units published in 1960 used the kilogramme as the base unit of mass, and has been adopted by almost every country on earth (with a few notable the exceptions such as the United States).

Common references:
  • A kilogram is the approximate weight of a one litre bottle of soft drink.
  • Sugar is commonly sold in 1kg measures.
  • A typical basketball weighs approximately 1kg.
Usage context:

The kilogram is used globally on a day-to-day basis as a unit of measurement for mass and weight.

It is also the bass unit of mass for all m.k.s. measurement systems, where the metre, the kilogram and the second are used in relation to one another in order to define other concepts, such as the newton for force and the pascal as a measurement of pressure.

Component units:
  • 1kg = 1000g (grams or grammes)
  • 1000kg = 1 metric tonne (US: metric ton)
0 1 2 3 4 5 6 7 8 9 10 11 12 13
1st 1st 1lb 1st 2lb 1st 3lb 1st 4lb 1st 5lb 1st 6lb 1st 7lb 1st 8lb 1st 9lb 1st 10lb 1st 11lb 1st 12lb 1st 13lb
2st 2st 1lb 2st 2lb 2st 3lb 2st 4lb 2st 5lb 2st 6lb 2st 7lb 2st 8lb 2st 9lb 2st 10lb 2st 11lb 2st 12lb 2st 13lb
3st 3st 1lb 3st 2lb 3st 3lb 3st 4lb 3st 5lb 3st 6lb 3st 7lb 3st 8lb 3st 9lb 3st 10lb 3st 11lb 3st 12lb 3st 13lb
4st 4st 1lb 4st 2lb 4st 3lb 4st 4lb 4st 5lb 4st 6lb 4st 7lb 4st 8lb 4st 9lb 4st 10lb 4st 11lb 4st 12lb 4st 13lb
5st 5st 1lb 5st 2lb 5st 3lb 5st 4lb 5st 5lb 5st 6lb 5st 7lb 5st 8lb 5st 9lb 5st 10lb 5st 11lb 5st 12lb 5st 13lb
6st 6st 1lb 6st 2lb 6st 3lb 6st 4lb 6st 5lb 6st 6lb 6st 7lb 6st 8lb 6st 9lb 6st 10lb 6st 11lb 6st 12lb 6st 13lb
7st 7st 1lb 7st 2lb 7st 3lb 7st 4lb 7st 5lb 7st 6lb 7st 7lb 7st 8lb 7st 9lb 7st 10lb 7st 11lb 7st 12lb 7st 13lb
8st 8st 1lb 8st 2lb 8st 3lb 8st 4lb 8st 5lb 8st 6lb 8st 7lb 8st 8lb 8st 9lb 8st 10lb 8st 11lb 8st 12lb 8st 13lb
9st 9st 1lb 9st 2lb 9st 3lb 9st 4lb 9st 5lb 9st 6lb 9st 7lb 9st 8lb 9st 9lb 9st 10lb 9st 11lb 9st 12lb 9st 13lb
10st 10st 1lb 10st 2lb 10st 3lb 10st 4lb 10st 5lb 10st 6lb 10st 7lb 10st 8lb 10st 9lb 10st 10lb 10st 11lb 10st 12lb 10st 13lb
11st 11st 1lb 11st 2lb 11st 3lb 11st 4lb 11st 5lb 11st 6lb 11st 7lb 11st 8lb 11st 9lb 11st 10lb 11st 11lb 11st 12lb 11st 13lb
12st 12st 1lb 12st 2lb 12st 3lb 12st 4lb 12st 5lb 12st 6lb 12st 7lb 12st 8lb 12st 9lb 12st 10lb 12st 11lb 12st 12lb 12st 13lb
13st 13st 1lb 13st 2lb 13st 3lb 13st 4lb 13st 5lb 13st 6lb 13st 7lb 13st 8lb 13st 9lb 13st 10lb 13st 11lb 13st 12lb 13st 13lb
14st 14st 1lb 14st 2lb 14st 3lb 14st 4lb 14st 5lb 14st 6lb 14st 7lb 14st 8lb 14st 9lb 14st 10lb 14st 11lb 14st 12lb 14st 13lb
15st 15st 1lb 15st 2lb 15st 3lb 15st 4lb 15st 5lb 15st 6lb 15st 7lb 15st 8lb 15st 9lb 15st 10lb 15st 11lb 15st 12lb 15st 13lb
16st 16st 1lb 16st 2lb 16st 3lb 16st 4lb 16st 5lb 16st 6lb 16st 7lb 16st 8lb 16st 9lb 16st 10lb 16st 11lb 16st 12lb 16st 13lb
17st 17st 1lb 17st 2lb 17st 3lb 17st 4lb 17st 5lb 17st 6lb 17st 7lb 17st 8lb 17st 9lb 17st 10lb 17st 11lb 17st 12lb 17st 13lb
18st 18st 1lb 18st 2lb 18st 3lb 18st 4lb 18st 5lb 18st 6lb 18st 7lb 18st 8lb 18st 9lb 18st 10lb 18st 11lb 18st 12lb 18st 13lb
19st 19st 1lb 19st 2lb 19st 3lb 19st 4lb 19st 5lb 19st 6lb 19st 7lb 19st 8lb 19st 9lb 19st 10lb 19st 11lb 19st 12lb 19st 13lb
20st 20st 1lb 20st 2lb 20st 3lb 20st 4lb 20st 5lb 20st 6lb 20st 7lb 20st 8lb 20st 9lb 20st 10lb 20st 11lb 20st 12lb 20st 13lb