How much kg in pound, ounce and spool is the history of the matter

To clarify the question of how many kilograms in a pound, and also, whence the name “pound” in general, we have to go to ancient Rome.

In Rome, two names were used to denotesmall weight. The word libra was used to denote the mass of precious metals and already minted coins. The weight of the remaining substances was measured in pounds. Let us take a closer look at each of the notation and find out how many pounds per kilogram, grams and ounces.

Perhaps most of us have the first association.with the word "pound" will be "pound sterling." Obviously, the answer to the question "how many kg in one pound" we can hardly find here, but it is this expression that we see in everyday life most often, and unfairly deprive it of attention.

The pound sterling is still cashthe unit of Great Britain, some of its former colonies is denoted by the Latin letter L. It is easy to guess that this is so, because the name comes from the Latin name for the measure of weight "libra". As already mentioned, in the Roman Empire, the libra was used to denote weights, mainly precious metals. Libra was equal to 327.45 grams and consisted of 12 ounces, each of which, in turn, was approximately 27 grams.

Ounces are still running.They range from 28 (fluid ounces) to 31 grams - this is the so-called "troy ounce." The latter is used by jewelers and bankers. Fluid ounces are still in demand among pharmacists and food manufacturers.

The pound sterling originally constituted one pure silver silver coin.

Then, with the development of the monetary system, appearedbanknotes and coins not related to the mass of silver used to make them. The memory of the Roman original source remained perhaps only as a designation - the Latin letter L.

In Russia, a spool was tied to the lib.Probably everyone heard the saying about the fact that the spool is small, but expensive. Indeed, the spool was small and was about 4 grams of gold or 1/96 libra. So called and a small gold coin of Kievan Rus.

Pound is another Roman measure of weight used to determine the mass of all other substances. And the answer to the question "how many kg in a pound" should be addressed to her.

In Rome, the pound, like the libra, was 327 grams.But in medieval Europe in every more or less significant area sovereign gentlemen had the right to set the value of the pound at its own discretion. And it should be noted that they actively used this right, extracting from the answer to the question "how many kg in a pound" the maximum benefit for themselves.

In Europe at the end of the eighteenth century existedat least 100 different pounds. Their values ​​are quite different among themselves. For example, the Austrian pound was equal to 560 grams, and the Spanish - 450. The French pound, called "livre", was equal to 490 grams and also originally, like the British pound, was used to denote the measure of weight of silver coins. In Russia, the pound was equal to 409 grams, and its standard was created by D.I. Mendeleev.

Obviously, such a variety of symbols for weight measures created a lot of inconvenience. Therefore, the metric system, with its kilograms and grams, was an excellent way out of the situation.

But it would be unfair to forget the pound. Therefore, now, after the adoption of the metric system, you can quite accurately say how many kg in a pound. Today, the pound defaults to 500 grams.