Like Kilogram or kg, the pound (lb) and gram (gm) are both used for the measurement of mass. Given below are the detailed history and description of the two units of mass along with their conversions from one to the other.
The imperial system uses the pound as a method of mass measurement and is used as a weighing unit on an everyday basis. Weight is the gravitational force that acts on a given object. The imperial or avoirdupois or the international pound has been officially announced as 453.59237 grams.
The term 'pound' has been adapted from the phrase libra pondo which is a Latin phrase or the Roman libra which stands for pound weight and approximately weighs 329 grams. Hence, the symbol is written as lb which is the abbreviation of the word libra in Latin. The meaning of libra was known to be balance and scales according to the astrological sign. Libra was also known to be the basic unit of weight which was used by the ancient Romans. Throughout the history, the local translation of pound has been used to measure weight in the different countries like France, Scandinavia, United Kingdom, Russia as well as Germany. Although the accurate mass, that has been defined as pound varies from one system to the other. But broadly, they are similar and usually vary between 350-560 metric grams.
Some lesser known facts on Pounds
In the UK the numerous systems which use pound have co-existed. But the avoirdupois pound which is also known to be the wool pound is the commonly used form having the abbreviations of lb, lb avdp or av.
Another variation that is still used to the present is the Troy pound which is approximately 373 gram. This measurement is often used as a form mass measurement usually during the measurement of the mass of the precious metals.
The imperial pound was first defined in terms of the metric unit by The UK Weights and Measures Act of 1878 which defined
1 lb = 453.59237 grams.
The Mendenhall Order in 1893 defined the pound in United States by describing that 1 kg = 2.20462 pounds.
The United States along with the other countries of Commonwealth of Nations together agreed to the definitions of yard and pound and also adopted them in the year 1959.
The gram in the metric system is a unit of mass. It is originally defined to be the:
“Absolute weight of a volume of pure water to the cube of the hundredth part of a meter, and at the temperature of melting ice “.
But in the reversal of reference, along with the defined units, a gram is now defined to be one-thousandth of the S.I. base of the unit, the kilogram or 1 X 10(to the power -3)kg. This itself is now not defined in terms of grams but equal to the mass of any physical prototype of a particular alloy that is kept and preserved by the International Bureau of Weights and Measures.
Some other facts on Gram
The only symbol or unit that is recognized by the International System of Units (S.I.) for gram is “g” following the numeric value along with space. Eg- “640 g” or “640 grams” in English.
The abbreviations for the unit of gram like “gr”, “Gm” or “gm” are not supported by the S.I.
In 1795, The French National Convention adopted the word gramme while revising the metric system and replaced the word gravet which had been introduced in 1793.
The French word gramme was derived from the late-Latin term of “gramma”.
During the 19th century, gram was known to be the fundamental unit of mass in the CGS system of units.
The MKS System of Units co-existed with the CGS system of Units during the 20th century.
In 1960, with the selection of the S.I base units which replaced the MKS System, the fundamental unit of mass was selected to be a kilogram.
Today, most of the measurement of the non-liquid ingredients in cooking and grocery shops throughout the world uses the unit of a gram for the items.
Conversion of Pounds to Gram and vice-versa
The weight units’ factor for the conversion of pounds to grams is 453.59237. For the Troy Pounds, it is 373.2417216.
1 Troy Pound = 373.2417219 g
1 Pound = 453.59237 g
Except for this, today one has different apps and programs at hand through the internet supporting devices that help them with the proper conversion of pounds to the gram and vice versa.