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Pound (mass) AI simulator
(@Pound (mass)_simulator)
Hub AI
Pound (mass) AI simulator
(@Pound (mass)_simulator)
Pound (mass)
The pound or pound-mass is a unit of mass used in both the British imperial and United States customary systems of measurement. Various definitions have been used; the most common today is the international avoirdupois pound, which is legally defined as exactly 0.45359237 kilograms, and which is divided into 16 avoirdupois ounces. The international standard symbol for the avoirdupois pound is lb; an alternative symbol (when there might otherwise be a risk of confusion with the pound-force) is lbm (for most pound definitions), # (chiefly in the U.S.), and ℔ or ″̶ (specifically for the apothecaries' pound).
The unit is descended from the Roman libra (hence the symbol lb, descended from the scribal abbreviation, ℔). The English word pound comes from the Roman libra pondo ('the weight measured in libra'), and is cognate with, among others, German Pfund, Dutch pond, and Swedish pund. These units are now designated as historical and are no longer in common usage, being replaced by the metric system.
Usage of the unqualified term pound reflects the historical conflation of mass and weight. This accounts for the modern distinguishing terms pound-mass and pound-force.
The word 'pound' and its cognates ultimately derive from a borrowing into Proto-Germanic of the Latin expression libra pondo ('the weight measured in libra'), in which the word pondo is the ablative singular of the Latin noun pondus ('weight').
The United States and the Commonwealth of Nations agreed upon common definitions for the pound and the yard. Since 1 July 1959, the international avoirdupois pound (symbol lb) has been defined as exactly 0.45359237 kg.
In the United Kingdom, the use of the international pound was implemented in the Weights and Measures Act 1963.
The yard or the metre shall be the unit of measurement of length and the pound or the kilogram shall be the unit of measurement of mass by reference to which any measurement involving a measurement of length or mass shall be made in the United Kingdom; and—
— Weights and Measures Act 1963, Section 1(1)
Pound (mass)
The pound or pound-mass is a unit of mass used in both the British imperial and United States customary systems of measurement. Various definitions have been used; the most common today is the international avoirdupois pound, which is legally defined as exactly 0.45359237 kilograms, and which is divided into 16 avoirdupois ounces. The international standard symbol for the avoirdupois pound is lb; an alternative symbol (when there might otherwise be a risk of confusion with the pound-force) is lbm (for most pound definitions), # (chiefly in the U.S.), and ℔ or ″̶ (specifically for the apothecaries' pound).
The unit is descended from the Roman libra (hence the symbol lb, descended from the scribal abbreviation, ℔). The English word pound comes from the Roman libra pondo ('the weight measured in libra'), and is cognate with, among others, German Pfund, Dutch pond, and Swedish pund. These units are now designated as historical and are no longer in common usage, being replaced by the metric system.
Usage of the unqualified term pound reflects the historical conflation of mass and weight. This accounts for the modern distinguishing terms pound-mass and pound-force.
The word 'pound' and its cognates ultimately derive from a borrowing into Proto-Germanic of the Latin expression libra pondo ('the weight measured in libra'), in which the word pondo is the ablative singular of the Latin noun pondus ('weight').
The United States and the Commonwealth of Nations agreed upon common definitions for the pound and the yard. Since 1 July 1959, the international avoirdupois pound (symbol lb) has been defined as exactly 0.45359237 kg.
In the United Kingdom, the use of the international pound was implemented in the Weights and Measures Act 1963.
The yard or the metre shall be the unit of measurement of length and the pound or the kilogram shall be the unit of measurement of mass by reference to which any measurement involving a measurement of length or mass shall be made in the United Kingdom; and—
— Weights and Measures Act 1963, Section 1(1)
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