kilogram
The kilogram is a unit of measurement for mass in the International System of Units (SI)
The kilogram is a unit of measurement for mass in the International System of Units (SI). It is defined as the mass of the International Prototype of the Kilogram (IPK), which is a cylinder made of platinum-iridium alloy preserved at the International Bureau of Weights and Measures (BIPM) in France.
The kilogram is used to measure the amount of matter in an object. It is often used in various scientific and everyday applications, such as weighing objects, determining the mass of ingredients in recipes, or quantifying the amount of product in a package.
In 2019, the International System of Units redefined the kilogram in terms of fundamental constants of nature. It is now defined by setting the Planck constant, a fundamental constant in quantum mechanics, to a fixed value. This new definition ensures the long-term stability and accuracy of the kilogram, as it no longer relies on the physical object of the IPK.
The symbol for kilogram is “kg”. It is important to note that the kilogram is a base unit in the SI system, meaning that other units of mass, such as grams (g) and metric tons (t), are derived units obtained by using different prefixes with the kilogram. For example, 1 kilogram is equal to 1000 grams or 0.001 metric tons.
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