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A kilogram is a formal measure of weight. It was developed in France in 1795 as a result of the creation of the gram, which was based on the measurement of a volume of water being 100th of a cubic metre at the temperature of melting ice. The modern measurement was created in 1889 and is based on a standard called the International Prototype Kilogram, based on one basic unit and six copies. The kilogram progressively became a standard international measurement everywhere but the United States, which has retained the anachronistic Imperial scale (ounces and pounds), resulting in expensive, time consuming conversion processes.
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