It is the Standard International SI (System of Units) unit of mass.
Mass is often specified in smaller units than the kilogram, by changing the power-of-10 prefix multiplier. A mass of one gram (1 g) is 10 -3 kg. A mass of one milligram (1 mg) is 10 -6 kg, or 10 -3 g. A mass of one microgram (1 µg) is 10 -9 kg, or 10 -6 g. It is defined as the mass of a particular international prototype made of platinum-iridium and kept at the International Bureau of Weights and Measures. It was originally defined as the mass of one liter (10 -3 cubic meter) of pure water. The SI base unit for mass is the kilogram. 1 kilogram is equal to 2.20462262185 lb. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between kilograms and pounds. The kilogram or kilogramme, (symbol: kg) is the SI base unit of mass. A gram is defined as one thousandth of a kilogram. Conversion of units describes equivalent units of mass in other systems. At the Earth's surface, a mass of 1 kg weighs approximately 2.20 pounds (lb). Conversely, an object that weighs 1 lb at the Earth's surface has a mass of approximately 0.454 kg. There is a qualitative as well as a quantitative difference between kilograms and pounds. It is defined as the mass of a particular international prototype made of platinum-iridium and kept at the International Bureau of Weights and Measures. It was originally defined as the mass of one liter (10 -3 cubic meter) of pure water. Medical Definition of KILOGRAM. 1. : the base unit of mass in the International System of Units that is equal to the mass of a prototype agreed upon by international convention and that is nearly equal to the mass of 1000 cubic centimeters of water at the temperature of its maximum density. 2. 2. : a unit of force or weight equal to the weight of a kilogram mass under a gravitational attraction equal to that of the earth. See kilogram defined for English-language learners. See kilogram defined for kids. The kilogram (abbreviation, kg) is the Standard International (SI) System of Units unit of mass. It is defined as the mass of a particular international prototype made of platinum-iridium and kept at the International Bureau of Weights and Measures. It was originally defined as the mass of one liter (10 -3 cubic meter) of pure water. Confidence votes 4.9K. One kilogram is 1000 grams. The base unit of mass in the International System, equal to 1,000 grams. 1 cubic decimeter of pure water is 1 liter and weigh 1 kilogram. Scroll down to related links and look at Kilogram The original prototype kilogram, manufactured in 1799 and from which the IPK is derived, had a mass equal to the mass of 1.000025 liters of water at 4 °C. The kilogram is the only SI base unit with an SI prefix (kilo, symbol k) as part of its name. The gram, 1/1000th of a kilogram, was originally defined in 1795 as the mass of one cubic centimeter of water at the melting point of water. Full Definition of KILOGRAM. 1. : the base unit of mass in the International System of Units that is equal to the mass of a prototype agreed upon by international convention and that is nearly equal to the mass of 1000 cubic centimeters of water at the temperature of its maximum density — see metric system table. 2. 2. : a unit of force or weight equal to the weight of a kilogram mass under a gravitational attraction equal to that of the earth. See kilogram defined for English-language learners. See kilogram defined for kids. Description: The kilogram is the base unit of mass in the International (SI) System of Units, and is accepted on a day-to-day basis as a unit of weight (the gravitational force acting on any given object). The kilogram is almost exactly equal to the mass of one litre of water. Definition: The kg is defined as being equal to the mass of the International Prototype of the Kilogram (IPK), a block of platinum-iridium alloy manufactured in 1889 and stored at the International Bureau of Weights and Measures in Sevres, Sèvres. france
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what is a kilogram