Metric Unit Abbreviations Metric weight units use the standard SI prefixes in the vast majority of cases, there are a couple of non-standard metric weight units, the metric ton and the carat which also have abbreviations. While length, weight and volume cover the basics, there are other units of measurements that are just as important. To quickly convert between systems of measurement, use the Celsius to Fahrenheit converter on our sister site LoveToKnow.com. Add prefixes as you did above for meters and liters. kilogram (kg) hectogram (hg) dekagram (dag) gram (g) decigram (dg) centigram (cg) milligram (mg) 1,000 grams. Note that rounding errors may occur, so always check the results. The kilogram is almost exactly equal to the mass of one . [Note 8]. Both of these symbols are in k orrect because the capital letter K is used. Metric System 36 Terms. To circumvent this difficulty, a third set of units was introduced: the so-called practical units. At the heart of the SI system is a short list of base units defined in an absolute way without referring to any other units. 2005, Second Edition 2006 Published: iUniverse. Therefore, the full absolute system of units in which the practical electrical units are coherent is the quadrant–eleventh-gram–second (QES) system. Namely, the combination of the meter and the kilogram was the only choice of base units of length and mass such that 1. the volt-ampere—which is also called the watt and which is the unit of power in the practical system of electrical units—is coherent, 2. the base units of length and mass are decimal multiples or submultiples of the meter and the gram, and 3. the base units of length and mass have convenient sizes. ›› The base units that we will use in this text, and later in General Chemistry include the meter (m) for distance, the kilogram (kg) for mass and the second (s) for time. [29][Note 14] It was of course known that just adopting the meter and the kilogram as base units—obtaining the three dimensional MKS system—would not solve the problem: while the watt and the joule would be coherent, this would not be so for the volt, the ampere, the ohm, and the rest of the practical units for electric and magnetic quantities (the only three-dimensional absolute system in which all practical units are coherent is the QES system). These abbreviations include: Once you get the basic system down, understanding the way that metric abbreviations are created isn’t so hard. The subunits are used when measuring very large or very small things. The reason is that electrical quantities cannot be isolated from mechanical and thermal ones: they are connected by relations such as current × electric potential difference = power. missblackburn. Plural form: gigagrams. Indeed, one can work out what the base units of length and mass have to be in order for all the practical units to be coherent (the watt and the joule as well as the volt, the ampere, etc.). Some of these approaches were based on equipment and procedures that would enable the reproducible production of new, kilogram-mass prototypes on demand (albeit with extraordinary effort) using measurement techniques and material properties that are ultimately based on, or traceable to, physical constants. [33]:109,110 In 1948 the CGPM commissioned the CIPM "to make recommendations for a single practical system of units of measurement, suitable for adoption by all countries adhering to the Metre Convention". For quite a long time, the ESU and EMU units did not have special names; one would just say, e.g. [14], In the 19th century the French word kilo, a shortening of kilogramme, was imported into the English language where it has been used to mean both kilogram[15] and kilometre. 0.1 gram. It is defined as exactly 0.45359237 kilograms. metric tonne or kilogram-force The SI base unit for mass is the kilogram. In 1901, Giovanni Giorgi proposed a new system of units that would remedy this state of affairs. Scale factor: 1000000 ›› SI unit: kilogram. Length: Meter (m) The meter is the metric unit of length.It's defined as the length of the path light travels in a vacuum during 1/299,792,458 of a second. Kilograms. The watt is not coherent in the centimeter-gram-second system, but it is coherent in the meter-kilogram-second system—and in no other system whose base units of length and mass are reasonably sized decimal multiples or submultiples of the meter and the gram. which revised the provisional system of units introduced by the French National Convention two years earlier, where the gravet had been defined as weight (poids) of a cubic centimetre of water, equal to 1/1000 of a grave. Abbreviation/Symbol: kg kilo (informal) Unit of: Mass; Weight (in non-scientific affairs) Worldwide use: Global; 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). Now that you have a good understanding of abbreviations used in the metric system, you might want to learn how abbreviations are different from acronyms. (FAQ - Mass & Density), Redefining the kilogram through the Avogadro constant. ...gram = 1g (gram 1000g = 1 kg ( kilogram ) 28g = 1 ounce 2.2 pounds = 1 kg ( kilogram ) In German recipes, everything is … Milligram mg Try these conversions, using the ladder method. Kilogram definition, a unit of mass equal to 1,000 grams: the basic unit of mass in the International System of Units (SI). Meter m 5. Kilogram becoming a base unit: the role of units for electromagnetism, The state of units for electromagnetism at the end of the 19th century, Acceptance of the Giorgi system, leading to the MKSA system and the SI, Redefinition based on fundamental constants, The French text (which is the authoritative text) states ", Let us show that, if it is known that the metre and the kilogram satisfy all three conditions, then no other choice does. In America, you might be familiar with the Fahrenheit system for temperature, but the metric system uses Celsius and Kelvin. [9] The coherent unit of power, when written out in terms of the base units of length, mass, and time, is (base unit of mass) × (base unit of length), A system in which the base quantities are length, mass, and time, and, We will see that there is only one three-dimensional 'absolute' system. The meter and the second are defined in terms of c, the speed of light, and cesium frequency, ΔνCs. 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