kilogram
Also known as kg, kilogramme, kilo, kilograms
The kilogram (also spelled kilogramme) is the base unit of mass in the International System of Units (SI), equal to one thousand grams. It has the unit symbol kg. The word "kilogram" is formed from the combination of the metric prefix kilo- (meaning one thousand) and gram; it is commonly shortened to "kilo" (plural "kilos").
AI overview
The kilogram is the standard unit of mass used worldwide, equal to one thousand grams and symbolized as "kg." It matters because it's the fundamental measurement that scientists, engineers, and everyday people rely on to weigh and compare the mass of objects accurately across different countries and contexts.
AI-generated from the Wikipedia summary — may contain errors.
Key facts
- Unit.name
- kilogram
- Unit.image
- Poids fonte 5 kg à 2 hg 02.jpg
- Unit.caption
- A series of 5, 2, 1, 0.5 and 0.2 kilogram weights, made of cast iron
- Unit.standard
- SI
- Unit.quantity
- mass
- Unit.symbol
- kg
- Unit.units1
- Avoirdupois
- Unit.units2
- British Gravitational
- Unit.inunits2
- ≈ slugs
- Unit.units3
- Unified atomic mass units
via Wikipedia infobox
Wikidata facts
- Image
- CGKilogram.jpg
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Article
11 sectionsContents
- Definition
- Timeline of previous definitions
- Name and terminology
- Redefinition based on fundamental constants
- SI multiples
- Usage and practical issues with SI mass units
- See also
- Notes
- References
- External links
- Videos
The kilogram (also spelled kilogramme) is the base unit of mass in the International System of Units (SI), equal to one thousand grams. It has the unit symbol kg. The word "kilogram" is formed from the combination of the metric prefix kilo- (meaning one thousand) and gram; it is commonly shortened to "kilo" (plural "kilos").
The kilogram is an SI base unit, defined ultimately in terms of three defining constants of the SI, namely a specific transition frequency of the caesium-133 atom, the speed of light, and the Planck constant. A properly equipped metrology laboratory can calibrate a mass measurement instrument such as a Kibble balance as a primary standard for the kilogram mass.