gram
Sign in to saveThe gram (originally gramme; SI unit symbol g) is a unit of mass in the International System of Units (SI) equal to one thousandth of a kilogram.
AI overview
The gram is a unit of measurement used to describe how heavy something is, and it's equal to one thousandth of a kilogram. It matters because it's the standard unit for measuring mass that scientists and people around the world use, making it easy to communicate measurements consistently.
AI-generated from the Wikipedia summary — may contain errors.
Key facts
- Unit.name
- gram
- Unit.image
- 300px
- Unit.caption
- The mass of this Japanese one yen coin is 1.00 gram. A weight scale such as this can give an accurate reading of mass for many objects (see Weight vs. mass).
- Unit.standard
- SI
- Unit.quantity
- Mass
- Unit.symbol
- g
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- SI base units
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- 10−3 kilograms
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- Imperial unitsU.S. customary
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- daltons
via Wikipedia infobox
Article
8 sectionsContents
- Official SI symbol
- History
- Uses
- Conversion factors
- Comparisons
- See also
- Notes
- References
The gram (originally gramme; SI unit symbol g) is a unit of mass in the International System of Units (SI) equal to one thousandth of a kilogram.
Originally defined in 1795 as "the absolute weight of a volume of pure water equal to the cube of the hundredth part of a metre [1 cm3], and at the temperature of melting ice", the defining temperature (0 °C) was later changed to the temperature of maximum density of water (approximately 4 °C). Subsequent redefinitions agree with this original definition to within 30 parts per million (0.003%), with the maximum density of water remaining very close to 1 g/cm3, as shown by modern measurements.