NOTICE: Citizendium is still being set up on its newer server, treat as a beta for now; please see here for more. |

Citizendium - a community developing a quality comprehensive compendium of knowledge, online and free. Click here to join and contribute—free |

CZ thanks our previous donors. Donate here. Treasurer's Financial Report -- Thanks to our content contributors. -- |

# International System of Units/Related Articles

From Citizendium, the Citizens' Compendium

*See also changes related to International System of Units, or pages that link to International System of Units or to this page or whose text contains "International System of Units".*

## Parent topics

## Subtopics

- Chemical engineering [r]: The field of engineering that deals with industrial and natural processes involving the chemical, physical or biological transformation of matter or energy into forms useful for mankind, economically and safely without compromising the environment
^{[e]} - Chemistry [r]: The science of matter, or of the electrical or electrostatical interactions of matter.
^{[e]} - Engineering [r]: The profession in which a knowledge of the mathematical and natural sciences gained by study, experience and practice is applied with judgment to develop ways to economically use the materials and forces of nature for the benefit of mankind.
^{[e]} - International Bureau of Weights and Measures [r]: An international standards organization (commonly referred to as the BIPM) established to maintain the International System of Units (SI).
^{[e]}- BIPM: A redirect
- Bureau International des Poids et Mesures

- Systems of measurement [r]: A set of units which can be used to specify anything which can be measured and were historically important, regulated and defined because of trade and internal commerce.
^{[e]}

## Units

- Atmosphere (unit) [r]: A unit of pressure measurement (symbol: atm) defined as 101,325 pascal.
^{[e]} - Bar (unit) [r]: A unit of pressure measurement (symbol: bar) defined as 100,000 Pascals.
^{[e]} - Erg (unit) [r]: A cgs unit of energy (obsolete); 1 erg = 10
^{−7}joule^{[e]} - Factor-label conversion of units [r]: A widely used method for converting one set of dimensional units to another set of equivalent units.
^{[e]} - Gauss (unit) [r]: Gaussian unit of magnetic flux density
**B**; symbol G; 1 G = 1 Mx/cm^{2}= 10 000 T.^{[e]} - Kilogram [r]: The kilogram is the basic unit of mass in the International System of Units (SI, metric system).
^{[e]} - Langley (unit) [r]: Energy density unit defined as 1 calorie per square centimeter and equal to 0.0858 Watt/meter
^{2}(W/m^{2}).^{[e]} - Metre (unit) [r]: Unit of length; one of the seven SI base units.
^{[e]} - Oersted (unit) [r]: Unit of magnetic-field strength |
**H**| in the Gaussian system of units; symbol Oe; 1 Oe = 1000/4π A⋅turn/m.^{[e]} - Pascal (unit) [r]: The SI unit of pressure; the force of one newton acting uniformly over an area of one square metre.
^{[e]} - Siemens (unit) [r]: The SI unit of electrical conductance.
^{[e]} - Tesla (unit) [r]: SI unit for magnetic flux density
**B**; symbol T; 1 T = 1 Wb/m^{2}.^{[e]} - U.S. customary units [r]: The units of measurement that are currently used in the United States.
^{[e]} - Weber (unit) [r]: SI unit of magnetic flux; symbol Wb; 1 Wb = 1 V⋅s.
^{[e]}

## Related topics

- Speed of light [r]: A physical constant
*c*describing the speed of electromagnetic radiation in vacuum. In the International System of Units the metre is the distance light travels in classical vacuum in 1/*c*seconds, using the defined value*c = c*≡ 299 792 458 m/s (exact)._{0}^{[e]} - Special relativity [r]: Theory of the effects of motion on observations of things such as length, time, mass and energy. The theory is based on the postulates that all laws of physics are the same in all inertial reference systems, and that the vacuum speed of light is a universal constant, independent of the speed of the source.
^{[e]} - Free space (electromagnetism) [r]: In classical electromagnetism, the vacuum reference state with no fields or particles; in quantum mechanics, the vacuum state with electromagnetic fields fluctuating about an average value of zero.
^{[e]}