User:Dondervogel 2/Metric units

Metric units are units based on the metre, gram or second and power of ten multiples or sub-multiples of these. The most widely used examples are the units of the International System of Units (SI). Other unit systems using metric units include:

• Centimetre–gram–second system of units
• International System of Electrical and Magnetic Units
• Metre–tonne–second system of units
• MKS system of units

Metric units that are part of the SI

Main article: International System of Units

The modern metric system of units is the SI, comprising seven base units and multiple derived units.

Metric units that are not part of the SI

Metric units that are not part of the SI include

Space and time

Distance

• The fermi is equal to one femtometre (1 fm).
• The angstrom (symbol Å) is equal to one hundred picometres (100 pm).
• The micron (μ) is equal to one micrometre (1 μm).
• The basic module (M) is equal to one hundred millimetres (100 mm).
• The myriametre (mym) is equal to ten kilometres (10 km).
• The Scandinavian mile is equal to ten kilometres (10 km).

Area

• The shed is equal to 10⁻²⁴ barns (10⁻⁵² m²).
• The outhouse is equal to one hundred attometres squared (100 am² = 10⁻³⁴ m²).
• The barn (b) is equal to one hundred femtometres squared (100 fm² = 10⁻²⁸ m²).
• The are (a) is equal to one hundred metres squared (100 m²).
• The decare (daa) is equal to one thousand metres squared (1000 m²).
• The hectare (ha) is equal to ten thousand metres squared (10,000 m²).

Volume

• The litre (symbol l or L) is equal to one cubic decimetre (1 dm³).

Reciprocal length

• The dioptre is equal to one inverse metre (1 m^-1).
• The kayser (K) is equal to one hundred inverse metres (100 m^-1).

Time

• The shake is equal to ten nanoseconds (10 ns).

Frequency

• The cycle per second is equal to one hertz (1 Hz).

Speed

• The benz is equal to one metre per second (1 m/s).

Acceleration

• The gal (Gal) is equal to ten millimetres per second squared (10 mm/s²).

Mechanics

Mass

• The grave is equal to one kilogram (1 kg).
• The tonne (t) is equal to one megagram (1 Mg).

Force

• The dyne (dyn) is equal to ten micronewtons (10 μN).
• The sthene (sn) is equal to one kilonewton (1 kN).

Pressure

• The barye (Ba) is equal to one hundred millipascals (100 mPa).
• The pièze (pz) is equal to one kilopascal (1 kPa).
• The bar (bar) is equal to one hundred kilopascals (100 kPa).

Energy

• The erg (erg) is equal to 100 nanojoules (100 nJ).

Viscosity

• The poise (P) is a unit of dynamic viscosity equal to one hundred grams per (metre second) (100 g m^-1 s^-1).
• The stokes (St) is a unit of kinematic viscosity equal to one hundred millimetres squared per second (100 mm²/s).

Electromagnetism

Electricity

• The abampere (abA) or biot (Bi) is a unit of current equal to ten amperes (10 A).
• The abcoulomb (abC) is a unit of electrical charge equal to ten coulombs (10 C).
• The statcoulomb (statC) is a unit of electrical charge equal 1 dyn^1/2 cm.
• The abvolt (abV) is a unit of potential difference equal to ten nanovolts (10 nV).
• The statvolt (statV) is a unit of potential difference equal to 1 cm^1/2 g^1/2 s^-1.
• The abohm (abΩ) is a unit of electrical resistance equal to one nanohm (1 nΩ).

Magnetism

• The gauss (G) is a unit of magnetic flux density equal to one hundred microteslas (100 μT).
• The maxwell (Mx) is a unit of magnetic flux equal to ten nanowebers (10 nWb).
• The abhenry is a unit of inductance equal to one nanohenry (1 nH).
• The oersted (Oe) is a unit of magnetic field equal to 1 cm^-1/2 g^1/2 s^-1.

Light

• The nox (nx) is a unit of illuminance equal to 1 millilux (1 mlx).
• The phot (ph) is a unit of illuminance equal to 10 kilolux (10 klx).
• The nit (nt) is a unit of luminance equal to one candela per metre squared (1 cd m^-2).
• The stilb (sb) is a unit of luminance equal to ten kilocandelas per metre squared (10 kcd m^-2).

Base-10 logarithmic units

Level (power ratio)

• The decibel is a unit of level equal to one tenth of a bel.

Information and computer storage

• The deciban is a logarithmic unit of information equal to one tenth of a ban.
• The kilobyte (kB) is a logarithmic unit of computer data storage equal to one thousand bytes.
• The megabyte (MB) is a logarithmic unit of computer data storage equal to one thousand kilobytes.
• The gigabyte (GB) is a logarithmic unit of computer data storage equal to one thousand megabytes.
• The terabyte (TB) is a logarithmic unit of computer data storage equal to one thousand gigabytes.
• The petabyte (PB) is a logarithmic unit of computer data storage equal to one thousand terabytes.
• The exabyte (EB) is a logarithmic unit of computer data storage equal to one thousand petabytes.
• The zettabyte (ZB) is a logarithmic unit of computer data storage equal to one thousand exabytes.
• The yottabyte (YB) is a logarithmic unit of computer data storage equal to one thousand zettabytes.

Frequency ratio

• The decidecade is a logarithmic unit of frequency ratio equal to one tenth of a decade.
• The savart (or heptaméride) is a logarithmic unit of frequency ratio equal to one thousandth of a decade.
• The decaméride is a logarithmic unit of frequency ratio equal to one tenth of a savart.

See also

• Electrostatic units
• Gaussian units
• Gravitational metric system
• History of the metric system
• Introduction to the metric system
• ISO 2848
• Logarithmic scale
• Metric system
• Outline of the metric system