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[edit]
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[edit]
Metric units that are not part of the SI include
Space and time[edit]
Distance[edit]
- The fermi is equal to one femtometre (1 fm).[1]
- 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[edit]
- 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[edit]
Reciprocal length[edit]
- 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[edit]
- The shake is equal to ten nanoseconds (10 ns).
Frequency[edit]
- The cycle per second is equal to one hertz (1 Hz).
Speed[edit]
- The benz is equal to one metre per second (1 m/s).
Acceleration[edit]
Mechanics[edit]
Mass[edit]
Force[edit]
- The dyne (dyn) is equal to ten micronewtons (10 μN).[3]
- The sthene (sn) is equal to one kilonewton (1 kN).
Pressure[edit]
- 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[edit]
- The erg (erg) is equal to 100 nanojoules (100 nJ).[4]
Viscosity[edit]
- The poise (P) is a unit of dynamic viscosity equal to one hundred grams per (metre second) (100 g m-1 s-1).[5]
- The stokes (St) is a unit of kinematic viscosity equal to one hundred millimetres squared per second (100 mm2/s).[6]
Electromagnetism[edit]
Electricity[edit]
- 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 dyn1/2 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 cm1/2 g1/2 s-1.
- The abohm (abΩ) is a unit of electrical resistance equal to one nanohm (1 nΩ).
Magnetism[edit]
- The gauss (G) is a unit of magnetic flux density equal to one hundred microteslas (100 μT).[7]
- The maxwell (Mx) is a unit of magnetic flux equal to ten nanowebers (10 nWb).[8]
- 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 g1/2 s-1.
Light[edit]
- 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).[9]
- 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).[10]
Base-10 logarithmic units[edit]
Level (power ratio)[edit]
Information and computer storage[edit]
- 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[edit]
- The decidecade is a logarithmic unit of frequency ratio equal to one tenth of a decade.[11]
- 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[edit]
- 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
References[edit]
- ^ Nuclear Size and Shape
- ^ Table 9, BIPM brochure, 8th Ed
- ^ Table 9, BIPM brochure, 8th Ed
- ^ Table 9, BIPM brochure, 8th Ed
- ^ Table 9, BIPM brochure, 8th Ed
- ^ Table 9, BIPM brochure, 8th Ed
- ^ [1]
- ^ [2]
- ^ Table 9, BIPM brochure, 8th Ed
- ^ [3]
- ^ ISO 18405 Underwater Acoustics - Terminology (International Organization for Standardization, Geneva, 2017)