Browse Definitions:

Table of Physical Units

This table contains links to definitions of physicalquantities, phenomena, and units,primarily in the International System of Units ( SI )and the meter-kilogram-second ( MKS ) system.

Base Units
Quantity or phenomenon
(and symbol)
Standard International unit
(and symbol)
Alternate units
(and symbols)
displacement ( d ) meter (m) centimeter (cm)
foot (ft)
mass ( m ) kilogram (kg) gram (g)
time ( t ) second (s or sec) hour (h or hr)
mean solar day (dy)
solar year (yr)
current ( I ) ampere (A) statampere (statA)
abampere (abA)
temperature ( T ) kelvin (ºK or K) degree Celsius (ºC or C)
degree Fahrenheit (ºF or F)
degree Rankine (ºR or R)
amount of substance ( /TERM> mole (mol) --
luminous intensity
( B or L )
candela (cd) --
Derived Units
Quantity or phenomenon
(and symbol)
Standard International unit
(and symbol)
Alternate units
(and symbols)
area ( A ) meter squared (m 2 ) centimeter squared (cm 2 )
circular mil
foot squared (ft 2 )
volume ( V ) meter cubed (m 3 ) centimeter cubed (cm 3 )
foot cubed (ft 3 )
material density ( D ) kilogram per meter cubed
(kg/m 3 or kg · m -3 )
gram per centimeter cubed
(g/cm 3 or g · cm -3 )
specific volume meter cubed per kilogram
(m 3 /kg or m 3 · kg -1 )
centimeter cubed per gram
(cm 3 /g or cm 3 · g -1 )
amount of substance concentration mole per meter cubed
(mol/m 3 or mol · m -3 )
force ( F or F )
newton (N) dyne (dyn)
pound (lb)
impulse ( I or I ) newton-second (N · s) dyne-second (dyn · s)
work ( w ) newton-meter (N · m) dyne-centimeter (dyn · cm)
pressure ( P ) pascal (Pa) dyne per centimeter squared
(dyn/cm 2 or dyn · cm -2 )
speed ( s )
velocity ( v or v )
meter per second
(m/s or m · s -1 )
centimeter per second
(cm/s or cm · s -1 )
momentum ( p or p ) kilogram-meter per second
(kg · m/s or kg · m · s -1 )
gram-centimeter per second
(g · cm/s or g · cm · s -1 )
acceleration ( a or a ) meter per second squared
(m/s 2 or m · s -2 )
centi meter per second squared
(cm/s 2 or cm · s -2 )
gravity (g)
current density ampere per meter squared
(A/m 2 or A · m -2 )
ampere per centimeter squared
(A/cm 2 or A · cm -2 )
electromotive force (emf)
voltage ( V or E )
volt (V) statvolt (statV)
abvolt (abV)
resistance ( R ) ohm statohm
conductance ( G ) siemens (S) statsiemens (statS)
absiemens (abS)
electric field strength ( E ) volt per meter
(V/m or V · m -1 )
microvolt per meter
(µV/m or µV · m -1 )
electric flux density ( D ) coulomb per meter squared
(C/m 2 or C · m -2 )
coulomb per centimeter squared
(C/cm 2 or C · cm -2 )
electric charge density coulomb per meter cubed
(C/m 3 or C · m -3 )
coulomb per centimeter cubed
(C/cm 3 or C · cm -3 )
permittivity farad per meter
(F/m or F · m -1 )
picofarad per meter
(pF/m or pF · m -1 )
microfarad per meter
(µF/m or µF · m -1 )
power ( P ) watt (W) horsepower (hp)
statwatt (statW)
abwatt (abW)
energy ( E ) joule (J) erg (erg)
watt hour (Wh)
kilowatt hour (kWh)
heat ( h ) calorie (cal) kilocalorie (kcal)
British thermal unit (Btu)
magnetomotive force ( M ormmf) ampere-turn (AT) gilbert (G)
charge quantity ( Q ) coulomb (C) statcoulomb (statC)
abcoulomb (abC)
capacitance ( C ) farad (F) statfarad (statF)
abfarad (abF)
inductance ( L ) henry (H) stathenry (statH)
abhenry (abH)
magnetic flux weber (Wb) maxwell (Mx)
magnetic flux density tesla (T) gauss (G)
magnetic field strength ( H ) ampere per meter
(A/m or A · m -1 )
oersted (Oe)
permeability ( µ ) henry per meter
(H/m or H · m -1 )
microhenry per meter
(µH/m or µH · m -1 )
electromagnetic field strength watt per meter squared
(W/m 2 or W · m -2 )
microwatt per meter squared
(µW/m 2 or µW · m -2 )
radiant intensity watt per steradian
(W/sr or W · sr -1 )
luminous flux lumen (lm) --
luminance candela per meter squared
(cd/m 2 or cd · m -2 )
candela per centimeter squared
(cd/cm 2 or cd · cm -2 )
illuminance lux (lx) watt per meter squared
(W/m 2 or W · m -2 )
plane angular measure radian (rad) angular degree (deg or º)
solid angular measure steradian (sr) angular degree (deg or º)
angular speed
angular velocity
radian per second
(rad/s or rad · s -1 )
degree per second
(deg/s or deg · s -1 )
angular acceleration radian per second squared
(rad/s 2 or rad · s -2 )
degree per second squared
(deg/s 2 or deg · s -2 )
ionizing radiation becquerel (Bq) curie (cu)
absorbed ionizing radiation dose gray (Gy) rad (rad)
frequency ( f ) hertz (Hz) kilohertz (kHz)
megahertz (MHz)
gigahertz (GHz)
terahertz (THz)
wavelength meter (m) centimeter (cm)
millimeter (mm)
micrometer (µm or µ)
nanometer (nm)
Angström (Å)
wave number reciprocal meter (m -1 ) --
data quantity bit (b)
byte (B)
kilobit (kb)
megabit (Mb)
gigabit (Gb)
terabit (Tb)
petabit (Pb)
exabit (Eb)
kilobyte (KB)
megabyte (MB)
gigabyte (GB)
terabyte (TB)
petabyte (PB)
exabyte (EB)
bandwidth (signal) Hertz (Hz) kilohertz ( kHz )
megahertz ( MHz )
bandwidth (data transfer rate) bit per second ( bps ) kilobit per second
megabit per second
gigabit per second
character per second
This was last updated in May 2008

Join the conversation

1 comment

Send me notifications when other members comment.

By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Please create a username to comment.



Extensiones de Documento y Formatos de Documento

Accionado por:


  • risk map (risk heat map)

    A risk map, also known as a risk heat map, is a data visualization tool for communicating specific risks an organization faces. A...

  • internal audit (IA)

    An internal audit (IA) is an organizational initiative to monitor and analyze its own business operations in order to determine ...

  • pure risk (absolute risk)

    Pure risk, also called absolute risk, is a category of threat that is beyond human control and has only one possible outcome if ...


  • cloud ecosystem

    A cloud ecosystem is a complex system of interdependent components that all work together to enable cloud services.

  • cloud services

    Cloud services is an umbrella term that may refer to a variety of resources provided over the internet, or to professional ...

  • uncloud (de-cloud)

    The term uncloud describes the action or process of removing applications and data from a cloud computing platform.


  • federated identity management (FIM)

    Federated identity management (FIM) is an arrangement that can be made among multiple enterprises to let subscribers use the same...

  • cross-site scripting (XSS)

    Cross-site scripting (XSS) is a type of injection security attack in which an attacker injects data, such as a malicious script, ...

  • firewall

    In computing, a firewall is software or firmware that enforces a set of rules about what data packets will be allowed to enter or...




  • bad block

    A bad block is an area of storage media that is no longer reliable for storing and retrieving data because it has been physically...

  • all-flash array (AFA)

    An all-flash array (AFA), also known as a solid-state storage disk system, is an external storage array that uses only flash ...

  • volume manager

    A volume manager is software within an operating system (OS) that controls capacity allocation for storage arrays.


  • hybrid hard disk drive (HDD)

    A hybrid hard disk drive is an electromechanical spinning hard disk that contains some amount of NAND Flash memory.