| 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 )
weight | 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
abohm |
| 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)
faraday |
| 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
(Kbps)
megabit per second
(Mbps)
gigabit per second
(Gbps)
character per second
(cps) |
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