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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