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)