SI derived unit

Units with Special names and Symbols

Physical quantity	Name of SI unit	Symbol for SI unit	Expression in terms of other units	Expression in terms of SI base units]]
Special names and Symbols
frequency	hertz	Hz
force	newton	N
pressure, stress	pascal	Pa
energy, work, heat	joule	J
power, radiant flux	watt	W
electric charge	coulomb	C
electric potential, electromotive force	volt	V
electrical resistance	ohm	Ω
electric conductance	siemens	S
electric capacitance	farad	F	C · V-1
magnetic flux density, magnetic inductivity	tesla	T
magnetic flux	weber	Wb
inductance	henry	H
temperature	degree Celsius	°C	K
plane angle	radian	rad	1	= m · m-1
solid angle	steradian	sr	1	= m2 · m-2
luminous flux	lumen	lm	cd · sr
illuminance	lux	lx	cd · sr · m-2
activity (radioactive)	becquerel	Bq	s-1
absorbed dose (of radiation)	gray	Gy	J · kg-1	= m2 · s-2
dose equivalent (dose equivalent index)	sievert	Sv	J · kg-1	= m2 · s-2
catalytic activity	katal	kat	mol · s-1

Other quantities and units

Physical quantity	Name of SI unit	Symbol for SI unit	Expression in terms of SI base units
area	square metre	m2
volume	cubic metre	m3
speed, velocity	metre per second	m · s-1
angular velocity	radian per second	rad · s-1	s-1
acceleration	metre per second squared	m · s-2
moment of force	newton metre	N · m	= m2 · kg · s-2
wavenumber	reciprocal metre	m-1
density, mass density	kilogram per cubic metre	kg · m-3
specific volume	cubic metre per kilogram	m3 · kg-1
amount (-of-substance) concentration	mole per cubic metre	mol · m-3
molar volume	cubic metre per mole	m3 · mol-1
heat capacity, entropy	joule per kelvin	J · K-1	= m2 · kg · s-2 · K-1
molar heat capacity, molar entropy	joule per kelvin mole	J · K-1 · mol-1	= m2 · kg · s-2 · K-1 · mol-1
specific heat capacity, specific entropy	joule per kilogram kelvin	J · K-1 · kg-1	= m2 · s-2 · K-1
molar energy	joule per mole	J · mol-1	= m2 · kg · s-2 · mol-1
specific energy	joule per kilogram	J · kg-1	= m2 · s-2
energy density	joule per cubic metre	J · m-3	= m-1 · kg · s-2
surface tension	newton per metre	N · m-1 = J · m-2	= kg · s-2
heat flux density, irradiance	watt per square metre	W · m-2	= kg · s-3
thermal conductivity	watt per metre kelvin	W · m-1 · K-1	= m · kg · s-3 · K-1
kinematic viscosity, diffusion coefficient	square metre per second	m2 · s-1
dynamic viscosity	pascal second	Pa · s = N · s · m-2	= m-1 · kg · s-1
electric charge density	coulomb per cubic metre	C · m-3	m-3 · s · A
electric current density	ampere per square metre	A · m-2
conductivity	siemens per metre	S · m-1	= m-3 · kg-1 · s3 · A 2
molar conductivity	siemens square metre per mole	S · m2 · mol-1	= kg-1 · mol-1 · s3 · A 2
permittivity	farad per metre	F · m-1	= m-3 · kg-1 · s4 · A 2
permeability	henry per metre	H · m-1	= m · kg · s-2 · A-2
electric field strength	volt per metre	V · m-1	= m · kg · s-3 · A-1
magnetic field strength	ampere per metre	A · m-1
luminance	candela per square metre	cd · m-2
exposure (X and gamma rays)	coulomb per kilogram	C · kg-1	= kg-1 · s · A
absorbed dose rate	gray per second	Gy · s-1	= m2 · s-3

Also see

• List of scientific units named after people

References:

• I. Mills, Tomislav Cvitas, Klaus Homann, Nikola Kallay, IUPAC: Quantities, Units and Symbols in Physical Chemistry, 2nd edition (June 1993), Blackwell Science Inc (p. 72)

Referenced By