SI coherent derived units whose names and symbols include SI coherent derived units with special names and symbols

The names and symbols of many SI coherent derived units include SI coherent derived units with special names and symbols.

Some of the more common of these units are listed below.

Examples of SI coherent derived units whose names and symbols include SI coherent derived units with special names and symbols

Name	Symbol	Quantity	Expressed in terms of SI base units
pascal second	Pa s	dynamic viscosity	kg m−1 s−1
newton metre	N m	torque, moment of force	kg m2 s−2
newton per metre	N/m	surface tension	kg s−2
joule second	J s	action, angular momentum	kg m2 s−1
radian per second	rad/s	angular velocity	s‑1
radian per second squared	rad/s2	angular acceleration	s‑2
watt per square metre	W/m2	heat flux density, irradiance	kg s‑3
joule per kelvin	J/K	heat capacity, entropy	kg m2 s‑2 K‑1
joule per kilogram kelvin	J/(kg K)	specific heat capacity, specific entropy	m2 s‑2 K‑1
joule per kilogram	J/kg	specific energy	m2 s‑2
watt per metre kelvin	W/(m K)	thermal conductivity	kg m s‑3 K‑1
joule per cubic metre	J/m3	energy density	kg m‑1 s‑2
volt per metre	V/m	electric field strength	kg m s‑3 A‑1
coulomb per cubic metre	C/m3	electric charge density	m‑3 s A
coulomb per square metre	C/m2	surface charge density, electric flux density, electric displacement	m‑2 s A
farad per metre	F/m	permittivity	kg−1 m−3 s4 A2
henry per metre	H/m	permeability	kg m s‑2 A‑2
joule per mole	J/mol	molar energy	kg m2 s‑2 mol‑1
joule per mole kelvin	J/(mol K)	molar entropy, molar heat capacity	kg m2 s‑2 K‑1 mol‑1
coulomb per kilogram	C/kg	exposure (x- and γ-rays)	kg‑1 s A
gray per second	Gy/s	absorbed dose rate	m2 s‑3
watt per steradian	W/sr	radiant intensity	kg m2 s‑3
watt per square metre steradian	W/(m2 sr)	radiance	kg s‑3
katal per cubic metre	kat/m3	catalytic activity	m‑3 s‑1 mol
lumen second	lm s	luminous energy	s cd
lumen per watt	lm/W	luminous efficacy	kg‑1 m‑2 s3 cd