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 these units, and their definitions, 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		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 heat capacity, molar entropy		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-1	luminous efficacy		kg-1 m-2 s3 cd

All SI coherent derived units can be defined in terms of products of powers of the seven SI base units, or more directly in terms of products of powers of the seven SI defining constants and a dimensionless scaling factor.