SI Derived Units

The following units are all SI units, have their own names, but can still be reduced in terms of the 7 SI base units, and are thus SI derived units, not SI base units.

	SI derived unit
Derived quantity	Name	Symbol	Expression in terms of  other SI units	Expression in terms of SI base units
absorbed dose	gray	Gy	J/kg	m2·s-2
capacitance	farad	F	C/V	m-2·kg-1·s4·A2
decay activity	becquerel	Bq	-	s-1
dose equivalent	sievert	Sv	J/kg	m2·s-2
electric charge	coulomb	C	-	s·A
electric conductance	siemens	S	A/V	m-2·kg-1·s3·A2
electric potential difference	volt	V	W/A	m2·kg·s-3·A-1
electric resistance	ohm	W	V/A	m2·kg·s-3·A-2
energy, work	joule	J	N·m	m2·kg·s-2
frequency	hertz	Hz	-	s-1
force	newton	N	-	m·kg·s-2
illuminance	lux	lx	lm/m2	m-2·cd
inductance	henry	H	Wb/A	m2·kg·s-2·A-2
luminous flux	lumen	lm	cd·sr	cd
magnetic flux	weber	Wb	V·s	m2·kg·s-2·A-1
magnetic flux density	tesla	T	Wb/m2	kg·s-2·A-1
power	watt	W	J/s	m2·kg·s-3
pressure, stress	pascal	Pa	N/m2	m-1·kg·s-2

© W. Bauer, 1999