SI Derived Unit Names & Symbols

SI Derived Unit Names & Symbols

Name	Symbol	Quantity	In SI base units	In other SI units
radian	rad	plane angle	m/m	1
steradian	sr	solid angle	m2/m2	1
hertz	Hz	frequency	s−1
newton	N	force, weight	kg⋅m⋅s−2
pascal	Pa	pressure, stress	kg⋅m−1⋅s−2	N/m2 = J/m3
joule	J	energy, work, heat	kg⋅m2⋅s−2	N⋅m = Pa⋅m3
watt	W	power, radiant flux	kg⋅m2⋅s−3	J/s
coulomb	C	electric charge	s⋅A
volt	V	electric potential, voltage, emf	kg⋅m2⋅s−3⋅A−1	W/A = J/C
farad	F	capacitance	kg−1⋅m−2⋅s4⋅A2	C/V = C2/J
ohm	Ω	resistance, impedance, reactance	kg⋅m2⋅s−3⋅A−2	V/A = J⋅s/C2
siemens	S	electrical conductance	kg−1⋅m−2⋅s3⋅A2	Ω−1
weber	Wb	magnetic flux	kg⋅m2⋅s−2⋅A−1	V⋅s
tesla	T	magnetic flux density	kg⋅s−2⋅A−1	Wb/m2
henry	H	inductance	kg⋅m2⋅s−2⋅A−2	Wb/A
degree Celsius	°C	temperature relative to 273.15 K	K
lumen	lm	luminous flux	cd⋅sr	cd⋅sr
lux	lx	illuminance	cd⋅sr⋅m−2	lm/m2
becquerel	Bq	activity referred to a radionuclide (decays per unit time)	s−1
gray	Gy	absorbed dose (of ionizing radiation)	m2⋅s−2	J/kg
sievert	Sv	equivalent dose (of ionizing radiation)	m2⋅s−2	J/kg
katal	kat	catalytic activity	mol⋅s−1