List of international units

This list of international units is subsidiary to the list of units article and lists widely used modern units in a form of sortable table.

Unit system	Domain	Derivation	Unit name	Unit symbol	Dimension symbol	Quantity name	Definition	In SI base units	In other SI units
										SI	Physics	Basic	second [n 1]	s	T	time	The duration of 9192631770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium-133 atom.	s
SI	Physics	Basic	metre	m	L	length	The distance travelled by light in vacuum in ⁠1/299792458⁠ second.	m
SI	Physics	Basic	kilogram [n 2]	kg	M	mass	The kilogram is defined by setting the Planck constant h exactly to 6.62607015×10−34 J⋅s (J = kg⋅m2⋅s−2), given the definitions of the metre and the second.[1]	kg
SI	Physics	Basic	ampere	A	I	electric current	The flow of exactly ⁠1/1.602176634×10−19⁠ times the elementary charge e per second. Equalling approximately 6.2415090744×1018 elementary charges per second.	A
SI	Physics	Basic	kelvin	K	Θ	thermodynamic temperature	The kelvin is defined by setting the fixed numerical value of the Boltzmann constant k to 1.380649×10−23 J⋅K−1, (J = kg⋅m2⋅s−2), given the definition of the kilogram, the metre, and the second.	K
SI	Physics	Basic	mole	mol	N	amount of substance	The amount of substance of exactly 6.02214076×1023 elementary entities.[n 3] This number is the fixed numerical value of the Avogadro constant, NA, when expressed in the unit mol−1.	mol
SI	Physics	Basic	candela	cd	J	luminous intensity	The luminous intensity, in a given direction, of a source that emits monochromatic radiation of frequency 5.4×1014 hertz and that has a radiant intensity in that direction of ⁠1/683⁠ watt per steradian.	cd
SI	Physics	Relational	radian[n 4]	rad		plane angle		m/m	1
SI	Physics	Relational	steradian	sr		solid angle		m2/m2	1
SI	Physics	Relational	hertz	Hz		frequency		s−1
SI	Physics	Relational	newton	N		force		kg⋅m⋅s−2
SI	Physics	Relational	pascal	Pa		pressure		kg⋅m−1⋅s−2	N/m2
SI	Physics	Relational	joule	J		energy, work, heat		kg⋅m2⋅s−2	N⋅m = Pa⋅m3
SI	Physics	Relational	watt	W		power, radiant flux		kg⋅m2⋅s−3	J/s
SI	Physics	Relational	coulomb	C		electric charge		s⋅A
SI	Physics	Relational	volt	V		electrical potential difference (voltage), emf		kg⋅m2⋅s−3⋅A−1	W/A = J/C
SI	Physics	Relational	farad	F		capacitance		kg−1⋅m−2⋅s4⋅A2	C/V
SI	Physics	Relational	ohm	Ω		resistance, impedance, reactance		kg⋅m2⋅s−3⋅A−2	V/A
SI	Physics	Relational	siemens	S		electrical conductance		kg−1⋅m−2⋅s3⋅A2	Ω−1
SI	Physics	Relational	weber	Wb		magnetic flux		kg⋅m2⋅s−2⋅A−1	V⋅s
SI	Physics	Relational	tesla	T		magnetic flux density		kg⋅s−2⋅A−1	Wb/m2
SI	Physics	Relational	henry	H		inductance		kg⋅m2⋅s−2⋅A−2	Wb/A
SI	Physics	Relational	degree Celsius	°C		temperature relative to 273.15 K		K
SI	Physics	Relational	lumen	lm		luminous flux		cd⋅sr
SI	Physics	Relational	lux	lx		illuminance		cd⋅sr⋅m−2	lm/m2
SI	Physics	Relational	becquerel	Bq		radioactivity (decays per unit time)		s−1
SI	Physics	Relational	gray	Gy		absorbed dose (of ionising radiation)		m2⋅s−2	J/kg
SI	Physics	Relational	sievert	Sv		equivalent dose (of ionising radiation)		m2⋅s−2	J/kg
SI	Physics	Relational	katal	kat		catalytic activity		mol⋅s−1
SI	Physics	Dimensional	square metre	m2	A	area
SI	Physics	Dimensional	cubic metre	m3	V	volume
SI	Physics	Relational	metre per second	m/s	v	speed, velocity
SI	Physics	Relational	metre per second squared	m/s2	a	acceleration
SI	Physics	Relational	reciprocal metre	m−1	σ, ṽ or in optics V, 1/f	wavenumber, vergence (optics)
SI	Physics	Relational	kilogram per cubic metre	kg/m3	ρ	density
SI	Physics	Relational	kilogram per square metre	kg/m2	ρA	surface density
SI	Physics	Relational	cubic metre per kilogram	m3/kg	v	specific volume
SI	Physics	Relational	ampere per square metre	A/m2	j	current density
SI	Physics	Relational	ampere per metre	A/m	H	magnetic field strength
SI	Physics	Relational	mole per cubic metre	mol/m3	c	concentration
SI	Physics	Relational	kilogram per cubic metre	kg/m3	ρ, γ	mass concentration
SI	Physics	Relational	candela per square metre	cd/m2	Lv	luminance
?	Economics	Relational				velocity of money
?	Economics	Relational				gross margin