Name: International System of Units (SI Units) Dataset
License: https://creativecommons.org/licenses/by/4.0/

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Key Takeaways

Access 53 comprehensive SI Units, including base and derived units.
Explore precise definitions, symbols, quantities, and dimensions for each unit.
Download unit data in flexible Excel, CSV, or printable PDF formats.
Leverage accurate SI unit information for scientific research and educational materials.

Showing 53 of 53

Name	Symbol	Quantity	Type	Definition	Dimension
metre	m	length	Base Unit	Distance light travels in 1/299,792,458 second	L
kilogram	kg	mass	Base Unit	Defined by Planck constant h = 6.62607015×10⁻³⁴ J·s	M
second	s	time	Base Unit	9,192,631,770 periods of cesium-133 radiation	T
ampere	A	electric current	Base Unit	Defined by elementary charge e = 1.602176634×10⁻¹⁹ C	I
kelvin	K	thermodynamic temperature	Base Unit	Defined by Boltzmann constant k = 1.380649×10⁻²³ J/K	Θ
mole	mol	amount of substance	Base Unit	Exactly 6.02214076×10²³ elementary entities	N
candela	cd	luminous intensity	Base Unit	Luminous efficacy Kcd = 683 lm/W at 540 THz	J
hertz	Hz	frequency	Derived Unit	s⁻¹	T⁻¹
newton	N	force	Derived Unit	kg·m·s⁻²	M·L·T⁻²
pascal	Pa	pressure, stress	Derived Unit	N/m² = kg·m⁻¹·s⁻²	M·L⁻¹·T⁻²
joule	J	energy, work, heat	Derived Unit	N·m = kg·m²·s⁻²	M·L²·T⁻²
watt	W	power, radiant flux	Derived Unit	J/s = kg·m²·s⁻³	M·L²·T⁻³
coulomb	C	electric charge	Derived Unit	A·s	T·I
volt	V	electric potential	Derived Unit	W/A = kg·m²·s⁻³·A⁻¹	M·L²·T⁻³·I⁻¹
farad	F	capacitance	Derived Unit	C/V = kg⁻¹·m⁻²·s⁴·A²	M⁻¹·L⁻²·T⁴·I²
ohm	Ω	electrical resistance	Derived Unit	V/A = kg·m²·s⁻³·A⁻²	M·L²·T⁻³·I⁻²
siemens	S	electrical conductance	Derived Unit	A/V = kg⁻¹·m⁻²·s³·A²	M⁻¹·L⁻²·T³·I²
weber	Wb	magnetic flux	Derived Unit	V·s = kg·m²·s⁻²·A⁻¹	M·L²·T⁻²·I⁻¹
tesla	T	magnetic flux density	Derived Unit	Wb/m² = kg·s⁻²·A⁻¹	M·T⁻²·I⁻¹
henry	H	inductance	Derived Unit	Wb/A = kg·m²·s⁻²·A⁻²	M·L²·T⁻²·I⁻²
degree Celsius	°C	temperature	Derived Unit	K - 273.15	Θ
lumen	lm	luminous flux	Derived Unit	cd·sr	J
lux	lx	illuminance	Derived Unit	lm/m² = cd·sr·m⁻²	J·L⁻²
becquerel	Bq	radioactivity	Derived Unit	s⁻¹ (decays per second)	T⁻¹
gray	Gy	absorbed dose	Derived Unit	J/kg = m²·s⁻²	L²·T⁻²
sievert	Sv	equivalent dose	Derived Unit	J/kg = m²·s⁻²	L²·T⁻²
katal	kat	catalytic activity	Derived Unit	mol·s⁻¹	N·T⁻¹
radian	rad	plane angle	Derived Unit	m/m = 1 (dimensionless)	1
steradian	sr	solid angle	Derived Unit	m²/m² = 1 (dimensionless)	1
quetta	Q	SI prefix	Prefix	10³⁰	-
ronna	R	SI prefix	Prefix	10²⁷	-
yotta	Y	SI prefix	Prefix	10²⁴	-
zetta	Z	SI prefix	Prefix	10²¹	-
exa	E	SI prefix	Prefix	10¹⁸	-
peta	P	SI prefix	Prefix	10¹⁵	-
tera	T	SI prefix	Prefix	10¹²	-
giga	G	SI prefix	Prefix	10⁹	-
mega	M	SI prefix	Prefix	10⁶	-
kilo	k	SI prefix	Prefix	10³	-
hecto	h	SI prefix	Prefix	10²	-
deca	da	SI prefix	Prefix	10¹	-
deci	d	SI prefix	Prefix	10⁻¹	-
centi	c	SI prefix	Prefix	10⁻²	-
milli	m	SI prefix	Prefix	10⁻³	-
micro	μ	SI prefix	Prefix	10⁻⁶	-
nano	n	SI prefix	Prefix	10⁻⁹	-
pico	p	SI prefix	Prefix	10⁻¹²	-
femto	f	SI prefix	Prefix	10⁻¹⁵	-
atto	a	SI prefix	Prefix	10⁻¹⁸	-
zepto	z	SI prefix	Prefix	10⁻²¹	-
yocto	y	SI prefix	Prefix	10⁻²⁴	-
ronto	r	SI prefix	Prefix	10⁻²⁷	-
quecto	q	SI prefix	Prefix	10⁻³⁰	-

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