LDAPWiki: SI Derived Unit

Overview#

SI Derived Units are units of measurement derived from the seven SI Base Units specified by the International System of Units (SI) and are either dimensionless or can be expressed as a product of one or more of the SI Base Units, possibly scaled by an appropriate power of exponentiation.SI Derived Unit are defined with specific names for 22 of these units.

Name	Symbol	Quantity	Equivalents	SI Base Unit Equivalents
hertz	Hz	frequency	1/s	s−1
radian	rad	angle	m/m	1
steradian	sr	solid angle	m2/m2	1
newton	N	force , weight	kg⋅m/s2	kg⋅m⋅s−2
pascal	Pa	pressure , stress	N/m2	kg⋅m−1⋅s−2
joule	J	energy , work , heat	m⋅N, C⋅V, W⋅s	kg⋅m2⋅s−2
watt	W	power , radiant flux	J/s, V⋅A	kg⋅m2⋅s−3
coulomb	C	electric charge or quantity of electricity	s⋅A, F⋅V	s⋅A
volt	V	voltage , electrical potential difference , electromotive force	W/A, J/C	kg⋅m2⋅s−3⋅A−1
farad	F	electrical capacitance	C/V, s/Ω	kg−1⋅m−2⋅s4⋅A2
ohm	Ω	electrical resistance , impedance , reactance	1/S, V/A	kg⋅m2⋅s−3⋅A−2
siemens	S	electrical conductance	1/Ω, A/V	kg−1⋅m−2⋅s3⋅A2
weber	Wb	magnetic flux	J/A, T⋅m2,V⋅s	kg⋅m2⋅s−2⋅A−1
tesla	T	magnetic induction , magnetic flux density	V⋅s/m2, Wb/m2, N/(A⋅m)	kg⋅s−2⋅A−1
henry	H	electrical inductance	V⋅s/A, Ω⋅s, Wb/A	kg⋅m2⋅s−2⋅A−2
degree Celsius	°C	temperature relative to 273.15 K	K	K
lumen	lm	luminous flux	cd⋅sr	cd
lux	lx	illuminance	lm/m2	cd⋅m−2
becquerel	Bq	radioactivity (decays per unit time)	1/s	s−1
gray	Gy	absorbed dose (of ionizing radiation )	J/kg	m2⋅s−2
sievert	Sv	equivalent dose (of ionizing radiation )	J/kg	m2⋅s−2
katal	kat	catalytic activity	mol/s	s−1⋅mol.

names of SI Derived Units, when written in full, are always in Lowercase. However, the symbols for units named after persons are written with an uppercase initial letter. For example, the symbol for hertz is "Hz", but the symbol for meter is "m".

More Information#

There might be more information for this subject on one of the following:

SI Defining Constants

[#1] - SI_derived_unit - based on information obtained 2022-05-27