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.

NameSymbolQuantityEquivalentsSI Base Unit
Equivalents
hertzHzfrequency1/ss−1
radianradanglem/m1
steradiansrsolid anglem2/m21
newtonNforce ,  weightkg⋅m/s2kg⋅m⋅s−2
pascalPapressure ,  stressN/m2kg⋅m−1⋅s−2
jouleJenergy ,  work ,  heatm⋅N, C⋅V, W⋅skg⋅m2⋅s−2
wattWpower ,  radiant fluxJ/s, V⋅Akg⋅m2⋅s−3
coulombCelectric charge  or  quantity of electricitys⋅A, F⋅Vs⋅A
voltVvoltage ,  electrical potential difference ,  electromotive forceW/A, J/Ckg⋅m2⋅s−3⋅A−1
faradFelectrical capacitanceC/V, s/Ωkg−1⋅m−2⋅s4⋅A2
ohmΩelectrical resistance ,  impedance ,  reactance1/S, V/Akg⋅m2⋅s−3⋅A−2
siemensSelectrical conductance1/Ω, A/Vkg−1⋅m−2⋅s3⋅A2
weberWbmagnetic fluxJ/A, T⋅m2,V⋅skg⋅m2⋅s−2⋅A−1
teslaTmagnetic induction ,  magnetic flux densityV⋅s/m2, Wb/m2, N/(A⋅m)kg⋅s−2⋅A−1
henryHelectrical inductanceV⋅s/A, Ω⋅s, Wb/Akg⋅m2⋅s−2⋅A−2
degree Celsius°Ctemperature  relative to  273.15 KKK
lumenlmluminous fluxcd⋅srcd
luxlxilluminancelm/m2cd⋅m−2
becquerelBqradioactivity  (decays per unit time)1/ss−1
grayGyabsorbed dose  (of  ionizing radiation )J/kgm2⋅s−2
sievertSvequivalent dose  (of  ionizing radiation )J/kgm2⋅s−2
katalkatcatalytic activitymol/ss−1⋅mol.

The 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".

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This particular version was published on 29-Nov-2024 16:16 by -jim.Top