SI-Derived Units

Physical QuantityNameSymbolExpressed in SI Base Units
frequencyhertzHzs-1
forcenewtonNm kg s-2
pressure, stresspascalPaN m-2 = m-1 kg s-2
energy, work, heatjouleJN m = m2 kg s-2
power, radiant fluxwattWJ s-1 = m2 kg s-3
electrical chargecoulombCA s
electrical potential, electromotive forcevoltVJ C-1 = m2 kg s-3 A-1
electrical resistanceohmΩV A-1 = m2 kg s-3 A-2
electric conductancesiemensSohm-1 = m-2 kg-1 s3 A2
electical capacitancefaradFC V-1 = m-2 kg-1 s4 A2
magnetic flux densityteslaTV s m-2 = kg s-2 A-1
magnetic fluxweberWbV s = m2 kg s-2 A-1
inductancehenryHV A-1 s = m2 kg s-2 A-2
luminous fluxlumenlmcd sr
illuminanceluxlxcd sr m-2
radioactive activitybecquerelbqs-1
absorbed dose of radiationgrayGyJ kg-1 = m2 s-2
dose equivalent of radiationsievertSvJ kg-1 = m2 s-2
plane angleradianrad1 m m-1
solid anglesteradiansr1 m2 m-2
areasquare metreAm2
volume cubic metreVm3
speed, velocitymetre per secondv m/s
accelerationmetre per second squareda m/s2
wavenumberreciprocal metreσm–1
density, mass densitykilogram per cubic metreρkg/m3
surface density kilogram per square metreρAkg/m2
specific volumecubic metre per kilogramvm3/kg
current densityampere per square metrejA/m2
magnetic field strengthampere per metreHA/m
concentrationmole per cubic metrecmol/m3
mass concentrationkilogram per cubic metreρ, γ kg/m3
luminancecandela per square metreLvcd/m2
refractive indexonen1
relative permeabilityoneµr1