SI Base Units meter (m) Length (L) Mass Time Electric Current (I) Temperature Name Speed of light Planck’s constant Avogadro’s # Gas Constant Kilogram (kg) Second (s) Ampere (A) Kelvin (K) Constants Value 3.000E8 6.626E-34 6.022E23 8.314 Symbol c h NA or L R Units m/s J*s mol-1 J/(K*mol) SI base unit Equivalents Quantity Name Symbol electric charge or quantity of electricity coulomb C electrical capacitance farad F electrical conductance siemens S electrical resistance ohm Ω energy, work, heat joule J force, weight frequency newton hertz N Hz magnetic field strength tesla T power watt W pressure pascal degree Celsius Pa s⋅A F⋅V C/V s/Ω 1/Ω A/V 1/S V/A N⋅m C⋅V W⋅s kg⋅m/s2 1/s V⋅s/m2 Wb/m2 N/(A⋅m) J/s V⋅A N/m2 °C K K volt V W/A J/C (kg⋅m2)/(s3⋅A) temperature relative to 273.15 K voltage, electrical potential difference, electromotive force Equivalents Base Units m/s (kg*m2)/s mol-1 (kg*m2)/ (s2*K*mol) s⋅A (s4*A2)/(kg*m2) (s3*A2)/(kg*m2) (kg*m2)/(s3*A2) (kg⋅m2)/s2 (kg⋅m)/s2 s-1 kg/(s2*A) (kg⋅m2)/s3 kg/(m⋅s2)