Units Basic units of the SI Magnitude Name Symbol Length meter m Mass kilogram kg Time second s Electric current amper A Thermodynamic temperature kelvin K Quantity of substance mol mol Luminous intensity candela cd Units derived from SI Magnitude Name Symbol Plane angle radian rad Solid angle steradian sr Frequency hertz Hz Force newton N Pressure, strain pascal Pa Energy, work, quantity of heat joule J Power, radiant flux watt W Electric potential difference, electromotive force volt V Capacitance farad F Electrical resistance ohm Electrical charge coulomb C Electrical conductivity siemens S Magnetic flux weber Wb Magnetic flux density tesla T Inductance henry H Luminous flux lumen lm Illuminance lux lx Radioactivity becquerel Bq Absorbed dose gray Gy Equivalent dose sievert Sv Catalytic activity katal Kat Units from other systems Magnitude Name Symbol Time hour h Time minute min Volume liter l Pressure, strain bar b Table of Contents Basic units of the SI Units derived from SI Units from other systems