Physical Quantities

All the physical quantities can be expressed in terms of some combination of seven base quantities: Length [L], mass [M], time [T], electric current [I], thermodynamic temperature [K], luminous intensity [cd] and amount of substance [mol]. These base quantities are considered as the seven dimensions of the physical world.

After this there are two supplementary units, plane angle and solid angle. Unit of plane angle is radian and unit of solid angle is steradian.