Table 1.

International system of units

Quantity	Dimension	Unit	Symbol
Length	L	Meter	m
Mass	M	Kilogram	kg
Time	T	Second	s
Current	I	Ampere	A
Temperature	Θ	Kelvin	K
Amount of substance	N	Mole	mol
Luminous intensity	J	Candela	cd
Force	ML T−2	Newton	N
Pressure	ML− 1T− 2	Pascal	Pa
Work or energy	ML2T− 2	Joule	J
Power	ML2T− 3	Watt	W
Frequency	T− 1	Hertz	Hz

All other quantities can be derived from these base quantities such as flow = volume (length³) / time (L³T^-1) or hydraulic resistance = pressure/flow (ML⁻⁴T⁻¹)