Two other units are widely used
1 bar = 105 Pa = 100 kPa = 0.1 MPa
and the standard atmosphere, where
1 atm = 101.325 kPa = 1.01325 bar = pressure exerted by a columan of 760 mm of Hg
Energy is the capacity to exert a force through a distance. In SI, the unit of energy is Newtonmeter, N m or Joule, J.
The rate of energy transfer or storage is called power. The unit of power is watt, W.
1 W = 1 J/s = 1 N m/s and 1 kW = 1000 W.
Apart from these,
units are used for Frequency, Hertz = Hz = s-1
Electric current, Ampere = A
Electric charge, Coulomb, C = As
Electric potential, Volt = V = W/A
Magnetic flux, Weber, Wb = Vs
Magnetic flux density, Tesla, T = Wb/m2