Pressure is defined as:

SI unit of Pressure is $\frac{kg}{m{s}^2}$

SI unit of Momentum per unit area is $\frac{kg}{ms}$

SI unit of momentum per unit area per unit time is $\frac{kg}{m{s}^2}$

SI unit of Momentum per unit volume is $\frac{kg}{m^{2}s}$

SI unit of Energy per unit volume is $\frac{kg}{m{s}^2}$