The SI unit of P is m2/s2. Kinematic pressure is used in the same manner as kinematic viscosity 
  
    
      
        ν
      
    
    {\displaystyle \nu }
   in order to compute the Navier–Stokes equation without explicitly showing the density 
  
    
      
        
          ρ
          
            0
          
        
      
    
    {\displaystyle \rho _{0}}
  .
The pressure due to a liquid in liquid columns of constant density or at a depth within a substance is represented by the following formula:

  
    
      
        p
        =
        ρ
        g
        h
        ,
      
    
    {\displaystyle p=\rho gh,}
  where:

p is liquid pressure,
g is gravity at the surface of overlaying material,
ρ is density of liquid,
h is height of liquid column or depth within a substance.Another way of saying the same formula is the following:

  
    
      
        p
        =
        
          weight density
        
        ×
        
          depth
        
        . {\displaystyle p={\text{weight density}}\times {\text{depth}}.}