Formula
Mathematically:

  
    
      
        p
        =
        
          
            F
            A
          
        
        ,
      
    
    {\displaystyle p={\frac {F}{A}},}
  where:

  
    
      
        p
      
    
    {\displaystyle p}
   is the pressure,

  
    
      
        F
      
    
    {\displaystyle F}
   is the magnitude of the normal force,

  
    
      
        A
      
    
    {\displaystyle A}
   is the area of the surface on contact.Pressure is a scalar quantity.
Mathematically, it is described by Bernoullis equation, where velocity head is zero and comparisons per unit volume in the vessel are

  
    
      
        
          
            p
            γ
          
        
        +
        z
        =
        
          c
          o
          n
          s
          t
        
        . {\displaystyle {\frac {p}{\gamma }}+z=\mathrm {const} .} Terms have the same meaning as in section Fluid pressure. Direction of liquid pressure
An experimentally determined fact about liquid pressure is that it is exerted equally in all directions. If someone is submerged in water, no matter which way that person tilts their head, the person will feel the same amount of water pressure on their ears.