P = Hydrostatic pressure
ρ = Mass density of fluid in kilograms per cubic meter (metric) or slugs per cubic foot (British)
g = Acceleration of gravity
γ = Weight density of fluid in newtons per cubic meter (metric) or pounds per cubic foot (British)
h = Height of vertical fluid column above point of pressure measurement
For example, the pressure generated by a column of oil 12 feet high (h) having a weight density
of 40 pounds per cubic foot (γ) is: