When pressure is given in length units, they should strictly be calling it ‘pressure head’. In case you don’t know the term, pressure below the surface of a liquid can be calculated by the formula
p = rho.g.h
Where p = pressure (Pa), rho is the density of the fluid (kg/m^3) and h is the depth below the surface (m). h is the pressure head.
Thus when people use pressure with units of psi or Pa, they are referring to p; and when they use pressure with units of m or ft, they are referring to h.
You can use the equation to convert between p and h using the formula above