The head of a pump can be expressed in metric units as:
head of pump = (p2 - p1)/(ρg) + (v22- v12)/(2g) + (z2-z1)
where,
h = total head developed (m)
p2 = pressure at outlet (N/m2)
p1 = pressure at inlet (N/m2)
ρ = density of liquid (kg/m3)
g = acceleration of gravity (9.81) m/s2
v2 = velocity at the outlet (m/s)
head of pump = (p2 - p1)/(ρg) + (v22- v12)/(2g) + (z2-z1)
where,
h = total head developed (m)
p2 = pressure at outlet (N/m2)
p1 = pressure at inlet (N/m2)
ρ = density of liquid (kg/m3)
g = acceleration of gravity (9.81) m/s2
v2 = velocity at the outlet (m/s)