Online Pump Head calculator.

## Pump Head Formulas:

**Imperial Units:**

H = (2.31 ( Pd – Ps) / SG) + (Vd^{2 }– Vs^{2}) / 2g + (Zd – Zs) – Hf

where:

H = pump head, ft.

Hf = friction loss, ft.

PS = suction pressure, psia.

Pd = discharge pressure, psia.

SG = specific gravity.

Vs = suction velocity, ft/s.

Vd = discharge velocity, ft/s.

Zs = suction height from reference, ft.

Zd = discharge head from reference, ft.

g = gravitational constant, 32.2 ft/s^{2}.

**SI Units:**

H = (10.2 ( Pd – Ps) / SG) + (Vd^{2 }– Vs^{2}) / 2g + (Zd – Zs) – Hf

where:

H = pump head, m.

Hf = friction loss, m.

PS = suction pressure, bar.

Pd = discharge pressure, bar.

SG = specific gravity.

Vs = suction velocity, m/s.

Vd = discharge velocity, m/s.

Zs = suction height from reference, m.

Zd = Discharge head from reference, m.

g = gravitational constant, 9.81 m/s.