Online Pump Power calculator.

## Pump Power Formulas:

**Imperial Units:**

P = (Q * H * SG) / (3960 * η)

where:

P = power, horse power.

H = head, ft.

Q = flow, gpm.

SG = specific gravity.

η= pump efficiency, decimal.

**SI Units:**

P = (Q * H * SG) / (367 * η)

where:

P = power, kW.

H = head, m.

Q = flow, m3/hr.

SG = specific gravity.

η= pump efficiency, decimal.