# How do you calculate the power of a centrifugal pump?

Power is required by every machine, in order to move and work. Similarly, the centrifugal pump also requires power to move and increase the pressure of a fluid. This power depends on a number of factors, including the pump and motor efficiency, the differential pressure and the fluid density, as well as the viscosity and flow rate.

The power of a centrifugal pump can be calculated via the following 3-phase power equation:

**P (in Hp) = VI(1.7c) = Rated Voltage x Rated Current x 1.73/ %Efficiency**

Alternately, the power required to operate the pump should be stated in Hp (horsepower) on the pump's nameplate.

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