Pump Horsepower Calculator
Estimate hydraulic pump power, required motor input, standard horsepower size, daily energy and operating cost from flow, head and efficiency.
Default project preview
1.5 hp
Hydraulic power
0.6 kW
Pump input power
0.93 kW
Reserved power
1.07 kW
Daily electricity
3.71 kWh
Calculator
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Enter the project details and calculate a rounded material estimate.
Methodology
Transparent calculation
BuildMeter converts every input to a consistent internal unit, applies the selected allowance, and rounds products up to whole purchasable units.
Hydraulic power = density × gravity × flow × head. Input power divides by efficiency. Motor reserve is applied before rounding up to a common horsepower size.
FAQ
Pump Horsepower Calculator questions
Why is motor power higher than hydraulic power?+
Pump and motor losses mean more input power is required than the useful power delivered to the water.
Can horsepower alone select a pump?+
No. The pump curve must meet both design flow and total dynamic head with acceptable efficiency and suction conditions.
What is total dynamic head?+
It combines static lift, required discharge pressure and friction losses at the design flow.