Pump Displacement Calculator

Calculate required pump displacement from desired flow rate and operating speed.

Input Parameters

Results

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Required Displacement
in³/rev
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Displacement
cc/rev
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Flow Per Pump
GPM
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Shaft Speed
rad/s
Note: Standard displacement sizes: 0.5, 1.0, 1.5, 2.0, 3.0, 4.0 in³/rev. Select next larger standard size.

Reference

Displacement = (Q × 231) / (RPM × η_vol) Disp (cc) = Disp (in³) × 16.387 Flow/Pump = Total Flow / Number of Pumps Shaft Speed = RPM × 2π / 60