Hydraulic Motor Selection Calculator

Calculate hydraulic motor displacement, flow, torque, and power from speed and load requirements.

Required torque (ft·lb)

Required speed (RPM)

System pressure (PSI)

Back pressure (PSI)

Mechanical efficiency

Volumetric efficiency

Available flow (GPM, 0=unlimited)

Tab to move between fields

Motor displacement (in³/rev)

Calculated displacement (in³/rev)4.33

Required flow (GPM)11.76

Actual torque (ft·lb)173.1

Actual speed (RPM)500

Output power (HP)16.48

Input power (HP)20.59

Overall efficiency (%)80

Output Kw12.29

Drain Flow Gpm0.94

How to Use This Calculator

Enter Required torque (ft·lb), Required speed (RPM), and System pressure (PSI).
Set Back pressure (PSI), Mechanical efficiency, and Volumetric efficiency.
Adjust Available flow (GPM, 0=unlimited) as needed.
Review the Motor displacement (in³/rev) result.
Use Calculated displacement (in³/rev) and Required flow (GPM) to inform your decision.

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