Hydraulic Motor Speed Calculator
Calculate hydraulic motor speed from oil flow, motor displacement and volumetric efficiency.
Enter Motor Details
Formula
RPM = Flow (L/min) × 1000 ÷ Displacement (cc/rev)
Actual motor speed is then adjusted by the volumetric efficiency percentage.
Use 100% efficiency for theoretical speed. Use a lower value to estimate real-world motor speed.
Speed Results
Actual Motor Speed
— RPM
— RPM @ 100%
Theoretical Speed @ 100%
— RPM
Efficiency Used
— %
Flow Used
— L/min
US GPM
— GPM
Important Note
Actual hydraulic motor speed depends on motor type, load, pressure, leakage, oil viscosity, temperature, case drain flow and manufacturer specifications. This calculator is a general guide only.