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