Hydraulic Pump Flow & Power Calculator

Inputs

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Volume pumped per revolution.
cm³
Drive speed of the pump shaft.
rpm
Working hydraulic pressure the pump runs against.
bar
Fraction of the geometric flow actually delivered (internal leakage loss).
Hydraulic power out ÷ shaft power in (volumetric × mechanical).

Results

Default result
Edit inputs
Output flow(Q)
24.84L/min

Geometric flow × volumetric efficiency.

Also computed

Hydraulic power6.624kW

Useful fluid power = Q × p.

Shaft power required7.793kW

Drive-motor input power.

Hydraulic power ÷ overall efficiency — size the drive motor to this.

Method notes 2 notes
  • Flow is geometric displacement × speed, reduced by the volumetric efficiency (internal leakage rises with pressure).
  • Hydraulic power uses the fluid-power shortcut kW = Q(L/min) × p(bar) ÷ 600; the shaft motor must supply that ÷ overall efficiency.

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