Hydraulic Motor Power Calculator

Hydraulic Motor Power Calculator

Enter hydraulic load (pressure & flow) to estimate the electrical motor power required. Works with Metric (bar, L/min) and Imperial (psi, GPM). Includes efficiency losses, service factor, voltage-based current estimate, and Innotec model suggestions.

✔ P = p·Q with conversions
✔ Efficiency & service factor included
Multiplier on required motor kW for headroom (startup/transients). Default 1.15.
bar
L/min
Volumetric × mechanical, typical 80–90%
Electric machine efficiency
Controller conduction + switching losses

Results

Hydraulic Power

— kW
— HP

Electrical Power Required (incl. efficiencies)

— kW
— HP

Recommended Motor Continuous Rating

— kW Select voltage below
Applies service factor for headroom; pick a catalog model at or above this value.
Selecting a voltage enables rough current estimates and model suggestions.
— A
I ≈ P (kW) × 1000 ÷ V (V)

Suggested Innotec Models

Request a Quote
Suggestions are approximate; verify torque, speed, duty cycle, and cooling with engineering.
Formulas:
  • Hydraulic power (kW) = Pressure(bar) × Flow(L/min) ÷ 600
  • Hydraulic power (HP) = Pressure(psi) × Flow(GPM) ÷ 1714
  • Electrical power = Hydraulic power ÷ (pumpEff × motorEff × driveEff) (efficiencies as fractions)
  • Current ≈ P(kW) × 1000 ÷ V(Volts)

This hydraulic motor power calculator lets you convert hydraulic load (pressure + flow) into the electric motor continuous power required to drive a hydraulic pump. Enter bar and L/min or psi and GPM to instantly calculate the kW rating needed, including pump, motor, and controller efficiency losses. Ideal for sizing BLDC and IPM motors for hydraulic systems, power packs, EV hydraulic pumps, off-grid systems, and mobile machinery.

Hydraulic Motor Power Calculator

Enter hydraulic pressure and flow to estimate the required electric motor continuous rating (kW) for your hydraulic pump. Works with Metric (bar, L/min) and Imperial (psi, GPM).

✔ Uses hydraulic P = p · Q
✔ Includes pump, motor & controller efficiency + service factor
Headroom multiplier for starts, transients & heat. Default 1.15.
bar
L/min
Typical hydraulic pump overall efficiency ~75–85%
BLDC/IPM motor efficiency
Typical modern controller ~95%

Result

Recommended Motor Continuous Rating

— kW Select voltage below
Includes hydraulic load, pump/motor/controller efficiency and service factor. Choose a catalog motor at or above this kW rating.
Selecting a voltage enables an approximate current estimate and Innotec model suggestions.
— A
Formula: I ≈ P (kW) × 1000 ÷ V (Volts)

Suggested Innotec Models

Request a Quote
Suggestions are approximate. Please confirm torque, speed, duty cycle, and cooling with Innotec engineering.
Formulas used (internally):
  • Hydraulic power (kW) = Pressure(bar) × Flow(L/min) ÷ 600
  • Hydraulic power (HP) = Pressure(psi) × Flow(GPM) ÷ 1714
  • Electrical input power = Hydraulic power ÷ (pumpEff × motorEff × driveEff)
  • Recommended kW = Electrical input power × Service Factor
  • Current ≈ P(kW) × 1000 ÷ V(Volts)

Frequently Asked Questions

Hydraulic power in kilowatts is calculated as Pressure (bar) × Flow (L/min) ÷ 600. This formula converts hydraulic energy into shaft power required to drive a hydraulic pump.

Hydraulic horsepower is calculated using the formula Pressure (psi) × Flow (GPM) ÷ 1714. This is the standard formula used in hydraulic system sizing when working with imperial units.

The required electric motor power depends on hydraulic power and total system efficiency. The calculator factors in pump efficiency, electric motor efficiency, controller efficiency, and a service factor to determine the recommended continuous motor rating in kW.

Yes. The calculator accepts pressure and flow in either metric (bar and L/min) or imperial (psi and GPM) units and automatically applies the correct hydraulic power formula.

Yes. The calculator incorporates pump efficiency, motor efficiency, and controller efficiency, as well as an adjustable service factor to ensure the recommended kW rating reflects real-world operating conditions.