Hydraulic Power Pack Manufacturer · Talwade, Pune · Since 1991

Free engineering tools

Hydraulic Power Pack Calculators

Four quick tools for sizing a hydraulic power pack — pump flow, motor power, reservoir volume and cylinder force. Everything runs in your browser, and the formula is shown so you can check the working. For a full recommended configuration, use the HPU Configurator.

1 Pump Flow Calculator

Theoretical flow delivered by a fixed-displacement pump at a given speed.

Q (L/min) = (Vg [cc/rev] × n [rpm] × ηv) / 1000

Typical 90–95% for gear pumps.
delivered flow at the pump outlet

2 Motor Power Calculator

Electric motor power needed to drive the pump at a working pressure and flow.

Motor kW = (P [bar] × Q [L/min]) / (600 × ηo)

Pump + drive losses. 80–88% typical.
kW required
HP (≈ kW / 0.746)

3 Tank / Reservoir Size Calculator

Reservoir volume by the common rule of thumb (3–5× pump flow per minute).

Tank (L) = k × Q [L/min]  ( k = 3 to 5 )

3× compact; 5× runs cooler for continuous duty.
at your k
3× – 5× range

4 Cylinder Pressure / Force Calculator

Push and pull force a cylinder develops at a given pressure.

F = P × A  •  Abore = π/4 × D²  •  Aannulus = π/4 × (D² − d²)
push force (full bore)
pull force (rod side)

Please note

These calculators give preliminary engineering guidance only. Real systems involve duty cycle, oil viscosity, temperature, line losses, safety margins and component tolerances. Always have the final system selection verified by a qualified engineer — or let our team confirm it for you.

Learn the method

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