Hydraulic Calculators
Fast trade calculators for hydraulic power, pump flow, gear pump displacement, cylinder force, cylinder speed, hose velocity and hose sizing.
Power
Power Required—
Calculated at 100% efficiency. Formula: kW = pressure(bar) × flow(L/min) ÷ 600.
Pump Flow
Pump Flow—
Calculated at 100% volumetric efficiency. Formula: L/min = cc/rev × RPM ÷ 1000.
Gear Pump Displacement
Approx. Displacement—
Measure the gear pump dimensions as shown above for approximate gear pump displacement calculation. Formula: cc/rev = 0.000262 × W × (2L − D) × D.
Cylinder Force
Extend / Retract Force—
Retract force allows for rod area.
Cylinder Speed
Extend Speed / Time—
Approximate extend speed based on full bore area.
Hose Velocity
Oil Velocity—
General guide: suction 0.5–1.0 m/s, return 1.0–2.0 m/s, pressure 2.0–4.5 m/s.
Hose Size
Minimum Hose ID—
Pick the next available hose size above the calculated inside diameter.