Hydraulic Tool Hub
Free hydraulic calculators, thread identification tools, O-ring sizing, hose sizing resources and reference charts for hydraulic fittings, hoses, pumps and flanges.
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Choose the tool that matches what you are trying to identify, size or calculate.
1. Hydraulic Thread Identifier
Identify BSPP, BSPT, JIC, ORFS, NPT, Metric, UNO and SAE hydraulic fittings.
2. O-Ring Size Identifier
Find AS568, Metric and BS O-ring sizes from standard measurements and dash sizes.
3. Hose Size Nomograph
Match flow rate, hose bore and recommended oil velocity.
4. Hydraulic Calculators
Calculate power, pump flow, motor speed, tank volume, cylinder force, velocity and hose size.
Hydraulic Calculators
Jump straight to the calculation you need.
Calculators
Enter your values below. These tools are intended as general guides only.
Power
Calculated at 100% efficiency. Formula: kW = pressure(bar) × flow(L/min) ÷ 600.
Pump Flow
Calculated at 100% volumetric efficiency. Formula: L/min = cc/rev × RPM ÷ 1000.
Motor Speed
Calculated at 100% volumetric efficiency. Formula: RPM = flow(L/min) × 1000 ÷ displacement(cc/rev).
Tank Volume
Rectangular formula: litres = L × W × H ÷ 1,000,000. Also shows an 80% working fill guide.
Gear Pump 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
Retract force allows for rod area.
Cylinder Speed
Approximate extend speed based on full bore area.
Hose 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
Pick the next available hose size above the calculated inside diameter.
Charts & Resources
Helpful hydraulic identification charts, hose sizing tools and calculators in one place.
Popular Resources
Quick links to the pages customers usually need when identifying hydraulic parts.
Coming Soon
More Hydraulic Konnect tools are on the way.
Still not sure?
Email us a photo of your fitting, thread, flange or old hose and we’ll help point you in the right direction.