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Hydraulic Gear Pump Displacement Calculator

Hydraulic Gear Pump Displacement Calculator

Estimate hydraulic gear pump displacement from measured gear diameter, gear width and chamber length.

Enter Gear Pump Measurements

Gear pump displacement measurement guide showing gear diameter, gear width and chamber length

Measure the gear pump dimensions as shown in the guide image. This calculator uses the same gear pump displacement calculation method as the updated Tool Hub calculator.

Displacement Results

Approximate Displacement — cc/rev — in³/rev
L − D — mm
2D − L —
Important Note This is an approximate measurement-based calculation only. Gear tooth form, internal clearances, pressure plates, wear, pump design and manufacturer data can affect actual displacement.

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