Engine Displacement (Bore & Stroke) Calculator

Inputs

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Cylinder bore diameter.
mm
Piston stroke length.
mm
Number of cylinders (use 1 for a single cylinder or pump).

Results

Default result
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Total displacement
1,998cm³

≈ 2.00 L · 121.9 ci

Swept volume of all cylinders.

Also computed

Per cylinder499.6cm³

Bore/stroke ratioPass1

square (bore ≈ stroke)

Method notes 2 notes
  • Displacement is the swept volume only — it excludes the combustion-chamber volume (which sets the compression ratio).
  • The same formula gives the swept volume of a hydraulic cylinder or pump (use 1 cylinder).

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