Engine Displacement Calculator

Find your engine's total and per-cylinder displacement from bore, stroke, and cylinder count.

How to use

  1. Enter your values in the fields above.
  2. Press Calculate to see your result instantly.
  3. Use the Share button to copy a link to your result.

About this calculator

This calculator finds an engine's displacement — the total volume swept by all its pistons — using the cylinder volume formula V = π/4 × bore² × stroke × number of cylinders, reporting the result in cubic centimeters, liters, and per-cylinder volume.

Automotive enthusiasts and engine builders use it to compare or verify an engine's size from its bore and stroke specs, especially after a rebuild with different pistons, and it's a routine calculation in automotive engineering coursework. Enter the bore and stroke in millimeters plus the cylinder count to get the total.

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