Engine Displacement Calculator
Calculate total swept volume from bore, stroke and cylinder count.
Formula
V = π × bore² × stroke × cylinders / 4
Bore diameter: 80 mm · Piston stroke: 80 mm · Displacement (cm³) ≈ pi×(80 mm × 0.001 m/mm)^2×(80 mm × 0.001 m/mm)×(4)×250000 · Displacement (L) ≈ (1,608.495439)÷1000
How to use
- Enter the cylinder bore diameter.
- Enter piston stroke and cylinder count.
- Read total displacement in cm³ and liters.
Examples
- Four cylinders with 80 mm bore and stroke displace 1608.495 cm³.
Frequently asked questions
Does it include the combustion chamber?
No. Displacement is swept volume, excluding clearance volume.
Must cylinders have the same dimensions?
Yes. For different sizes, calculate each group separately and add them.
Does displacement determine horsepower?
No. Speed, airflow, combustion and efficiency also matter.
Sources
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