Compression Ratio Calculator

Compression Ratio Calculator

Bore (mm)

Please enter a positive number.

Stroke (mm)

Please enter a positive number.

Head Gasket Thickness (mm)

Please enter a non-negative number.

Deck Height (mm)

Please enter a number (can be negative).

Piston Dome (+) / Dish (-) Volume (cc)

Please enter a number.

Combustion Chamber Volume (cc)

Please enter a positive number.

Compression Ratio: :1

Swept Volume: cc | Clearance Volume: cc

Formula: CR = (Swept Volume + Clearance Volume) / Clearance Volume

Swept Volume = π/4 × Bore² × Stroke (converted to cc)

Clearance Volume = Gasket Volume + Deck Volume + Piston Volume + Chamber Volume

Please correct the highlighted inputs.