Free Static and Dynamic Engine Compression Ratio Calculator

Bore/Stroke: Physical dimensions of the cylinder.

Rod Length: Connecting rod length (center-to-center).

Chamber/Deck/Gasket: Volumes in cc/cubic inches.

IVC (Intake Valve Closing): Degrees After Bottom Dead Center (ABDC). Important for DCR.

Results: SCR is static ratio. DCR accounts for cylinder filling efficiency based on valve timing.

Engine Compression Calculator