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Calculate Engine's Compression Ratio (CR)

Calculate CR from ALL inputs except Total Volume
Calculate Total Volume from Bore, Stroke, and CR -- this is the volume measured with piston ATDC and the head with gasket installed, and valves closed
Calculate Combustion Chamber Volume from ALL inputs except Combustion Chamber Volume and Total Volume
Enter Input Unit Type 1=inches 2=mm :
Enter Bore size: Enter Stroke size:
Enter Head Gasket Bore size: and Compressed Gasket Thickness:
Enter Combustion Chamber Volume in CC's:
Enter Piston Dome Volume in CC's use "-" for Dished Pistons:
Enter Piston Deck Clearance    If ABOVE deck use "-" :

Compression Ratio: :1                 Total Volume: cc

Automotive Calculators are for estimated use only and cannot be guaranteed.
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