Calculate Engine's Compression Ratio (CR)



Get accurate compression without the guesswork!


Get your engine's optimal compression ratio and total displacement in no time flat! Just complete your engine setup, click calculate, and you’re on your way to maximum performance.

Bore: (diameter)
Stroke:
Cylinder Head Volume:
Effective Dome Volume:
Use (-) for Dome and (+) for Dish.
Deck Clearance:
Compressed Gasket Thickness:
Number of Cylinders:
Compression Ratio : 
 
Total Displacement (in.3) : 
 
Total Displacement cc's :