Compression Ratio Calculator
All measurements required are in inches except "Head cc's" and "Piston Notch or Dome cc's". If the piston has a "Notch" or "Dished" top, enter the variable as a positive number. If the piston has a "Dome", enter the variable as a negative number (type a "-" sign in front of the number). If the piston is a flat top enter the number zero (0).