Input 1 for inch, or 2 for mm 
Enter Bore Size                            Bore/Stroke Ratio (B/S)  :1
Enter Stroke size                          Rod/Stroke Ratio (R/S)  :1
Enter Number of cylinders 
Enter Rod Length   




Engine Size
CI (Cubic Inches)               
CC (Cubic CM)

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Calculate CI (Engine Size) from Bore, Stroke, and Number of cylinders
Calculate Bore from Engine Size, Stroke, and Number of cylinders
Calculate Stroke from Engine Size, Bore, and Number of cylinders
Calculate Rod Stroke Ratio from Stroke and Rod Length