Displacement Calculator

Formula to figure engine cc displacement;
      ( multiply 3.142 x radius of bore mm squared x stroke length mm divided by 1000. )

To figure displacement for this example:  47mm bore x 38mm stroke;

Bore diameter divided by 2 = 23.5 mm radius 
To square radius multiply 23.5mm x 23.5mm = 552.25 radius mm squared
552.25mm x 3.142 = 1735.17mm
1735.17mm x 38mm = 65936 cubic milliliters;
To get cubic centimeter divide 65936 by 1000 = 65.936cc or round off to 66cc

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