This calculator provides the new clearance volume and the new compression ratio of the engine based on changes made. Changes can include a reduction in the gasket thickness or decking of heads or block.
| variable | description |
| bore | the bore diameter of the engine |
| stroke | the stroke length of the piston |
| compression ratio | the compression ratio of the engine |
| cylinders | the total number of cylinders |
| change | change in deck, head or gasket, expressed as +ve when added (ie thicker gasket) or -ve when material removed (ie block decked or thinner gasket) |
| cubic inches | the total cubic inches of displacement |
| old clearance volume | the original clearance volume per piston |
| new clearance volume | the new clearance volume per piston |
| new compression | the new compression ratio |
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