Calculators by unit

Whether your bore and stroke are in millimetres or inches, and whether you think in cc, litres or cubic inches, these tools speak your unit. Each one runs the same audited displacement core and shows every unit in the result, so you can enter what you have and read what you need. The converter handles values you already know; the cc and cubic-inch calculators work from raw bore and stroke. The distinction between the two calculators is only the unit they lead with — cc for metric measurements, cubic inches for imperial — because the underlying formula, cylinders × π/4 × bore² × stroke, is identical either way. That is worth remembering: a metric build and an American V8 are the same geometry problem in different clothes, and switching a tool's unit toggle converts the number you typed rather than merely relabelling it, so nothing is lost in translation. Pick whichever tool matches the numbers in front of you.

Looking for something else? The full calculators directory lists every tool, or start from the main displacement calculator.