Engine Displacement Calculator
Calculate engine displacement in cc and liters from bore, stroke, and cylinder count.
Engine displacement is the total volume swept by all pistons during one complete engine cycle. It is one of the most important specifications for comparing engines and is directly related to power output and fuel consumption.
The formula uses the cylinder bore (diameter) and stroke (travel distance): Displacement = (PI / 4) x Bore² x Stroke x Number of Cylinders. The result in cubic millimeters is divided by 1000 to get cubic centimeters (cc) or by 1,000,000 for liters.
A 2.0-liter four-cylinder engine might have an 86 mm bore and 86 mm stroke (called a "square" engine). Oversquare engines (bore larger than stroke) typically rev higher, while undersquare engines produce more low-end torque.