Engine Cylinder Volume Calculator
Engine displacement uses Displacement = pi over 4 times bore squared times stroke times cylinder count. A 4-cylinder engine with 85 mm (8.5 cm) bore and 88 mm (8.8 cm) stroke has a displacement of 1,997.43 cc, or 1.997 litres (121.89 cu in). Enter bore, stroke, and cylinder count below.
Calculator
Engine cylinder displacement visualization
Piston bore and stroke displacement
This tool computes engine displacement from bore, stroke, and cylinder count. It outputs volume in cc, litres, and cubic inches.
Single cylinder and total engine cc formulas
Displacement is calculated as Displacement = (pi / 4) times bore squared times stroke times cylinder count. Swept volume is the piston travel space.
Frequently Asked Questions
How do you calculate engine displacement manually?
Calculate one cylinder's volume using (π / 4) × bore² × stroke. Then multiply by the number of cylinders.
What is the difference between CCs and Liters in an engine?
They are the same measurement in different units. There are 1,000 cubic centimeters (cc) in one litre.
What does boring out an engine mean?
It means machining the cylinder walls to increase bore diameter, expanding displacement and airflow.
What does swept volume mean?
Swept volume is the cylinder volume between Top Dead Center (TDC) and Bottom Dead Center (BDC).
Is larger engine displacement always faster?
Not necessarily. Forced induction like turbocharging can compress more air and fuel into a smaller displacement.
How do you calculate the swept volume of a cylinder?
To compute the swept volume of a cylinder (commonly used in engine displacement calculations): (1) Divide the bore diameter by 2 to get the bore radius. (2) Square the bore radius. (3) Multiply the squared radius by Pi (π). (4) Multiply the result by the stroke length (distance the piston travels). The swept volume formula is: V = π × (bore/2)² × stroke. Confirm the bore and stroke use the same units.