Find engine displacement from bore, stroke and cylinder count — in cc, litres and cubic inches.
How this calculator arrives at its answer
Engine displacement is the total volume swept by all the pistons. Enter the bore, stroke and number of cylinders and this calculator returns the displacement in cc, litres and cubic inches.
It’s the number behind a “2.0-litre” or “350 cubic inch” engine.
Try it with these numbers
On the values this calculator opens with, the displacement is 1,998.2. Underneath, Litres comes out at 2 L and Cubic inches at 121.9 ci. Change any field and every figure updates as you type.
Using the calculator
- Enter the bore and stroke in millimetres.
- Enter the number of cylinders.
- Read the displacement in cc, litres and cubic inches.
The maths behind it
displacement = π/4 × bore² × stroke × cylinders
FAQ
What is engine displacement?
The combined volume the pistons sweep in one cycle — a rough guide to an engine’s size and potential power.
How do I convert cc to litres?
Divide by 1,000. A 1,998 cc engine is about 2.0 litres.
What’s bore and stroke?
Bore is the cylinder diameter; stroke is how far the piston travels. Both set the displacement.