Engine Displacement Calculator

Bore × stroke × cylinders → displacement in cc, litres and cubic inches.

How it works

1

Measure bore & stroke

Bore is the cylinder diameter, stroke is the piston travel — both in millimetres.

2

Add cylinder count

Enter how many cylinders the engine has.

3

Read displacement

Total displacement is shown in cc, litres and cubic inches.

Frequently asked questions

How is engine displacement calculated?

Displacement = π/4 × bore² × stroke × number of cylinders. With bore and stroke in millimetres the result is in cubic millimetres; divide by 1000 for cc.

What is the difference between cc and litres?

1000 cc = 1.0 litre. A 1984 cc engine is marketed as 2.0 L.

How do I convert cc to cubic inches?

Divide cc by 16.387. For example 1984 cc ≈ 121 ci.

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