Cars & Vehicles
Engine displacement calculator
Bore, stroke and cylinders → displacement in cc and liters.
- Instant
- Free
- Private (processed locally)
- No sign-up
Calculate an engine’s displacement
Enter the bore, the stroke and the number of cylinders. The tool gives the total displacement in cc and liters.
The formula
- Per cylinder = (π/4) × bore² × stroke
- Total = per cylinder × cylinders
- In mm then ÷ 1000 = cc
- 1 liter = 1000 cc
Example
| Input | Value |
|---|---|
| Bore | 81 mm |
| Stroke | 86.4 mm |
| Cylinders | 4 |
| Displacement | ≈ 1781 cc (1.78 L) |
100% local calculation, no data sent.
Frequently asked questions
What is the displacement formula?
Displacement = (π/4) × bore² × stroke × number of cylinders. With bore and stroke in mm, divide by 1000 for cc.
Bore vs stroke?
The bore is the cylinder diameter; the stroke is the distance the piston travels between top and bottom dead center.
Why convert to liters?
Engines are often named in liters (1.8 L): 1 liter = 1000 cc. The tool gives both.
Per-cylinder displacement?
It is the volume of a single cylinder; times the number of cylinders gives the total displacement.