Engine Size Calculator
Calculate engine displacement in cubic centimeters (cc) or cubic inches (ci) based on bore, stroke, and number of cylinders.
Published by:
isCalculator Editorial Team
Was this calculator helpful?
How to use this tool?
This calculator computes an engine's displacement in cubic centimeters (cc) using bore, stroke, and cylinder count.
- Enter Bore (mm): The cylinder diameter in millimeters (e.g., 86).
- Enter Stroke (mm): The piston travel distance in millimeters (e.g., 86).
- Enter Number of Cylinders: A positive integer (e.g., 4).
- Click "Calculate": The result appears below in cc.
Formula: Displacement = (π/4) × Bore² × Stroke × Cylinders. All inputs must be in millimeters; result is in cc (1 cc = 1 cm³).
Note: Invalid inputs (negative, zero, or non-numeric) trigger red error highlights. Correct them to proceed.
Previous Results
| Result | Inputs | Date |
|---|
Frequently Asked Questions
Engine displacement is the total volume swept by all pistons inside the cylinders, usually measured in cubic centimeters (cc) or liters.
Displacement = (π/4) × bore² × stroke × number of cylinders. Bore and stroke must be in the same units.
Displacement is a key factor in determining engine power and efficiency; larger displacement generally means more power.