CID Calculator
Calculate engine cubic inch displacement from bore, stroke, and cylinder count. Convert between CID and liters for any engine configuration.
Step 1: Engine Dimensions
Understanding Engine Displacement
Engine displacement is calculated using the formula: CID = (π/4) × Bore² × Stroke × Number of Cylinders. This represents the total volume of all the cylinders in an engine, indicating the engine’s size and potential power output.
Step 2: Calculation Options
About Engine Displacement
Cubic Inch Displacement (CID) is a measurement of an engine’s cylinder volume. Larger displacement engines typically produce more power but consume more fuel. Common engine sizes range from small 4-cylinder engines (around 100-160 CID) to large V8 engines (350-454 CID or more).
Engine Displacement Results
Calculated Engine Displacement
Common Engine Displacement Comparison
| Engine Type | CID | Liters | Cylinders |
|---|
Displacement Breakdown
CID Calculation Formula
CID = (π/4) × Bore² × Stroke × Number of Cylinders
To calculate cubic inch displacement, multiply the area of the cylinder bore (π/4 × bore²) by the stroke length, then multiply by the number of cylinders. For example: Bore = 4.0″, Stroke = 3.48″, 6 cylinders = (0.7854 × 16) × 3.48 × 6 = 262.5 CID.
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