Formula
Displacement is the fundamental measure of engine size, representing the volume of air/fuel mixture drawn into the engine during one complete cycle.
Worked Example
This calculator provides estimates based on standard mathematical formulas. Real-world results will vary based on mechanical condition, environmental factors, and other variables.
Frequently Asked Questions
Divide cubic inches by 61.02. For example, 350 ci ÷ 61.02 ≈ 5.7 Liters.
Divide cubic centimeters by 1000 for liters, or by 16.387 for cubic inches. A 1998 cc engine is about 2.0 L or 122 cubic inches.
Bore has a squared effect (it's the radius squared in the formula), so increasing bore raises displacement faster than the same increase in stroke.
A larger bore suits high-RPM power and bigger valves; a longer stroke builds low-end torque. Engine character depends on the bore-to-stroke ratio.
Displacement sets how much air and fuel the engine can move per cycle. More displacement generally means more potential power, though airflow and tuning decide how much is realized.