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Engine Displacement Calculator
Calculate engine displacement in cubic centimeters (CC) and cubic inches from bore diameter, stroke length, and number of cylinders.
About This Calculator
Engine displacement is the total volume swept by all pistons in an engine and is the most common way to describe engine size — whether you're browsing car specs, ordering performance parts, or discussing power potential with a mechanic. Displacement is calculated from bore (cylinder diameter), stroke (piston travel distance), and the number of cylinders, but the formula and unit conversions between CC, liters, and cubic inches aren't exactly common knowledge. Our engine displacement calculator handles all the math, converting your measurements into every standard unit used worldwide.
The Formula Behind This Calculator
Displacement (cc) = pi * (Bore/2)² * Stroke * Cylinders Liters = cc / 1,000 Ci = cc / 16.387.
Understanding the math helps you verify results and make better decisions for your project.
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How to Use
- 1Enter the cylinder bore diameter in millimeters.
- 2Enter the stroke length in millimeters.
- 3Set the number of cylinders in the engine.
When to Use
- →Calculating displacement for an engine build or rebuild project.
- →Converting engine specifications between CC, liters, and cubic inches.
- →Estimating power potential from bore and stroke changes during an overbore.
Tips
- ✓An overbore of 0.030" (0.76mm) on a 4-cylinder engine adds about 2-3% displacement.
- ✓Square engines (bore = stroke) like many modern designs offer a good balance of torque and RPM capability.
- ✓Long-stroke (undersquare) engines produce more low-end torque; large-bore (oversquare) engines can rev higher.
FAQ
What is engine displacement?
Displacement is the total volume of all cylinders — the space swept by pistons moving from bottom dead center to top dead center. Larger displacement generally means more power potential.
How do I convert CC to cubic inches?
Multiply CC by 0.0610237 to get cubic inches. For example, 2000cc = 122 cubic inches. A classic 350 Chevy is 5,735cc.
Does more displacement mean more power?
Generally yes, but power also depends on compression ratio, airflow, fuel delivery, and forced induction. A turbocharged 2.0L can make more power than a naturally aspirated 5.0L.
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