Engine Displacement Calculator
Calculate total engine displacement in cubic inches (CID) and liters. Discover engine sizes for performance tuning and comparison.
Calculate Displacement
What is Engine Displacement?
Displacement is literally how much air your engine sucks in. A 350 cubic inch engine draws in 350 cubic inches of air-fuel mix per full cycle. That's it. Bigger engines generally make more power because they combust more fuel each cycle.
Classic Chevy 350? That's got a 4.00-inch bore and 3.48-inch stroke. Plug those into the formula with 8 cylinders and you get 349.8 cubic inches. Close enough to call it a 350. Displacement is the baseline for everything—fuel consumption, power potential, emission ratings, all of it.
Oversquare vs Undersquare
Oversquare engines have wider bore than stroke (bore bigger than stroke). They rev higher and love RPMs—typical in sports cars. Undersquare engines are taller (stroke longer than bore) and build torque low—you'll see these in trucks and industrial stuff. Square engines are equal bore and stroke, balanced for both.
Displacement Examples You Know
Chevy small-block 350 is the legend. Big-block 454 for towing or boats. Ford's 289 and 302 are Mustang icons. Modern stuff? A 2.0-liter turbo makes similar power to a naturally aspirated 3.5-liter because of the boost. Displacement alone doesn't tell the whole story anymore.
Popular Engines and Actual Displacements
| Engine | CID | Liters | Where You'd See It |
|---|---|---|---|
| Chevrolet Small-Block 350 | 350 | 5.7 | Corvettes, Camaros, hot rods |
| Chevrolet Big-Block 454 | 454 | 7.4 | Trucks, boats, towing |
| Chevrolet Big-Block 427 | 427 | 7.0 | Performance and race engines |
| Ford 289/302 | 289 | 4.7 | Classic and modern Mustangs |
| Ford 351W | 351 | 5.8 | Mustangs, trucks |
| Dodge 383/440 | 383 | 6.3 | Challengers, Coronets |
| Dodge 426 Hemi | 426 | 7.0 | Mopar legends, drag racing |
| Ford Coyote 5.0L | 302 | 5.0 | Current generation Mustang |
| GM LS3 6.2L | 376 | 6.2 | Corvettes, Camaro SS |
| Turbo 2.0L | 122 | 2.0 | Economy cars with attitude |
Calculating Displacement
The formula: displacement = (π/4) × bore² × stroke × cylinders. Sound complicated? This calculator does it. Enter bore, stroke, cylinder count, and boom—you get CID and liters. The math is straightforward but inputs need to be precise.
