Engine Displacement Calculator
Calculate engine displacement from bore, stroke, and number of cylinders. Results in cc, cubic inches, and liters.
Ad Space (horizontal)
What is Engine Displacement?
Displacement is the total volume swept by all pistons in one complete engine cycle. It's the most basic measure of engine size and a primary factor in power output potential.
The Formula
Displacement = (π/4) × Bore² × Stroke × Number of Cylinders
This gives you the swept volume — the space the pistons travel through. It does not include the combustion chamber volume (that's what compression ratio accounts for).
Bore/Stroke Ratio
- Oversquare (ratio > 1.0) — bore is larger than stroke. Allows bigger valves, breathes better at high RPM. Common in performance engines.
- Undersquare (ratio < 1.0) — stroke is longer than bore. Better leverage on the crankshaft, stronger low-end torque. Common in truck and diesel engines.
- Square (ratio ≈ 1.0) — balanced design. Good all-around power band.
Common Conversions
- 1 Liter = 61.024 cubic inches
- 1 cubic inch = 16.387 cc
- Example: 350 ci = 5.735L, 5.7L ≈ 346 ci
Ad Space (rectangle)