Engine Displacement Calculator
Calculate swept engine volume from bore, stroke and cylinder count.
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What this tool does
Calculate swept engine volume from bore, stroke and cylinder count. Swept volume excludes combustion chamber clearance volume.
How to use the Engine Displacement Calculator
- Enter or select cylinder bore in in.
- Enter or select piston stroke in in.
- Enter or select cylinder count.
- Read the calculated result; change any measurement to compare alternatives.
Formula
displacement=π/4×bore²×stroke×cylinders; liters=cubic inches×0.016387064
- bore
- Cylinder bore (in, before metric conversion)
- stroke
- Piston stroke (in, before metric conversion)
- cylinders
- Cylinder count
Swept volume excludes combustion chamber clearance volume.
Worked example
For engine displacement calculator, the following measurements illustrate the exact method: Cylinder bore: 3.5; Piston stroke: 3.5; Cylinder count: 8.
Inputs
- Cylinder bore3.5 in
- Piston stroke3.5 in
- Cylinder count8
Result
- Displacement (liters)4.41
- Displacement (cubic inches)269.39
Results explained
- Displacement (liters)
- Displacement (liters) from the formula above. Swept volume excludes combustion chamber clearance volume.
- Displacement (cubic inches)
- Displacement (cubic inches) from the formula above. Swept volume excludes combustion chamber clearance volume.
Frequently asked questions
displacement=π/4×bore²×stroke×cylinders; liters=cubic inches×0.016387064
Use the tire sidewall markings, actual vehicle specifications or recorded fuel/price values required by the inputs. Do not mix US gallons and imperial gallons.
Swept volume excludes combustion chamber clearance volume.
Yes. Change the relevant size, price or efficiency while keeping the other inputs constant. Results update immediately.
No. Check manufacturer fitment, load and speed ratings, clearance and local requirements with a qualified technician.