Engine Displacement Calculator
A free, browser-based calculator. Runs entirely in your browser — no sign up, nothing stored.
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Enter Values
Enter your values and press Calculate to see results.
How to use this calculator
- Enter bore and stroke (mm) and the number of cylinders.
- Read the displacement.
How it works
Each cylinder's swept volume = π/4 × bore² × stroke; multiply by the number of cylinders.
Worked example
86 mm bore & stroke, 4 cyl. ≈ 1998 cc (2.0 L).
Common mistakes
- Entering bore/stroke in cm or inches — use millimetres.
- Confusing swept volume with total chamber volume (this is swept only).
Frequently asked questions
Why is my result like 1998 cc not 2000?
Displacement rarely lands on a round number; makers round to the nearest 'badge' size like 2.0 L.
Related tools
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.