Total displacement in CI and liters from bore, stroke and cylinders. This calculator determines total engine displacement in cubic inches and liters from bore diameter, stroke length, and cylinder count. Mustang builders use it when planning stroker kits for 302 and 351 Windsor blocks, verifying Coyote bore and stroke specs, sizing turbos on sleeved modular motors, or confirming displacement for classing and insurance on a restomod. Enter dimensions in inches and cylinder count to get CI and metric displacement instantly. It is the first number you need before running compression ratio, volumetric efficiency, or injector sizing tools on any custom short block.
Total displacement in CI and liters from bore, stroke and cylinders.
- ESTIMATES ONLY. VERIFY CRITICAL BUILD, TUNING, SAFETY, AND LEGAL DECISIONS WITH A QUALIFIED PROFESSIONAL.
This calculator determines total engine displacement in cubic inches and liters from bore diameter, stroke length, and cylinder count. Mustang builders use it when planning stroker kits for 302 and 351 Windsor blocks, verifying Coyote bore and stroke specs, sizing turbos on sleeved modular motors, or confirming displacement for classing and insurance on a restomod. Enter dimensions in inches and cylinder count to get CI and metric displacement instantly. It is the first number you need before running compression ratio, volumetric efficiency, or injector sizing tools on any custom short block.
Displacement drives everything from cam selection and injector sizing to compression ratio math and advertised horsepower class. A 302 stroker punched to 331 CI behaves differently than a stock 4.6 modular even when peak HP looks similar on paper. Mustang swap culture runs on knowing exact bore and stroke — whether you are building a 347 Windsor for a Fox or comparing a 5.2L Voodoo to a 5.0 Coyote — and guessing wrong cascades into bad fuel, tuning, and compression decisions. Track classing, emissions paperwork, and turbo compressor maps all ask for displacement in liters or cubic inches — this tool keeps those answers consistent.
Displacement in cubic inches: CI = (π ÷ 4) × Bore² × Stroke × Cylinders. For a Coyote with 3.629-inch bore, 3.649-inch stroke, and 8 cylinders: CI = 0.7854 × 3.629² × 3.649 × 8 ≈ 302.1 cubic inches. Convert to liters by multiplying CI × 0.0163871, giving roughly 4.95 L — Ford rounds to 5.0L for marketing. Each thousandth of an inch on bore matters on a V8 because you are effectively changing eight cylinders at once. A 0.030-inch overbore on a 302 block alone adds several cubic inches before you even consider a stroker crank in that same Fox Body build.
Cylinder volume is calculated from bore area and stroke, then multiplied by cylinder count.
Confusing bore with stroke is frequent on Windsor stroker discussions — a 3.400-inch bore with a 3.400-inch stroke is a 327 CI formula input, not a 302. Another error is using overbore dimensions from a machine shop without updating stroke when only the crank changed, which misstates actual displacement after a 0.030-inch hone and a 3.400-stroke crank are combined.
The 2018+ Coyote uses approximately 3.629-inch bore and 3.649-inch stroke, yielding about 302 CI or 5.0 liters. Earlier Gen 1 and Gen 2 Coyotes share the same basic bore and stroke with evolutionary head and intake changes. Enter those values with 8 cylinders and this calculator returns the displacement Ford advertises — useful when cross-checking turbo sizing or VE calculations on a stock short block. The 5.2L Voodoo in the Boss 302 and GT350 uses a longer stroke and different bore — always look up that engine's specific dimensions rather than assuming Coyote geometry.
A typical 347 uses 4.030-inch bore (0.030 over a 302 block) and 3.400-inch stroke. Enter bore 4.030, stroke 3.400, cylinders 8 — the result is roughly 347 CI or about 5.7 L. Always confirm your actual bore after machining; a 4.040 bore with the same stroke inches up further. Displacement classing at the track often uses advertised builder specs, but your logbook should match what is physically in the block.
No — breathing, compression, cam timing, heads, and induction matter as much or more. A well-built 302 Windsor can outrun a tired 351W on the same displacement advantage. Displacement sets the theoretical airflow ceiling and helps size injectors, turbos, and NA cam profiles, but two engines with identical CI can differ by hundreds of horsepower depending on how efficiently they fill the cylinders. That is why a 331 stroker and a stock Coyote both near 302 CI on paper can be worlds apart on the dyno and at the strip.
Ford marketing rounds — the Coyote is closer to 4.95 L than exactly 5.0 L when you do the math from bore and stroke. Similarly, the 5.2L Voodoo and old 4.6 modular engines have precise CI values that do not always match brochure rounding. Use the calculated liters for scientific formulas like VE and injector math; use Ford's badge when talking trim levels and parts compatibility.