Engine Size Converter
Convert engine displacement between cc, liters and cubic inches (CID) instantly.
American engines are quoted in cubic inches (a 350, a 454), the rest of the world uses liters or cc, and spec sheets mix all three. This converter translates any engine size into all units at once.
Conversion Formulas
Marketing rounds aggressively: the "5.7 L" small-block is really 349.85 CID ≈ 5.74 L, and the famous "5.0" Mustang is 302 CID = 4.94 L. When precision matters (ordering pistons, registration classes), compute from actual bore and stroke with the displacement calculator.
Famous Engine Sizes Converted
| Engine | CID | cc | Liters |
|---|---|---|---|
| Ford 302 V8 | 302 | 4,949 | 4.9 ("5.0") |
| Chevy 350 small-block | 350 | 5,735 | 5.7 |
| Chevy 454 big-block | 454 | 7,440 | 7.4 |
| Chrysler 426 Hemi | 426 | 6,981 | 7.0 |
| Typical 2.0 L four | 122 | 2,000 | 2.0 |
| 600cc sport bike | 36.6 | 600 | 0.6 |
Worked Example
Full cc ↔ Liters ↔ Cubic Inches Chart
From scooter engines through to big-block V8s.
| cc | Liters | Cubic inches | Typical application |
|---|---|---|---|
| 50 | 0.05 | 3.1 | Moped, strimmer |
| 125 | 0.125 | 7.6 | Learner motorcycle |
| 250 | 0.25 | 15.3 | Small motorcycle, ATV |
| 600 | 0.6 | 36.6 | Supersport motorcycle |
| 1,000 | 1.0 | 61.0 | Liter superbike, city car |
| 1,600 | 1.6 | 97.6 | Compact car |
| 2,000 | 2.0 | 122.0 | Mainstream four-cylinder |
| 3,000 | 3.0 | 183.1 | Six-cylinder |
| 4,000 | 4.0 | 244.1 | V6 / small V8 |
| 4,949 | 4.9 | 302 | Ford 302 "5.0" |
| 5,735 | 5.7 | 350 | Chevy small-block 350 |
| 6,162 | 6.2 | 376 | Modern LS-family V8 |
| 6,981 | 7.0 | 426 | Chrysler 426 Hemi |
| 7,440 | 7.4 | 454 | Chevy big-block 454 |
| 8,194 | 8.2 | 500 | Cadillac 500 |
Why "5.0" Is Not 5.0 Liters
Badge numbers are marketing, not measurements, and the gap is often larger than you would expect:
| Badge | Actual displacement | True liters | Error |
|---|---|---|---|
| Ford "5.0" | 302 CID | 4.95 L | +1.0% |
| Chevy "5.7" | 350 CID | 5.74 L | −0.6% |
| "6.2" LS | 376 CID | 6.16 L | +0.6% |
| "1.8" four | 1,796 cc | 1.80 L | ≈0% |
Manufacturers round to the nearest tenth, and occasionally round up for marketing reasons. Where it matters — ordering pistons, entering a class-limited race series, or a displacement-based tax bracket — calculate from actual bore and stroke with the engine displacement calculator rather than trusting the badge.
Where the Exact Number Matters
- Displacement-based taxation. Many countries band vehicle tax, insurance or import duty by engine size, and the thresholds sit at round numbers — 1,000 cc, 1,600 cc, 2,000 cc. An engine at 1,998 cc and one at 2,003 cc can fall either side of a bracket.
- Racing class limits. Series rules are written in cc or CID with no tolerance. A 383 stroker at 6,276 cc does not fit a 6,200 cc class.
- Motorcycle license categories. The EU A1 category caps engines at 125 cm³, so a 124 cc machine qualifies and a 126 cc one does not — see motorcycle power-to-weight for the full A1/A2 limits.
- Parts ordering. Piston, ring and gasket sets are specified by actual bore, not badge liters.
CID, CC, Liters and the Words Around Them
| Term | Means | Note |
|---|---|---|
| cc / cm³ | Cubic centimeters | Identical units. Standard for motorcycles and most world markets. |
| CID / ci / cu in | Cubic inch displacement | US convention. 1 CID = 16.387064 cc exactly. |
| Liter (L) | 1,000 cc | Usually rounded to one decimal on a badge. |
| Swept volume | Displacement of all cylinders | Bore area × stroke × number of cylinders. |
| Total volume | Swept + combustion chamber | Used for compression ratio, not for engine size. |
The last two rows matter for engine builders: "displacement" always means swept volume. Combustion chamber volume enters the compression ratio calculation, never the displacement figure.
To estimate what displacement a given power target implies, see the HP to CC calculator, or work the other way with CC to HP.
Frequently Asked Questions
350 cubic inches = 5,735 cc = 5.7 liters.
2.0 L = 2,000 cc = 122 cubic inches.
Marketing rounds to friendly numbers — the "5.0" Ford is 4.94 L, and many "2.0 L" engines are 1,984–1,999 cc. Exact displacement comes from bore × stroke × cylinders.
Exactly 1.0 liter, or 61 cubic inches. A liter is 1,000 cc by definition, so the conversion is just moving the decimal point three places.
376 cubic inches — 6,162 cc. The modern LS-family 6.2 is the direct descendant of the 350 small-block at 5,735 cc.
Because thresholds sit at round numbers. Displacement-based tax bands, racing class limits and the EU A1 motorcycle cap of 125 cm³ all have zero tolerance — 1,998 cc and 2,003 cc can fall either side of a bracket.
Yes — identical units, just different notation. Motorcycle regulations tend to write cm³ while spec sheets write cc.
No. Displacement is swept volume only — bore area × stroke × cylinders. Combustion chamber volume belongs in the compression ratio calculation, never in engine size.