CC Converter Online Free

An engine described as 998 cc in a European or Japanese listing is the same engine an American listing would call about 61 cubic inches, and the same engine its own manufacturer probably badges as a 1.0-litre. Three different numbers, one engine. A cc converter translates between the three units used for engine displacement — cubic centimetres, cubic inches and litres — so a specification written in one unit can be compared honestly with a specification written in another. The converter at the top of this page takes a value in any of the three units and returns all three, with the multiplication and division steps shown. Enter 998 as cc, for example, and it returns 998 cc = 60.90 cubic inches = 0.998 litres, worked as 998 divided by 16.387064 for the cubic inches and 998 divided by 1000 for the litres.

The reason three units survive is history, not science. Metric markets settled on cubic centimetres for small engines and litres for car engines. American manufacturers measured in cubic inches for most of the twentieth century, and the famous names of that era — the 350, the 427, the 454 — are cubic-inch numbers that still appear in classic-car listings today. When a 350 cubic inch V8 is listed beside a modern 5.7-litre engine, they are close to the same size, and this converter proves it exactly: 350 cubic inches is 5735.47 cc, which is 5.7355 litres. Converting properly matters whenever engines are compared across markets, taxed by size, or entered in a racing class with a displacement limit.

What Engine Displacement Is

Displacement is the total swept volume of an engine's cylinders: the volume each piston pushes through as it travels from the bottom of its stroke to the top, added up over every cylinder. If a single cylinder has a cross-section area of A and the piston travels a stroke length of L, that cylinder displaces A times L, and a four-cylinder engine displaces four times that. Displacement is therefore a volume, measured in volume units — nothing more mysterious than how much mixture the engine breathes in one full cycle of all its pistons.

The three units are all volumes, defined exactly. A cubic centimetre, written cc, is the volume of a cube one centimetre on each side; it is identical to a millilitre. A litre is defined as exactly 1000 cubic centimetres, so moving between cc and litres is a pure decimal shift: divide by 1000, or multiply by 1000. A cubic inch is the volume of a one-inch cube, and because the inch is defined as exactly 2.54 centimetres, one cubic inch is exactly 2.54 cubed, which is 16.387064 cubic centimetres. That single exact factor is the whole mathematics of this converter. Cubic inches come out by dividing the cc figure by 16.387064, and cc comes out of cubic inches by multiplying by 16.387064. There is no approximation in either factor; the only rounding is in how many decimal places the answer is displayed to, and this tool shows cubic inches to two decimal places.

One honest clarification belongs here. Displacement is not power. Two engines of identical cc can produce very different power because power also depends on how fast the engine turns, how much air and fuel it can be made to swallow per cycle, turbocharging, and tuning. Displacement tells you size, which is why tax bands, licence categories and racing classes are written in it — size is easy to measure and hard to argue about.

Displacement can also be built up from measurements rather than quoted. If a cylinder's bore (its diameter) is b and the stroke is s, one cylinder sweeps the area of its circular bore, pi times (b/2) squared, multiplied by s; multiply by the number of cylinders for the engine total. That is why workshop manuals quote bore and stroke in millimetres: a four-cylinder engine with an 86 mm bore and an 86 mm stroke sweeps about 1998 cc, and the "square" layout of equal bore and stroke is a classic design point. This converter deliberately starts after that arithmetic, from a finished displacement figure, because in listings, logbooks and class rules the finished figure is what is written down. But knowing where the figure comes from explains its nature: it is a volume of air, computed from geometry, and converting it is unit bookkeeping on that volume, never a new measurement.

How to Use the Converter

Using the tool takes a few seconds. Follow these steps:

1. Enter the engine size as a plain number in the first box. The live test uses 998.
2. Choose the unit that number is in: cubic centimetres (cc), cubic inches, or litres. The live test chooses cc.
3. Press "Convert Engine Size".
4. Read the headline line giving all three units at once, then the conversion steps underneath, which show the exact division or multiplication used for each figure.

If your number is in litres, choose litres and the tool first multiplies by 1000 to get cc, then divides by 16.387064 for cubic inches. If your number is in cubic inches, it multiplies by 16.387064 first. Every input route passes through cc, so all three outputs are always consistent with each other to the last displayed digit.

Worked Examples

Example 1: A modern hatchback engine, the live test

Enter 998 with the unit set to cc. The tool returns "998 cc = 60.90 cubic inches = 0.998 litres." The steps show why: cubic inches are 998 divided by 16.387064, which is 60.90 to two decimal places, and litres are 998 divided by 1000, which is 0.998 exactly. This is the engine sold almost everywhere as a "1.0-litre" or "1000 cc" unit. The badge rounds the true figure; the converter shows the true figure, and the difference — 2 cc and two-hundredths of a cubic inch — is exactly the kind of small gap that matters when a class limit or a tax band sits at 1000 cc.

Example 2: The classic 350 cubic inch V8

Enter 350 with the unit set to cubic inches. The tool returns 5735.47 cc = 350.00 cubic inches = 5.7355 litres, worked as 350 times 16.387064 for the cc. This is the engine generations of American buyers knew simply as "the 350", and it is the same size class as the modern 5.7-litre V8s that replaced it. Notice the lesson in the figures: the marketing number 5.7 litres suggests 5700 cc, but the true displacement of the 350 is 5735.47 cc. Rounded badges in any unit are approximations; the conversion factors are not.

Example 3: Starting from litres

Enter 2 with the unit set to litres. The tool returns 2000 cc = 122.05 cubic inches = 2 litres, worked as 2 times 1000 for the cc, then 2000 divided by 16.387064 for the cubic inches. A 2.0-litre engine is the standard family-car size in metric markets, and 122.05 cubic inches is what the same engine would have been called in a 1960s American brochure. The same route in miniature: a 1.34-litre result appears when you enter 1340 cc, which is 81.77 cubic inches — the size class of a typical modern small turbo engine.

Example 4: A learner motorbike

Enter 250 with the unit set to cc. The tool returns 250 cc = 15.26 cubic inches = 0.25 litres. Quarter-litre bikes sit in licence and insurance classes in many countries precisely because 250 cc is a clean legal boundary, and in cubic inches the same boundary is 15.26. A larger middleweight example: 650 cc converts to 39.67 cubic inches and 0.65 litres. Motorbike engines are quoted in cc almost everywhere, so the conversion usually runs the other way for bikes — an American review quoting cubic inches for a cruiser engine is the case where you multiply back into cc to compare it with the Japanese and European figures you already know.

Where Displacement Conversions Are Used

The everyday use is comparison shopping across markets. The same car model is reviewed in litres in Europe, in cc in much of Asia, and occasionally in cubic inches in American enthusiast media; a converter turns three reviews into one comparable set of numbers. Classic-car buying is the second big use: engines named by cubic inches need translating before they can be compared with the metric sizes a buyer under forty grew up with, and a mismatch between a seller's claimed figure and the conversion is a useful early warning.

The official uses matter more. Many countries tax vehicles, set insurance groups, or restrict learner licences by displacement bands measured in cc, so an imported vehicle documented in litres or cubic inches must be converted before its band is known — 0.998 litres is under a 1000 cc boundary, while the rounded "1.0-litre" badge looks, wrongly, like it sits exactly on it. Racing classes are also written as displacement limits, sometimes in cc and sometimes in cubic inches, and eligibility is judged on the true figure, not the badge. Finally, manufacturers' own naming is a conversion puzzle: model badges routinely round 998 cc to "1000", 5735 cc to "5.7", and 1340 cc to "1.4"-adjacent marketing figures, and the converter recovers the real numbers behind the badges.

How to Read the Output

The headline line always gives the three units in the same order — cc, cubic inches, litres — regardless of which unit you entered, so results from different conversions line up on the page. The steps line then shows each route separately: the unit you entered is marked "(as entered)", and the other two show the arithmetic that produced them, for example "Cubic inches: 998 / 16.387064 = 60.90 cu in". Cubic inches are shown to two decimal places, cc to two with trailing zeros trimmed, and litres to four with trailing zeros trimmed, so 0.998 litres and 2 litres are both displayed in their shortest exact form. If the steps and the headline ever disagreed, the steps are the ones to trust and re-check — they are the actual computation, printed.

Common Mistakes

The first common mistake is using 16.4 or 16 as the cubic-inch factor from memory and then treating the answer as exact. At 350 cubic inches, the rough factor 16 gives 5600 cc against the true 5735.47 cc — an error of more than 135 cc, larger than a small motorbike engine. The second mistake is reading a badge as a measurement: "5.7 litres" is a rounded label for 5735.47 cc, not a promise of 5700. The third is comparing a rounded figure against a legal limit, as in the 998 cc example — convert first, then compare. The fourth is assuming equal cc means equal performance; displacement is size only, and a turbocharged 998 cc engine can out-power a lazy 2000 cc one. The fifth is confusing fluid volume units with displacement units: a cubic inch is a cubic inch whether it measures an engine or a bottle, but an ounce of engine size in an old listing means cubic inches, never fluid ounces.

Limits: What This Tool Does and Does Not Do

This tool converts a displacement value between cc, cubic inches and litres, using the exact factors 16.387064 cc per cubic inch and 1000 cc per litre, and shows its steps. It does not calculate displacement from bore and stroke measurements — that needs the cylinder count, bore diameter and stroke length combined with the circle-area formula, a different calculation. It does not estimate horsepower, torque, fuel use or performance from size, because those cannot be derived from displacement alone. It accepts positive numbers only, since a displacement of zero or less is not an engine. And it converts the number you give it faithfully even when that number is a manufacturer's rounded badge: enter 5700 and you will get the conversion of 5700, not of the 5735.47 cc the badge stands for.

Privacy: Your Numbers Stay in Your Browser

Every number you enter into this cc converter stays in your browser. Nothing is uploaded to a server, nothing is stored, and there is no account to create. The calculation runs entirely on your own device. Closing the page removes your inputs, and no one else sees them. This browser-only design is the same principle behind the other free tools on Your Smart Kit: a simple tool that does one job well, keeps your data private, and gives an answer you can check.

Frequently Asked Questions

How many cc are in a cubic inch?

Exactly 16.387064 cc, because the inch is defined as exactly 2.54 cm and 2.54 cubed is 16.387064. Multiply cubic inches by that factor to get cc; divide cc by it to get cubic inches.

Is 998 cc the same as a 1.0-litre engine?

Nearly, but not exactly. 998 cc is 0.998 litres, and 1000 cc is exactly 1 litre. The 998 cc engine is badged 1.0 as a rounding; for tax or class boundaries written at 1000 cc, the true figure is 998.

How many cubic inches is a 2.0-litre engine?

122.05 cubic inches: 2 litres is 2000 cc, and 2000 divided by 16.387064 is 122.05. The worked example above shows the tool producing exactly this result.

What does cc stand for?

Cubic centimetres — the volume of a cube one centimetre on each side. A cc is the same volume as a millilitre, which is why medical doses are also measured in cc.

Does a bigger cc always mean a more powerful engine?

No. Displacement is size, not output. Turbocharging, engine speed, and tuning decide power; a modern turbocharged 998 cc engine can produce more power than an older naturally aspirated 2000 cc engine.

Why do American engines use cubic inches?

Habit from the imperial era of the US car industry. The famous sizes — 305, 350, 427, 454 — are cubic inches, and the classic-car market still trades in them, which is why converting them to cc and litres stays useful.

Related Tools on Your Smart Kit

If you found the cc converter useful, you may also like the other free converters on Your Smart Kit, including the unit converter for length, volume, temperature and more, the mass converter for converting between any two mass units, and the electrical unit converter for watts, volts and amps. Each runs in your browser, free, with no sign-up, and each is built on the same principle: a simple tool that does one job well, keeps your data private, and gives an answer you can check. Try the cc converter at the top of this page with the engine size from any listing, in whichever unit it is quoted, and read it back in the units you think in.