Cubic Inches to Liters (in³ to L)
An inch is exactly 2.54 centimeters, so a cubic inch is exactly 16.387064 cubic centimeters and this conversion is one multiplication: liters = cubic inches × 0.016387064. Nothing in that factor is measured, so it is the same number in the United States, the United Kingdom and everywhere else, and the only rounding is in the decimal you read. That puts 1 in³ at 0.016387064 L, 100 in³ at 1.6387064 L and 350 in³, the engine size behind much of this search, at 5.7354724 L. This page opens the converter on the Volume category with the cubic inch in the From box and the liter in the To box, whatever pair you converted last, answers as you type to twelve significant digits with no button to press, and lists the same volume underneath in milliliters, liters, cubic meters, teaspoons, tablespoons, US fluid ounces, cups, pints, quarts and US gallons. The cubic inch is one of the five volume units this converter treats as uncommon, so it sits in both unit menus at all times, and ticking the switch marked Show 5 more adds the imperial fluid ounce, imperial pint, imperial gallon and cubic foot to the list under the answer. The menu labels are Liter (L), Milliliter (mL), Cubic meter (m³) and Cubic inch (in³).
- Category
- Volume
- Base unit
- liter
- Uncommon units
Spoons and cups are US customary measures. Imperial fluid ounces, pints and gallons have separate labeled entries; metric and Australian spoons are not separate units.
Results round to 12 significant digits using the listed unit definitions. Input must have a finite numeric magnitude and at most 512 significant digits. Type a single decimal or scientific number; a matching From unit suffix is accepted. Commas and grouped spaces separate thousands; decimal commas, fractions and compound measurements are refused.
1 in³ in every volume unit
Selectable complete conversion
Common questions
- How many liters is 1 cubic inch?
- 0.016387064 liters, exactly, because an inch is exactly 2.54 centimeters and 2.54 × 2.54 × 2.54 is 16.387064 cubic centimeters. Everything scales straight through, so 10 in³ is 0.16387064 L, 100 in³ is 1.6387064 L and 1,000 in³ is 16.387064 L: the same digits with the point moved, because the whole conversion is a single multiplication. The sizes asked about most often: 200 in³ is 3.2774128 L, 302 in³ is 4.948893328 L, 350 in³ is 5.7354724 L, 400 in³ is 6.5548256 L and 454 in³ is 7.439727056 L. Type the cubic inches into the From box and the answer appears without pressing anything, and Copy result copies the figure without the thousands separators so it pastes straight into a spreadsheet.
- What is the formula for cubic inches to liters?
- Liters = cubic inches × 0.016387064, using the exact factor. The exact reverse factor is 125000000/2048383 cubic inches per liter; its displayed 61.0237440947 is rounded, so dividing by that decimal is only an approximation. Here 1,728 in³ is exactly 28.316846592 L and 231 in³ exactly 3.785411784 L. Using a shortened 0.0164 L per in³ would give 5.74 L for 350 in³ instead of 5.7354724 L, an overestimate of about 0.079%.
- Why is the same engine quoted as 350 cubic inches and 5.7 liters?
- A stated displacement of exactly 350 in³ converts to 5.7354724 L, which rounds to 5.7 L at one decimal place. Similarly 454 in³ is 7.439727056 L (7.4 L to one decimal), 427 in³ is 6.997276328 L (7.0 L), and 302 in³ is 4.948893328 L (4.9 L). A manufacturer’s badge can follow another convention and does not prove exact displacement. Converting an exact stated 5.0 L gives 305.118720474 in³ and 2.0 L gives 122.047488189 in³; converting a rounded badge cannot recover unprovided dimensions.
- Is 0.016387064 exact, or is it rounded?
- The factor is exact under the international inch of 2.54 cm and the liter of one cubic decimeter. A cubic inch is exactly 2048383/125000000 L = 0.016387064 L. Reversing the fraction gives 125000000/2048383 in³ per liter, whose denominator is 127³, so its decimal does not terminate. The display rounds to twelve significant digits: 61.0237440947 in³ converts to 0.999999999999 L because the input is a shortened inverse factor. The converter calculates from the written decimal using rational arithmetic; output and copied numbers still round.
- Do US and imperial cubic inches or liters differ?
- This converter uses the international inch of exactly 2.54 cm and the liter of exactly one cubic decimeter, so a cubic inch is exactly 0.016387064 L under those definitions. US liquid and imperial gallons differ: 3.785411784 L and 4.54609 L respectively. One in³ displays as 0.004329004329 US liquid gallons or 0.00360465014991 imperial gallons. Both are in the menus; Show 5 more adds the uncommon imperial and cubic rows to the readout. Historical survey-length definitions are separate and are not used here.
- How do I convert liters back to cubic inches?
- Multiply by the exact ratio 125000000/2048383; 61.0237440947 is its twelve-significant-digit rounded display. The converter displays 1.6 L as 97.6379905516 in³, 2 L as 122.047488189 in³, 4.6 L as 280.709222836 in³, 5.7 L as 347.83534134 in³ and 6.2 L as 378.347213387 in³. Swap units reverses the pair and reinterprets the unchanged scalar number in the new From unit. Copy result copies the rounded display without grouping commas.
- Are cubic inches and cc the same thing?
- They are the same kind of measurement in different units, and a cubic centimeter is exactly a milliliter, so an engine quoted in cc is already quoted in milliliters. One cubic inch is exactly 16.387064 cc, which makes 88 in³ 1,442.061632 cc and 1,200 cc 73.2284929137 in³. You do not have to change anything to see it: the milliliter row in the list under the answer is the cc figure for whatever cubic inches you typed, next to the liter figure in the headline.
- How do I work out the cubic inches in the first place?
- Multiply length by width by height with every measurement in inches: a box 12 by 6 by 4 inches is 288 in³, which this page converts to 4.719474432 L. For a cylinder, a cone, a tank filled part way or a pool, the volume calculator linked below takes the dimensions instead, and when you measure in inches it prints the cubic inches with liters beside them. Lumber is the other place this unit hides, since a board foot is 144 cubic inches, which is 2.359737216 L.
- Why does the page open on cubic inches and liters, and does it change my saved units?
- This focused page opens on Cubic inch and Liter, while preserving the main converter’s saved unit pair. When storage is usable, a saved value and uncommon-unit preference can travel between pages. Its suffix must still match the current From unit. Valid deliberate scalar edits can save those fields after a short delay; invalid or incomplete drafts do not overwrite the saved record. Unusable or conflicting records are kept with an explanation until you use Forget saved settings, which keeps the current conversion on screen.
- Does anything I type here leave my browser?
- Your input and converted values are calculated in the browser and are not uploaded by the converter. The definitions arrive with the page, so conversion needs no external data lookup and keeps working offline after the page has loaded. The core conversion needs no account. When storage is usable, only valid deliberate changes can save supported scalar fields; invalid drafts keep the previous record. Forget saved settings removes that record while keeping the current conversion on screen.
Results round to 12 significant digits using the listed unit conventions. Many factors are exact definitions; psi and parsec use rounded coefficients. Temperature includes scale offsets. Days and weeks are fixed-duration units, and unit conversion does not determine calendar dates, ambient pressure or a software label’s convention.