Convert volume units — liters, gallons, cups, milliliters, cubic meters, barrels and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 fl oz | 0.00180468 in³ | |
| 0.01 fl oz | 0.0180468 in³ | |
| 0.1 fl oz | 0.180468 in³ | |
| 1 fl oz | 1.80468 in³ | |
| 5 fl oz | 9.02341 in³ | |
| 10 fl oz | 18.0468 in³ | |
| 50 fl oz | 90.2341 in³ | |
| 100 fl oz | 180.468 in³ | |
| 1000 fl oz | 1804.68 in³ |
Common fluid ounce values converted to cubic inch — factor: 1 fl oz = 1.805 in³
| Fluid Ounce (fl oz) | Cubic Inch (in³) | Context |
|---|---|---|
| 0.5 fl oz | 0.9023 in³ | Half ounce |
| 1 fl oz | 1.805 in³ | Shot |
| 2 fl oz | 3.609 in³ | Double shot |
| 4 fl oz | 7.219 in³ | Half cup |
| 6 fl oz | 10.83 in³ | One cup |
| 8 fl oz | 14.44 in³ | One cup |
| 12 fl oz | 21.66 in³ | Soda can |
| 16 fl oz | 28.87 in³ | One pint |
| 20 fl oz | 36.09 in³ | Large cup |
| 32 fl oz | 57.75 in³ | One quart |
| 64 fl oz | 115.5 in³ | Half gallon |
| 128 fl oz | 231 in³ | One gallon |
| 256 fl oz | 462 in³ | 2 gallons |
| 512 fl oz | 924 in³ | 4 gallons |
| 1,024 fl oz | 1,848 in³ | 8 gallons |
Converting fluid ounce to cubic inch comes up frequently in cooking, chemistry, medicine, and engineering. A recipe written in metric units may need to be adapted for a kitchen using cubic inch, or a laboratory protocol may specify volumes in fluid ounce that need to be measured with equipment calibrated in cubic inch.
In everyday use, knowing that 5 fl oz = 9.023 in³ and 10 fl oz = 18.05 in³ covers most common situations. For bulk calculations, 100 fl oz = 180.5 in³ is a useful anchor. The reverse conversion — cubic inch back to fluid ounce — uses the factor 0.5541, so 1 in³ = 0.5541 fl oz.
All conversions use the internationally recognized factor of exactly 1 fl oz = 1.805 in³. Calculations are performed in IEEE 754 double-precision floating point, giving accuracy to at least 8 significant figures — more than sufficient for any practical application.
Formula: Cubic Inch = Fluid Ounce × 1.8046817
Multiply any fluid ounce value by 1.8046817 to get cubic inch. One fluid ounce equals 1.8046817 in³.
Reverse: Fluid Ounce = Cubic Inch × 0.55411433
1 fl oz = 1.8046817 in³. Memorize this for instant mental estimates.
Use 1.8047 as a quick mental factor. Multiply your fluid ounces value by this to estimate cubic inches.
To verify: multiply your result by 0.55411433 to recover the original fl oz value.
Labels product nutrition facts and serving sizes in fluid ounces as required by FDA.
Measures spirit pours and mixers in fl oz using jiggers for cocktail consistency.
Tracks soda fountain syrup and cup sizes (12, 16, 20, 32 fl oz) for inventory.
Designs bottle fill levels in fluid ounces for US retail compliance.
Recommends daily fluid intake for children in fluid ounces by age group.
Compares unit prices per fluid ounce on beverage labels to find the best value.
The US fluid ounce is defined as 1/128 of a US gallon, exactly 29.5735 mL. The US and UK fl oz differ: the US is 29.57 mL while the Imperial fl oz is 28.41 mL.
Fluid ounces appear on every US beverage container: a soda can is 12 fl oz, a water bottle is 16.9 fl oz, and a US shot glass is 1.5 fl oz.
Interesting fact: Despite sharing the name 'ounce', the fluid ounce measures volume, not weight. One fl oz of water weighs about 1.04 oz, but one fl oz of honey weighs about 1.5 oz.
The cubic inch is the volume of a cube with one-inch sides, equal to exactly 16.387064 mL. It belongs to US customary and British Imperial systems, in practical use since the 17th century.
Cubic inches appear most often in engine displacement for small engines and in precision machining for material volume calculations.
Interesting fact: A standard 12-fluid-ounce US soda can has a volume of about 21.7 cubic inches.