A US fluid ounce is 1/128 of a US gallon.
Fluid ounces to Cubic Centimeters Converter — fl oz to cm3
Convert Fluid ounce (fl oz) to Cubic Centimeter (cm3) using the exact conversion factor (1 fluid ounce = 29.57352956 cubic centimeter). See the formula, worked examples, conversion table, history, and common uses.
Fluid ounces to Cubic Centimeters converter
Converter
Volume Converter
Convert metric, US customary, imperial, cooking, dry, and industrial volume units.
Context values
Some unit families need one extra value for a physically accurate result.
Cubic metric volume unit.
Result = input x 2.95735296e-5 / 1e-6.
Volume uses the cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Fluid ounces to Cubic Centimeters
Fluid ounce and Cubic Centimeter appear side by side at fuel pumps and on beverage labels, since the US measures liquids in gallons while most of the world uses liters. Fluid ounce is most often used for us beverage container sizing (soda, water bottles).
Formula
cubic centimeters = fluid ounces × 29.5735295625
This factor comes from each unit's defined relationship to the category's base unit: 1 fluid ounce equals 0.0000295735295625 base units, and 1 cubic centimeter equals 0.000001 base units, so dividing one by the other gives the direct fluid ounce-to-cubic centimeter factor of 29.5735295625.
Simple example
1 fl oz × 29.57352956 = 29.57352956 cm3
1 fluid ounce = 29.57352956 cubic centimeters.
Real-world example
10 fl oz × 29.57352956 = 295.7352956 cm3
10 fluid ounces = 295.7352956 cubic centimeters.
Conversion table
| Fluid ounce (fl oz) | Cubic Centimeter (cm3) |
|---|---|
| 1 fl oz | 29.57352956 cm3 |
| 5 fl oz | 147.8676478 cm3 |
| 10 fl oz | 295.7352956 cm3 |
| 25 fl oz | 739.3382391 cm3 |
| 50 fl oz | 1,478.676478 cm3 |
| 100 fl oz | 2,957.352956 cm3 |
Reverse conversion: Cubic Centimeter to Fluid ounce
29.57352956 cm3 × 0.0338140227 = 0.9999999999 fl oz
29.57352956 cubic centimeters = 0.9999999999 fluid ounces.
fluid ounces = cubic centimeters × 0.0338140227018
For a page dedicated to this direction, see Cubic Centimeter to Fluid ounce.
Understanding the Fluid ounce
Fluid ounce (fl oz) measures volume. The US fluid ounce is 1/128 of a US gallon: exactly 29.5735295625 milliliters. It is classified as a US customary unit.
Where it's used: United States (beverage, nutrition labeling)
Uses of the Fluid ounce today
- US beverage container sizing (soda, water bottles)
- US nutrition and medication dosing labels
History of the Fluid ounce
The US fluid ounce follows from the same English wine-gallon system as the rest of the US liquid volume units, defined as a consistent fraction of the gallon.
Historical origin. Fluid ounce was not the invention of a single named person; it developed through the process described above.
Understanding the Cubic Centimeter (cm3)
Cubic metric volume unit.
Fluid ounce — sources
- NIST Handbook 44, Appendix C — General tables of units including the US fluid ounce definition.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many cubic centimeters are in 1 fluid ounce?
1 fluid ounce equals 29.57352956 cubic centimeters, using the exact defined conversion factor rather than an estimate.
How do I convert fluid ounce to cubic centimeter?
Multiply the fluid ounce value by 29.57352956. The converter above does this instantly to whatever precision you set.
How do I convert cubic centimeter back to fluid ounce?
Use the reverse factor: 1 cubic centimeter equals 0.0338140227 fluid ounces. You can also use the swap control in the converter above to flip the direction instantly.
What is a fluid ounce?
Fluid ounce (fl oz) measures volume. The US fluid ounce is 1/128 of a US gallon: exactly 29.5735295625 milliliters. It is classified as a US customary unit.
What is a cubic centimeter?
Cubic Centimeter (cm3) is a unit of volume.
Is the fluid ounce to cubic centimeter conversion exact?
Yes. The US fluid ounce is 1/128 of a US gallon: exactly 29.5735295625 milliliters. That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.
Where is the fluid ounce still used today?
United States (beverage, nutrition labeling)