How to Convert US fluid ounces to Cubic centimetres (fl oz to cm³)
Volume conversions help with baking from American recipes, comparing petrol prices quoted per gallon abroad with pump prices per litre here, and reading PUB water bills in cubic metres. This guide shows how to convert us fluid ounces into cubic centimetres by hand, with examples and a quick-reference table.
The conversion
To convert us fluid ounces to cubic centimetres, multiply the value by 29.5735. To go the other way, divide by the same number (or multiply by 0.0338140565). For a quick estimate, multiply by about 30.
Cubic centimetres = us fluid ounces × 29.5735
Worked examples
- 3 fl oz = 88.7205 cm³
- 12.5 fl oz = 369.6687 cm³
- 75 fl oz = 2,218.01 cm³
US fluid ounces to Cubic centimetres table
| US fluid ounces | Cubic centimetres |
|---|---|
| 1 fl oz | 29.5735 cm³ |
| 2 fl oz | 59.147 cm³ |
| 5 fl oz | 147.8675 cm³ |
| 10 fl oz | 295.735 cm³ |
| 20 fl oz | 591.47 cm³ |
| 25 fl oz | 739.3375 cm³ |
| 50 fl oz | 1,478.67 cm³ |
| 100 fl oz | 2,957.35 cm³ |
| 250 fl oz | 7,393.38 cm³ |
| 500 fl oz | 14,786.75 cm³ |
| 1,000 fl oz | 29,573.5 cm³ |
Common questions
Is fl oz to cm³ exact?
The factors used here are the internationally defined values where they exist; results are rounded for display only.
How do I convert back?
Use the Cubic centimetres to US fluid ounces converter.
Mistakes to avoid
Mixing similar-sounding units
US and imperial gallons, pints and tons are different sizes, and decimal kilobytes differ from binary kibibytes.
Dropping the units
A bare number without a unit is easy to misread later. Always write the unit with the result.
Forgetting squared and cubed units
Area and volume factors are the length factor squared or cubed, so 1 m² is about 10.76 sq ft, not 3.28.
Background
For everyday use, three or four significant figures are usually enough. Engineering, science and trade documents may need more, and rounding should happen only at the end of a calculation.
Writing the units next to every number while you work is the simplest way to avoid mistakes. If the units do not cancel to leave the one you want, the calculation is set up wrongly.
Unit conversion is simply multiplication by a fixed ratio. The ratio between two units of the same quantity never changes, so once you know it you can convert any value in either direction.
For any value, use the US fluid ounces to Cubic centimetres Converter or browse all volume converters.
Run your own numbers: US fluid ounces to Cubic centimetres Converter