Convert US fluid ounces to Cubic millimetres
1 US fluid ounce is 29,573.53 mm³. One US fluid ounce is exactly 29573.5295625 cubic millimetres.
One US fluid ounce is 29573.53 cubic millimetres. To convert US fluid ounces to cubic millimetres, multiply by 29573.53; to go the other way, divide by 29573.53 or multiply by 3.3814 × 10^-5. The relation is exact but the figure is not: it is a rounding of a number that does not terminate, and it follows from NIST Handbook 130. Exactly one 128th of a US gallon, which makes it 29.5735295625 ml exactly.
Factor checked against the defining standard · How we check
- US fluid ounces × 29573.53
1 * 29573.5329,573.53 mm³
1 US fluid ounce in every volume unit
| Unit | Value | Exact factor |
|---|---|---|
| US teaspoons | 6 tsp | × 6 |
| US tablespoons | 2 tbsp | × 2 |
| US fluid ounces (as entered) | 1 fl oz | — |
| US cups | 0.125 cup | × 0.125 |
| US pints | 0.0625 pt | × 0.0625 |
| US quarts | 0.03125 qt | × 0.03125 |
| US gallons | 0.0078125 gal | × 0.0078125 |
| milliliters | 29.57352956 ml | × 29.5735295625 |
| liters | 0.02957352956 L | × 0.0295735295625 |
| imperial gallons | 0.006505267067 gal (UK) | × 0.00650526706741 |
| imperial quarts | 0.02602106827 qt (UK) | × 0.0260210682697 |
| imperial pints | 0.05204213654 pt (UK) | × 0.0520421365393 |
| imperial fluid ounces | 1.040842731 fl oz (UK) | × 1.04084273079 |
| imperial gills | 0.2081685462 gi (UK) | × 0.208168546157 |
| cubic millimetres | 29,573.52956 mm³ | × 29,573.5295625 |
| cubic centimetres | 29.57352956 cm³ | × 29.5735295625 |
| cubic inches | 1.8046875 in³ | × 1.8046875 |
| cubic feet | 0.00104437934 ft³ | × 0.00104437934028 |
| cubic yards | 0.00003868071631 yd³ | × 0.0000386807163066 |
| cubic metres | 0.00002957352956 m³ | × 0.0000295735295625 |
Factors are entered by hand from NIST Handbook 130 rather than derived from a units library, so the ones that terminate are exact rather than rounded.
How do you convert US fluid ounces to cubic millimetres? The converter and the working
- 1.Take the measurement in US fluid ounces.
- 2.Multiply by 29573.53 — that is how many cubic millimetres fit in one US fluid ounce.
- 3.To go back the other way, divide by 29573.53, or multiply by 3.3814 × 10^-5.
Worked example: 25 US fluid ounces to cubic millimetres
- Formula
- fl oz × 29573.53 = mm³
- Arithmetic
- 25 × 29573.53 = 739,338.24 mm³
- Answer
- 25 fl oz = 739,338.24 mm³
The factor is rounded for display; the figure above is computed from the full value.
US fluid ounces to cubic millimetres conversion table
| US fluid ounces | Cubic millimetres |
|---|---|
| 1 fl oz | 29,573.53 mm³ |
| 2 fl oz | 59,147.06 mm³ |
| 3 fl oz | 88,720.59 mm³ |
| 4 fl oz | 118,294.12 mm³ |
| 5 fl oz | 147,867.65 mm³ |
| 6 fl oz | 177,441.18 mm³ |
| 7 fl oz | 207,014.71 mm³ |
| 8 fl oz | 236,588.24 mm³ |
| 9 fl oz | 266,161.77 mm³ |
| 10 fl oz | 295,735.3 mm³ |
| 12 fl oz | 354,882.35 mm³ |
| 15 fl oz | 443,602.94 mm³ |
| 20 fl oz | 591,470.59 mm³ |
| 25 fl oz | 739,338.24 mm³ |
| 50 fl oz | 1,478,676.48 mm³ |
| 100 fl oz | 2,957,352.96 mm³ |
| 200 fl oz | 5,914,705.91 mm³ |
| 300 fl oz | 8,872,058.87 mm³ |
| 500 fl oz | 14,786,764.78 mm³ |
| 1000 fl oz | 29,573,529.56 mm³ |
| 2000 fl oz | 59,147,059.13 mm³ |
| 5000 fl oz | 147,867,647.81 mm³ |
| 10000 fl oz | 295,735,295.63 mm³ |
What is a US fluid ounce?
Exactly one 128th of a US gallon, which makes it 29.5735295625 ml exactly. The imperial fluid ounce is a different unit at exactly 28.4130625 ml, so a UK recipe calling for 10 fl oz means 284 ml and a US one means 296 ml. It is also a volume, not a weight: an ounce of flour is not a fluid ounce of flour.
What is a cubic millimetre?
A millionth of a litre, because the millimetre is a thousandth of a metre and volume cubes the factor. A microlitre by another name, and the unit injection-moulding shot sizes are quoted in.
How many cubic millimetres are in a US fluid ounce?
One US fluid ounce is 29573.53 cubic millimetres. Going the other way, one cubic millimetre is 3.3814 × 10^-5 US fluid ounces. Both figures come from the same defined relation rather than from a measurement, which is why they are the same today as they were in 1959.
Every volume unit here
The whole group — 20 units with their symbols and the size of each one in liters — is on the conversion index, along with every pair it makes. The table above already gives each of them relative to a US fluid ounce.
Cite this page
- APA
- Rule Calculator. (2026). Convert US fluid ounces to cubic millimetres. Rule Calculator. https://rulecalculators.com/convert/fluid-ounce-to-cubic-millimeter
- MLA
- "Convert US fluid ounces to cubic millimetres." Rule Calculator, August 16, 2026, https://rulecalculators.com/convert/fluid-ounce-to-cubic-millimeter.
- Chicago
- Rule Calculator. "Convert US fluid ounces to cubic millimetres." Rule Calculator. Last reviewed August 16, 2026. https://rulecalculators.com/convert/fluid-ounce-to-cubic-millimeter.
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Questions people actually ask
- How many cubic millimetres are in a US fluid ounce?
- 29573.53. A millionth of a litre, because the millimetre is a thousandth of a metre and volume cubes the factor. A microlitre by another name, and the unit injection-moulding shot sizes are quoted in.
- How do I convert cubic millimetres back to US fluid ounces?
- Divide by 29573.53, or multiply by 3.3814 × 10^-5 — they are the same operation.
Other volume conversions
Cubic millimetres to US fluid ounces — the same conversion the other way.