Milliliters to Fluid Ounces Converter (mL to fl oz)
1 US fl oz = 29.5735295625 mL exactly. Convert milliliters to US fluid ounces or back, with UK fluid ounces shown for bottles, cans and recipes.
US Fluid Ounce (fl oz) = Milliliter (mL) × 0.0338140227018
Milliliter (mL): A milliliter is one thousandth of a liter and exactly the same volume as one cubic centimeter. There are 1,000 microliters in a milliliter and 1,000 milliliters in a liter.
US Fluid Ounce (fl oz): The US fluid ounce is 1/128 of a US gallon, exactly 29.5735295625 mL. It measures liquid volume on US drink and medicine labels and is not the same as the ounce of weight.
| Milliliter (mL) | US Fluid Ounce (fl oz) |
|---|---|
| 1 | 0.0338140227018 |
| 5 | 0.169070113509 |
| 10 | 0.338140227018 |
| 25 | 0.845350567546 |
| 50 | 1.69070113509 |
| 100 | 3.38140227018 |
A US fluid ounce is 1/128 of a US gallon, exactly 29.5735295625 mL. The UK fluid ounce is slightly smaller at exactly 28.4130625 mL, and the chart shows both for each milliliter value.
US nutrition labels use a rounded 30 mL per fluid ounce, so a label and an exact conversion can differ slightly. Drink cans, travel-size bottles and measuring cups are the usual reasons to convert.
How to use this tool
- Type a value in the Milliliter box to see it in US fluid ounces, or type in the US Fluid Ounce box to convert the other way.
- Press ⇄ to swap the two units, or Load example for a typical value.
- Check the charts below for common values; for other units, open the Volume converter.
Formula
US Fluid Ounce (fl oz) = Milliliter (mL) × 0.0338140227018
Milliliter (mL) = US Fluid Ounce (fl oz) × 29.5735295625
Both factors come from exact definitions: 1 us fluid ounce = 29.5735295625 milliliters and 1 milliliter = 0.0338140227018 US fluid ounces (shown to 12 significant digits).
Example
Two conversions worked with the same factors the converter uses:
355 mL × 0.0338140227018 ≈ 12.004 fl oz
8 fl oz × 29.5735295625 ≈ 236.588 mL
Milliliter to US Fluid Ounce chart
Common values from milliliters to US fluid ounces, rounded to four decimal places.
| Milliliter (mL) | US Fluid Ounce (fl oz) | UK fluid ounces |
|---|---|---|
| 5 | 0.1691 | 0.176 |
| 10 | 0.3381 | 0.352 |
| 15 | 0.5072 | 0.5279 |
| 30 | 1.0144 | 1.0559 |
| 50 | 1.6907 | 1.7598 |
| 60 | 2.0288 | 2.1117 |
| 100 | 3.3814 | 3.5195 |
| 118 | 3.9901 | 4.153 |
| 120 | 4.0577 | 4.2234 |
| 150 | 5.0721 | 5.2793 |
| 200 | 6.7628 | 7.039 |
| 237 | 8.0139 | 8.3412 |
| 250 | 8.4535 | 8.7988 |
| 300 | 10.1442 | 10.5585 |
| 330 | 11.1586 | 11.6144 |
| 350 | 11.8349 | 12.3183 |
| 355 | 12.004 | 12.4943 |
| 400 | 13.5256 | 14.078 |
| 473 | 15.994 | 16.6473 |
| 500 | 16.907 | 17.5975 |
| 591 | 19.9841 | 20.8003 |
| 750 | 25.3605 | 26.3963 |
| 1,000 | 33.814 | 35.1951 |
US Fluid Ounce to Milliliter chart
The reverse direction for values people often look up.
| US Fluid Ounce (fl oz) | Milliliter (mL) |
|---|---|
| 0.5 | 14.7868 |
| 1 | 29.5735 |
| 2 | 59.1471 |
| 3 | 88.7206 |
| 4 | 118.2941 |
| 5 | 147.8676 |
| 6 | 177.4412 |
| 8 | 236.5882 |
| 10 | 295.7353 |
| 12 | 354.8824 |
| 16 | 473.1765 |
| 20 | 591.4706 |
| 24 | 709.7647 |
| 32 | 946.3529 |
| 33.8 | 999.5853 |
| 64 | 1,892.71 |
| 128 | 3,785.41 |
Quick mental estimate
Divide milliliters by 30: 500 mL → about 16.7 fl oz. Because a fluid ounce is a little less than 30 mL, the shortcut comes out about 1.4% low.
Use the converter or the charts when the exact figure matters.
The two units
Milliliter (mL): A milliliter is one thousandth of a liter and exactly the same volume as one cubic centimeter. There are 1,000 microliters in a milliliter and 1,000 milliliters in a liter.
US Fluid Ounce (fl oz): The US fluid ounce is 1/128 of a US gallon, exactly 29.5735295625 mL. It measures liquid volume on US drink and medicine labels and is not the same as the ounce of weight.
Frequently asked questions
How many mL are in a US fluid ounce?
Exactly 29.5735295625 mL, usually rounded to 29.57 mL. A US cup of 8 fl oz is about 236.6 mL.
Is a UK fluid ounce the same?
No. A UK fluid ounce is 28.4130625 mL, about 4% smaller. A UK pint also holds 20 UK fluid ounces, while a US pint holds 16 US fluid ounces.
Why does a nutrition label say 30 mL per ounce?
US food-labeling rules (21 CFR 101.9) let labels use 30 mL for 1 fluid ounce when stating serving sizes. The exact conversion factor is 29.5735295625 mL.
How precise is the result?
The converter uses the exact definitions above with browser floating-point arithmetic and shows up to 12 significant digits. The charts round to four decimal places for reading.
Sources
Last updated:
Page address with these inputs: https://kakao.mobile/tools/milliliter-to-us-fluid-ounce-converter/
Cite or embed this tool
kakaoCalc. (2026, November 2). Milliliters to Fluid Ounces Converter (mL to fl oz). https://kakao.mobile/tools/milliliter-to-us-fluid-ounce-converter/
“Milliliters to Fluid Ounces Converter (mL to fl oz).” kakaoCalc, 2 Nov. 2026, kakao.mobile/tools/milliliter-to-us-fluid-ounce-converter/.
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