8 fl oz to mL
- US fluid ounces (fl oz)
- 8 fl oz
- Milliliters
- 236.5882365 mL
Checked against: Exact-fraction computation from the legal unit definitions
US fluid ounces to milliliters converter
Convert US fluid ounces to milliliters (oz to ml) with the exact factor, a conversion chart and worked steps.
By AdminDrafted with AI writing toolsUpdated Checked examples: 3
Milliliters
mL
Milliliters: 236.5882365 mL
- Conversion
- 8 fl oz = 236.5882365 mL
- 1 mL in US fluid ounces
- 0.0338140227fl oz
8 fl oz is about 236.5882365 mL. In the other direction, 1 mL ≈ 0.03381402 fl oz.
US fluid ounces to milliliters
Oz to ml chart
| US fluid ounces | Milliliters |
|---|---|
| 1 | 29.5735 |
| 2 | 59.1471 |
| 4 | 118.2941 |
| 6 | 177.4412 |
| 8 | 236.5882 |
| 12 | 354.8824 |
| 16 | 473.1765 |
| 20 | 591.4706 |
| 24 | 709.7647 |
| 32 | 946.3529 |
| 64 | 1,892.7059 |
How it's calculated S
Conversion factor
Exact by definition.
Multiply
About the US fluid ounces to milliliters converter
To convert US fluid ounces to milliliters, multiply by 29.5735295625; to convert back, multiply by 0.0338140227. For example, 8 fl oz is about 236.588237 mL. Displayed factors and results may be rounded.
US fluid ounces are volume measures used on beverage packaging and measuring cups. They are different from ounces of mass and from imperial fluid ounces. Use the labelled US amount as the starting value, and do not infer an ingredient's weight from volume alone.
US fluid ounce: 1 US fl oz = 1/128 US gal = 29.5735295625 mL. These values are exact.
Both units are defined exactly. Calculations use 50 significant digits and round only for display.
How to convert oz to ml
Multiply US fluid ounces by 29.5735295625, the exact number of milliliters in one US fluid ounce; 29.57 is close enough for cooking. So 8 fl oz = 236.5882365 mL, one US cup, and 12 fl oz = 354.88 mL. Use it for American recipes, drink sizes and measuring-cup marks.
Where 29.5735295625 comes from
A US fluid ounce is 1/128 of a US liquid gallon, and the gallon is exactly 231 cubic inches. With the inch fixed at 25.4 mm, 231 × 25.4³ ÷ 128 ÷ 1,000 = 29.5735295625 mL (NIST Handbook 44, Appendix C).
US measures in milliliters
- ½ fl oz = 1 US tablespoon = 14.79 mL
- 8 fl oz = 1 US cup = 236.59 mL
- 12 fl oz can = 354.88 mL, printed on US cans as 355 mL
- 16 fl oz = 1 US pint = 473.18 mL
- 32 fl oz = 1 US quart = 946.35 mL
oz to ml chart
| US fluid ounces | Milliliters |
|---|---|
| 1 | 29.5735295625 |
| 2 | 59.147059125 |
| 6 | 177.441177375 |
| 8 | 236.5882365 |
| 12 | 354.88235475 |
| 32 | 946.352946 |
Half ounces follow the same rule: 8.5 fl oz is 251.375 mL.
Why labels say 30 mL and 240 mL
US nutrition labels round on purpose. For serving sizes, 21 CFR 101.9 sets 1 fl oz at 30 mL and a cup at 240 mL, so a label reads "8 fl oz (240 mL)". The real volume of 8 US fl oz is 236.5882365 mL, 3.4117635 mL less.
That rounding is fine for nutrition facts. For a recipe that scales up, the 1.4% gap adds up: 64 fl oz is 1,892.71 mL, not 1,920 mL.
Imperial fluid ounces in British recipes
A British recipe that says "8 fl oz" means imperial fluid ounces of 28.4130625 mL each, 1/160 of the 4.54609-liter imperial gallon (official imperial tables). 8 imperial fl oz is 227.3045 mL, which is 9.2837365 mL less than 8 US fl oz.
The pints differ even more, because an imperial pint holds 20 imperial fl oz (568.26 mL) and a US pint 16 US fl oz (473.18 mL). Use the imperial options in the volume converter for British amounts.
Ounces of weight are not fluid ounces
A recipe line such as "8 oz cheese" or "8 oz flour" means weight: 8 oz on a scale is 226.8 g. Only for water and similar liquids does a fluid ounce of liquid weigh about an ounce.
For dry ingredients, convert the weight with ounces to grams, or use the cooking converter to turn a volume of a named ingredient into grams. For the reverse direction, use ml to oz.
Worked examples
6 fl oz to mL
- US fluid ounces (fl oz)
- 6 fl oz
- Milliliters
- 177.441177375 mL
Checked against: Exact-fraction computation from the legal unit definitions
32 fl oz to mL
- US fluid ounces (fl oz)
- 32 fl oz
- Milliliters
- 946.352946 mL
Checked against: Exact-fraction computation from the legal unit definitions
Questions
How many milliliters are in one US fluid ounce?
1 fl oz is about 29.5735295625 mL. US fluid ounce: 1 US fl oz = 1/128 US gal = 29.5735295625 mL. These values are exact.
How do I convert US fluid ounces to milliliters?
Multiply by 29.5735295625: 8 fl oz × 29.5735295625 ≈ 236.588237 mL. To convert back, divide by the same factor. The factor shown may be rounded.
How can I estimate US fluid ounces in milliliters without a calculator?
Multiply by 30. This is 1.4% above the exact factor (about 29.5735295625), so 8 fl oz comes out as 240 mL instead of 236.5882 mL.
About this calculator
Sources
Checked against references
This calculator includes 3 worked examples with independently sourced answers. They run in the test suite, and you can run them here too.