A single fluid ounce
- Fluid ounces (US)
- 1
Result Milliliters: 29.5735
- 1 fl oz × 29.5735 = 29.5735 mL
One US fluid ounce is defined as 1/128 of a US gallon of 231 cubic inches, which works out to just under 29.6 mL.
oz to mL Converter
One US fluid ounce equals 29.5735 milliliters, so multiply ounces by 29.5735 to get mL. An 8 oz cup is 236.59 mL and a 12 oz can is 354.88 mL. The factor follows from the US gallon of exactly 231 cubic inches divided into 128 fluid ounces.
Fluid ounces (US) to Milliliters conversion table
| fl oz | mL |
|---|---|
| 1 | 29.5735 |
| 2 | 59.1471 |
| 5 | 147.868 |
| 10 | 295.735 |
| 20 | 591.471 |
| 25 | 739.338 |
| 50 | 1,478.68 |
| 100 | 2,957.35 |
| 250 | 7,393.38 |
| 500 | 14,786.8 |
| 1,000 | 29,573.5 |
About this tool
Recipes from American sites, baby bottle markings, cocktail specs and drink labels give liquid volume in fluid ounces, while measuring jugs, syringes and most of the world work in milliliters. This converter takes a US fluid ounce figure and returns milliliters as you type, together with the multiplication behind it. It uses the US customary fluid ounce; the British imperial fluid ounce is about 4 % smaller at 28.41 mL, so a UK recipe needs a different factor. It also converts volume only: an ounce of weight on a kitchen scale is a different unit and cannot be turned into mL without knowing the density of the ingredient.
How to use it
Type the fluid ounces
Enter the volume in US fl oz. Fractions as decimals work, for example 1.5 for a standard jigger.
Read the milliliters
The mL figure and the multiplication that produced it update while you type.
Swap or share
Use Swap to go from mL back to ounces, or Share to send a link that opens with the same value.
Examples
Eight ounces, one US cup
- Fluid ounces (US)
- 8
Result Milliliters: 236.5882
- 8 fl oz × 29.5735 = 236.5882 mL
A US customary cup holds 8 fl oz, about 236.6 mL. Nutrition labels round this to 240 mL.
A 12 oz soda can
- Fluid ounces (US)
- 12
Result Milliliters: 354.8824
- 12 fl oz × 29.5735 = 354.8824 mL
American cans are labelled 12 fl oz; the converted 354.9 mL is why the metric line on the can reads 355 mL.
How it is calculated
mL = fl oz × 29.5735295625
fl oz- volume in US customary fluid ounces
mL- volume in milliliters (cubic centimeters)
The US gallon is defined as exactly 231 cubic inches, and the inch as exactly 2.54 cm, so one gallon is 3,785.411784 mL. A gallon holds 128 fluid ounces, which gives 29.5735295625 mL per fluid ounce. Both scales start at zero, so the conversion is a single multiplication.
When not to use it
- Do not use it for ounces of weight from a scale; dry ounces measure mass, not volume.
- For British or older Commonwealth recipes, the imperial fluid ounce of 28.41 mL applies instead.
Common mistakes
- Rounding to 30 mL per ounce adds about 1.4 %, which is 7 mL on a 16 oz bottle.
- Treating a US cup as 250 mL; the metric cup used in Australia is not the 236.6 mL US cup.
Frequently asked questions
Why do nutrition labels say 1 fl oz is 30 mL?
US food labelling rules allow a rounded 30 mL per fluid ounce for serving sizes. The exact customary value is 29.5735 mL, so labels slightly overstate the metric volume.
How many mL are in a 16.9 oz water bottle?
16.9 US fl oz is about 499.8 mL. The bottle is actually filled to 500 mL, and 16.9 oz is the rounded US label figure for that half liter.
Is a UK fluid ounce the same as a US fluid ounce?
No. The imperial fluid ounce is 28.4131 mL, about 4 % smaller than the US one at 29.5735 mL. The UK pint, though, holds 20 fluid ounces against 16 in the US pint, so the UK pint is larger.
Can I convert ounces of flour or sugar to mL here?
Not directly. Weight ounces measure mass, and turning mass into volume needs the ingredient's density. A cup of flour weighs roughly 4.25 oz while a cup of water weighs about 8.3 oz.
How many fluid ounces make one liter?
One liter is about 33.814 US fluid ounces, the reciprocal of 29.5735 mL divided into 1,000 mL. Use the swap direction to check other milliliter values.
Cite this tool
Using this tool in an assignment, article or report? Copy a citation, or a link for your website.
APA
Tools Directory Editorial Team. (2026, October 25). oz to mL Converter. Tools Directory. Retrieved October 26, 2026, from https://tools.milunir.com/converters/volume/oz-to-ml-converter/
MLA
Tools Directory Editorial Team. “oz to mL Converter.” Tools Directory, 25 Oct. 2026, https://tools.milunir.com/converters/volume/oz-to-ml-converter/. Accessed 26 Oct. 2026.
Chicago
Tools Directory Editorial Team. “oz to mL Converter.” Tools Directory. Last modified October 25, 2026. Accessed October 26, 2026. https://tools.milunir.com/converters/volume/oz-to-ml-converter/.
Link
<a href="https://tools.milunir.com/converters/volume/oz-to-ml-converter/">oz to mL Converter – Tools Directory</a>