Bottles, cans, cosmetics and medicine cups are labeled in milliliters almost everywhere, while US recipes, drink menus and packaging still use fluid ounces. This converter turns milliliters into US fluid ounces exactly and puts UK fluid ounces, cups and tablespoons alongside — handy when a number on a label doesn’t match what you expected.
How to use the mL to fluid ounces converter
- Enter the volume in Milliliters (mL).
- Read the result in US fluid ounces. Imperial fluid ounces, US cups and US tablespoons are listed underneath.
- The chart covers 1 mL to 2 L, with common container sizes and a column for imperial ounces.
Milliliters to fluid ounces formula
Both factors are exact: the US fluid ounce is 1/128 of a 231-cubic-inch gallon, and the imperial fluid ounce is 1/160 of a 4.54609 L gallon.
Worked example: a can of soda
Step 1. A standard US can holds 355 mL.
Step 2. 355 ÷ 29.5735295625 = 12.004 fl oz.
Result. That's the "12 fl oz" printed on the can. In UK fluid ounces the same can holds 12.49.
Common containers in fluid ounces
| Container | mL | US fl oz | UK fl oz |
|---|---|---|---|
| Miniature bottle | 50 | 1.69 | 1.76 |
| Travel-size toiletry | 100 | 3.38 | 3.52 |
| Measuring cup (US) | 237 | 8.01 | 8.34 |
| European drinks can | 330 | 11.16 | 11.61 |
| US drinks can | 355 | 12.00 | 12.49 |
| US pint glass | 473 | 15.99 | 16.65 |
| Water bottle | 500 | 16.91 | 17.60 |
| “20 oz” soda bottle | 591 | 19.98 | 20.80 |
| Wine bottle | 750 | 25.36 | 26.40 |
| Liter bottle | 1,000 | 33.81 | 35.20 |
| Large spirits bottle | 1,750 | 59.17 | 61.59 |
The 100 mL travel limit
Airport security rules in many countries, including the TSA’s 3-1-1 rule in the US, limit carry-on liquids to containers of 100 mL, written as 3.4 oz. The exact conversion is 3.38 fl oz, so a bottle labeled 3.4 oz (100.55 mL) is technically a hair over 100 mL — the limit refers to the size of the container as labeled, so stick to bottles marked 100 mL or less.
Medicine and baby bottles
Oral syringes and dosing cups are marked in milliliters, and doses for liquid medicines should be measured in mL with the device that comes with the product, not converted to kitchen spoons. A US teaspoon is 4.93 mL and a tablespoon 14.79 mL, but household spoons vary much more than that. Baby bottles usually carry both scales; 120 mL is 4.06 fl oz and 240 mL is 8.12 fl oz.
For medication, follow the dose in milliliters on the label or from your pharmacist. This converter is a unit tool, not dosing advice.
US vs UK fluid ounces
The US fluid ounce (29.57 mL) is about 4% larger than the UK fluid ounce (28.41 mL), yet the US pint (16 fl oz, 473 mL) is smaller than the UK pint (20 fl oz, 568 mL). If a British recipe asks for 10 fl oz, it means half an imperial pint, 284 mL — not 296 mL. For recipes in cups and spoons, the cooking converter handles ingredient weights as well. For bigger volumes, see liters to gallons.
Frequently asked questions
How many fluid ounces are in 100 mL?
100 mL is 3.38 US fluid ounces (3.3814). That is why airport liquid rules are often written as 3.4 oz or 100 mL.
How many mL are in a fluid ounce?
A US fluid ounce is exactly 29.5735295625 mL, about 29.57 mL. An imperial (UK) fluid ounce is 28.4130625 mL.
Is a fluid ounce the same as an ounce of weight?
No. A fluid ounce measures volume and an ounce (avoirdupois) measures mass. They only line up roughly for water: a US fluid ounce of water weighs about 29.5 g, while an ounce of mass is 28.35 g.
Why does my 500 mL bottle say 16.9 fl oz?
500 ÷ 29.5735 = 16.907, which is rounded to 16.9 US fluid ounces. Many drinks are filled to round metric volumes and labeled with the rounded ounce equivalent.
Why do nutrition labels treat 1 fl oz as 30 mL?
US food-labeling rules allow rounded household measures, and the FDA sets 1 fluid ounce at 30 mL for nutrition labels. For precise conversions outside labeling, use 29.5735 mL.