A one-litre bottle
- Milliliters
- 1000
Result Fluid ounces (US): 33.814
- 1,000 mL × 0.033814 = 33.814 fl oz
A litre of water or soda holds about 33.8 US fluid ounces, a little over four US cups.
mL to oz Converter
One milliliter equals 0.033814 US fluid ounces, so divide milliliters by 29.5735 to get fluid ounces. A 500 mL water bottle holds 16.9 fl oz, and a 100 mL travel bottle holds 3.38 fl oz. The factor follows from the US fluid ounce being defined as exactly 29.5735295625 mL.
Milliliters to Fluid ounces (US) conversion table
| mL | fl oz |
|---|---|
| 1 | 0.033814 |
| 2 | 0.067628 |
| 5 | 0.16907 |
| 10 | 0.33814 |
| 20 | 0.67628 |
| 25 | 0.845351 |
| 50 | 1.6907 |
| 100 | 3.3814 |
| 250 | 8.45351 |
| 500 | 16.907 |
| 1,000 | 33.814 |
About this tool
Labels on drinks, cosmetics, medicine bottles and recipes from outside the US give volume in milliliters, while American packaging and many cookbooks use fluid ounces. This converter turns a milliliter figure into US fluid ounces as you type and shows the arithmetic behind it. It uses the US customary fluid ounce of 29.5735 mL, which is what American labels and nutrition panels mean by fl oz. The British imperial fluid ounce is smaller, 28.4131 mL, so a UK recipe in ounces will come out about 4 % different. The ounce here is a volume, not a weight: it does not tell you how many weight ounces a liquid weighs unless you know its density.
How to use it
Type the volume in mL
Enter the milliliter figure from the label or recipe. Decimals such as 7.5 are accepted.
Read the US fluid ounces
The fl oz value and the division used to reach it update while you type.
Swap or share
Use Swap to turn fluid ounces back into milliliters, or Share to send a link that reopens the same value.
Examples
The 100 mL carry-on limit
- Milliliters
- 100
Result Fluid ounces (US): 3.3814
- 100 mL × 0.033814 = 3.3814 fl oz
Airport liquid rules cap containers at 100 mL, which is 3.38 US fluid ounces, usually printed as 3.4 oz on travel bottles.
How it is calculated
fl oz = mL ÷ 29.5735295625
mL- volume in milliliters (cubic centimeters)
fl oz- volume in US customary fluid ounces
The US gallon is defined as 231 cubic inches, and the inch as exactly 2.54 cm. A US fluid ounce is 1/128 of that gallon, which works out to exactly 29.5735295625 mL. Dividing by that number, or multiplying by 0.033814, converts milliliters to fluid ounces with no offset.
When not to use it
- For UK or older Commonwealth recipes, the imperial fluid ounce of 28.4131 mL applies, not the US one.
- For ingredients sold by weight, such as flour or meat, weight ounces need the density, not this volume factor.
Common mistakes
- Multiplying by 29.57 instead of dividing gives an answer about 875 times too large.
- Treating fluid ounces as weight ounces works roughly for water but not for oil, honey or syrup.
Frequently asked questions
How many ounces are in 500 mL?
500 mL is 16.907 US fluid ounces. That is why a standard half-litre water bottle is labelled 16.9 fl oz in the United States.
Why does a 100 mL bottle say 3.4 oz?
100 mL is 3.3814 US fluid ounces, and labels round that up to 3.4 fl oz. Airport security treats the 100 mL and 3.4 oz limits as the same rule.
How many mL are in one US fluid ounce?
Exactly 29.5735295625 mL, usually rounded to 29.57 mL or, on nutrition labels, to 30 mL. The swap direction of this converter uses that exact figure.
Is a UK fluid ounce the same as a US fluid ounce?
No. The imperial fluid ounce is 28.4131 mL, about 3.9 % smaller than the US fluid ounce. 1000 mL is 33.814 US fl oz but 35.195 imperial fl oz.
Does 1 mL of water weigh one gram?
Very nearly, at room temperature. That is why a fluid ounce of water weighs about 29.6 g, a little more than a weight ounce of 28.35 g.
Is a milliliter the same as a cubic centimeter?
Yes. One milliliter is defined as one cubic centimeter, so cc readings on syringes convert to fluid ounces the same way.
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). mL to oz Converter. Tools Directory. Retrieved October 26, 2026, from https://tools.milunir.com/converters/volume/ml-to-oz-converter/
MLA
Tools Directory Editorial Team. “mL to oz Converter.” Tools Directory, 25 Oct. 2026, https://tools.milunir.com/converters/volume/ml-to-oz-converter/. Accessed 26 Oct. 2026.
Chicago
Tools Directory Editorial Team. “mL to oz Converter.” Tools Directory. Last modified October 25, 2026. Accessed October 26, 2026. https://tools.milunir.com/converters/volume/ml-to-oz-converter/.
Link
<a href="https://tools.milunir.com/converters/volume/ml-to-oz-converter/">mL to oz Converter – Tools Directory</a>