Ounces to Milliliters Converter
Use our free ounces to milliliters converter to instantly convert fluid ounces (fl oz) to milliliters (mL). Enter a value in ounces to get the accurate mL result, plus quick reference formulas and conversion examples.
What is an Ounces to Milliliters Converter?
An ounces to milliliters converter is a tool that converts fluid ounces (fl oz) into milliliters (mL). This is useful for cooking, nutrition labels, drink measurements, and international recipes where milliliters are the standard unit.
If you’re searching for an oz to ml converter online, the conversion depends on which ounce system you mean. Most people mean US fluid ounces, where 1 fl oz equals 29.5735295625 mL. This converter uses that standard and formats results so they’re easy to read.
Ounces to Milliliters Formula
To convert ounces to milliliters, multiply the number of US fluid ounces (fl oz) by 29.5735295625.
This is based on the US fluid ounce. If you’re using UK/Imperial fluid ounces, the factor is different.
A quick reference: 1 US fluid ounce is about 29.57 mL when rounded to 2 decimals.
A common beverage conversion: 12 fl oz is about 354.88 mL.
How to Convert Oz to mL
- 1
Confirm you’re using fluid ounces (fl oz) for volume (not ounces by weight).
- 2
Enter the number of fluid ounces (fl oz) you want to convert.
- 3
Multiply the ounces by 29.5735295625 to get milliliters (mL).
- 4
Round the result to the number of decimals you need (often 0–2 for cooking).
Frequently Asked Questions
Multiply fluid ounces by 29.5735295625. Formula: mL = fl oz × 29.5735295625.
Divide milliliters by 29.5735295625 to get US fluid ounces: fl oz = mL ÷ 29.5735295625.
1 US fluid ounce equals 29.5735295625 mL (about 29.57 mL rounded).
Not always. “Oz” can mean ounces by weight, while “fl oz” means fluid ounces (volume). For oz to mL conversion, you want fluid ounces (fl oz).
Because there are US and Imperial (UK) fluid ounces. This converter uses the US fluid ounce, which is the most common for US labels and many recipes.