What This Converter Does
This tool converts US fluid ounces (fl oz) into milliliters (mL), the metric unit of volume used in most of the world. It relies on the standard relationship that one US fluid ounce equals exactly 29.5735 milliliters. This is handy for following international recipes, reading nutrition labels, mixing drinks, or working in science and medicine where metric measurements dominate.
How to Use It
Enter the number of fluid ounces you want to convert and the result in milliliters appears instantly. You can enter whole numbers or decimals — for example 1.5 fl oz. Note this uses the US customary fluid ounce; the UK (imperial) fluid ounce is slightly different at about 28.4131 mL.
The Formula Explained
The conversion is a simple multiplication: $$\text{mL} = \text{Fluid Ounces} \times 29.5735$$ Because a milliliter is much smaller than a fluid ounce, the milliliter figure is always larger than the ounce figure by a factor of roughly 30.
Worked Example
Suppose a recipe calls for 8 fluid ounces of milk. Multiply: $$8 \times 29.5735 = 236.588 \text{ mL}$$ So 8 fl oz is about 237 mL — essentially one US cup.
FAQ
Is this US or UK fluid ounces? This calculator uses the US customary fluid ounce (\(29.5735\) mL). The UK imperial fluid ounce equals about \(28.4131\) mL.
How many mL is 1 fl oz? One US fluid ounce is \(29.5735\) mL, commonly rounded to 30 mL.
How do I convert mL back to fluid ounces? Divide the milliliter value by \(29.5735\).
