# oz to ml

This converter makes instant conversions from US fluid ounces (fl oz) to milliliters (ml). It also provides the conversion steps. To use the converter, please provide a value in the input field. The converter will begin making conversions as the values are being typed in.

A milliliters (ml) is a unit of volume in the International System of Units (SI). In SI, units of measurement are comprised of a base unit and a prefix that describes the magnitude of the unit. The base unit of the milliliters is the liter, and the prefix "milli-" indicates the magnitude 10^{-3}. In other words, a milliliter is liters.

A fluid ounce (fl oz) is a unit of volume in the United States (US) customary system as well as in a few other systems of measurements. However, the sizes of the fluid ounces are different in these measurement systems. The US customary system is still widely used in few counties today. Unlike SI, the relationship between units of measurement within the US customary system is not as clear; it is necessary to know the specific conversions between the units of measurement even within the same system. For example, there are 8 fluid ounces in a cup, and 4 cups in a quart.

### How many milliliters in a fluid ounce?

In the US customary systems, a cup is defined to have 8 fluid ounces and a cup has 236.5882365 milliliters exactly. Therefore, a fluid ounce has = 29.5735295625 milliliters. Based on this definition, there are 29.5735295625 milliliters in a fluid ounce.

### How to convert fluid ounces to milliliters

Based on the definition of 1 fluid ounce being exactly 29.5735295625 milliliters in the US customary system, the fluid ounce to milliliter conversion formula is:

ml = 29.5735295625 × fl oz

Thus, to convert from fluid ounces to milliliters, multiply a value in fluid ounces by 29.5735295625. For example, convert the volume of 3 fluid ounces of drink to milliliters:

3 fl oz = 3 × 29.5735295625 ml = 88.721 ml