It's important to note that this is a rough conversion, as there are actually two different types of ounces:

* Fluid ounces (fl oz) are used to measure volume, and there are 29.5735 milliliters in one fluid ounce.

* Avoirdupois ounces (oz) are used to measure weight, and there are 28.3495 grams in one avoirdupois ounce.

Since you're asking about converting milliliters to ounces, it's likely you're referring to fluid ounces. However, if you're dealing with a specific context, it's always best to double-check which type of ounce is being used.