How many milliliters are in an ounce?


Quick Answer

There are approximately 29.574 milliliters (mL) per US liquid ounce (fl. oz). To convert a volume measurement in ounces to milliliters, simply multiply it by 29.574.

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Full Answer

Ounces that measure volume are called fluid ounces. They are part of the imperial system of measurement, while milliliters are a metric unit of measurement. Fluid ounces are widely used in the United States, one of the few countries that still operates primarily on the imperial system. Most countries have adopted the metric system, which measures volume primarily with liters. A milliliter is equal to exactly one-thousandth of a liter. Volume can also be measured with cubic meters or a related unit with the metric system.

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