How Many ml in An Ounce

Fluid ounces to milliliters (fl oz to mL) conversion factors for US customary and imperial measurement systems are listed below. To find out how many milliliters in ounces, multiply by the conversion factor or use the converter if the conversion is from US fluid ounces.

1 Fluid Ounce [US] = 29.5735296 Milliliters
1 Fluid Ounce [UK] = 28.4130625 Milliliters

There are 29.5735296 milliliters in an ounce, because by definition 1 liter equals to the volume of 1 kilogram of water and the same amount of water equals to 33.814 fluid ounces. If you divide the number of milliliters in a liter (1000 ml) by the number of fl. oz in a liter (33.814), that makes 1000 / 33.814 = 29.5735296 ml. in an ounce.

For example, to find out how many milliliters there are in a half fl. ounce, multiply the fl. ounce value by the conversion factor, that makes 1/2 fl oz * 29.5735296 = 14.8 ml. in a half fl. ounce.

For US fluid ounces, (approximately) there are 3.7 ml in 1/8 fl.oz, 7.4 ml in a quarter (1/4) fl.oz, 9.85 ml in 1/3 fl.oz, 19.7 ml in 2/3 fl.oz and 22.2 ml in 3/4 fl.oz.

For UK fluid ounces, (approximately) there are 3.55 ml in 1/8 fl.oz, 7.1 ml in a quarter (1/4) fl.oz, 9.5 ml in 1/3 fl.oz, 18.9 ml in 2/3 fl.oz and 21.3 ml in 3/4 fl.oz.

Fluid ounce is an imperial and US customary volume unit. Fluid ounce is different than ounce which is mass (weight) unit. There are 8 fl. ounces in a cup, 16 fl.oz in a pint, 32 fl.oz in a quart and 128 fl.oz in a gallon. The abbreviation for fluid ounce is "fl. oz.".

Milliliter (millilitre in SI spelling) is a volume unit in metric system. 1 milliliter is 1/1000 of a liter. The abbreviation for milliliter is "mL" or "ml".

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How many ml in 1 oz? The answer is 29.5735296875.
We assume you are converting between milliliter and ounce [US, liquid].
You can view more details on each measurement unit:
ml or oz

The SI derived unit for volume is the cubic meter.

1 cubic meter is equal to 1000000 ml, or 33814.022558919 oz.

Note that rounding errors may occur, so always check the results.

Use this page to learn how to convert between milliliters and ounces.

Type in your own numbers in the form to convert the units!

The millilitre (ml or mL, also spelled milliliter) is a metric unit of volume that is equal to one thousandth of a litre. It is a non-SI unit accepted for use with the International Systems of Units (SI). It is exactly equivalent to 1 cubic centimetre (cm³, or, non-standard, cc).

Note that this is a fluid ounce measuring volume, not the typical ounce that measures weight. It only applies for a liquid ounce in U.S. measurements. provides an online conversion calculator for all types of measurement units. You can find metric conversion tables for SI units, as well as English units, currency, and other data. Type in unit symbols, abbreviations, or full names for units of length, area, mass, pressure, and other types. Examples include mm, inch, 100 kg, US fluid ounce, 6'3", 10 stone 4, cubic cm, metres squared, grams, moles, feet per second, and many more!

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