oz to mL Converter (Ounces to Milliliters)

How to Convert Ounces to Milliliters

Since ounces are a unit of mass and milliliters are a unit of volume, which are different physical quantities, we need to know one more physical quantity of the ingredient or substance to convert between them. In this case, we need to account for the density of the substance whenever we do a conversion.

Therefore, to convert between ounces and milliliters of an ingredient or substance, we must either multiply or divide by its density, depending on which direction we are performing the conversion.

Ounces to Milliliters Formula

To convert a measurement in ounces to milliliters, divide the weight by the density of the ingredient or material. Note that in order for this to work, the density must be in ounces per milliliter (oz/mL).

If the density is given in grams per milliliter (g/mL), then first divide 28.3495 by the density to convert to oz/mL.

For a density given in g/mL, you can use this simple formula to convert:

milliliters = ounces × 28.3495 / density

Thus, the volume in milliliters is equal to the weight in ounces times 28.3495 divided by the density of the ingredient, substance, or material.

For example, here's how to convert 5 ounces to milliliters for an ingredient with a density of 0.7 g/mL.

milliliters = 5 oz × 28.34950.7 g/mL = 202.4966 mL

This formula is for converting ounces in weight, if you're trying to convert a volume measurement in fluid ounces, try our fluid ounces to milliliters calculator.

When to Convert Ounces to Milliliters

Ounces and milliliters are both commonly used to measure cooking ingredients.

For cooking applications, most chefs suggest measuring dry ingredients by weight rather than volume to improve accuracy in the measurements.^[1] The density of dry ingredients can vary for a variety of reasons, such as compaction and clumping.

The best way to ensure an accurate conversion is to use a scale. When a scale is not available, a calculator like the one above is a good way to estimate the weight to volume conversion.

Another useful application of weight and volume conversions is chemistry. When performing chemical reactions by combining separate chemicals to produce a new chemical, one must know the exact amount of each chemical to add in order to maximize the yield of the reaction.

It is common to mix powdered chemicals with liquid, or aqueous, chemicals, and this is where it becomes very useful to convert between weights and volumes.^[2]

Keep reading to learn more about each unit of measure.

How Many Milliliters Are in a Ounce?

The actual volume of a ounce will vary depending on the density of the material. The table below shows how many milliliters of various wet and dry ingredients are in a ounce.

Ounce measurements converted to milliliters for commonly used cooking and baking ingredients.
Weight in Ounces:	Volume in Milliliters of:
Weight in Ounces:	Water	Milk	Cooking Oil	All Purpose Flour	Granulated Sugar
1 oz	28.35 mL	27.52 mL	32.22 mL	53.59 mL	33.54 mL
2 oz	56.7 mL	55.05 mL	64.43 mL	107.18 mL	67.07 mL
3 oz	85.05 mL	82.57 mL	96.65 mL	160.77 mL	100.61 mL
4 oz	113.4 mL	110.1 mL	128.86 mL	214.36 mL	134.14 mL
5 oz	141.75 mL	137.62 mL	161.08 mL	267.95 mL	167.68 mL
6 oz	170.1 mL	165.14 mL	193.29 mL	321.54 mL	201.21 mL
7 oz	198.45 mL	192.67 mL	225.51 mL	375.14 mL	234.75 mL
8 oz	226.8 mL	220.19 mL	257.72 mL	428.73 mL	268.29 mL
9 oz	255.15 mL	247.71 mL	289.94 mL	482.32 mL	301.82 mL
10 oz	283.5 mL	275.24 mL	322.15 mL	535.91 mL	335.36 mL
11 oz	311.84 mL	302.76 mL	354.37 mL	589.5 mL	368.89 mL
12 oz	340.19 mL	330.29 mL	386.58 mL	643.09 mL	402.43 mL
13 oz	368.54 mL	357.81 mL	418.8 mL	696.68 mL	435.97 mL
14 oz	396.89 mL	385.33 mL	451.02 mL	750.27 mL	469.5 mL
15 oz	425.24 mL	412.86 mL	483.23 mL	803.86 mL	503.04 mL
16 oz	453.59 mL	440.38 mL	515.45 mL	857.45 mL	536.57 mL
17 oz	481.94 mL	467.9 mL	547.66 mL	911.04 mL	570.11 mL
18 oz	510.29 mL	495.43 mL	579.88 mL	964.63 mL	603.64 mL
19 oz	538.64 mL	522.95 mL	612.09 mL	1,018 mL	637.18 mL
20 oz	566.99 mL	550.48 mL	644.31 mL	1,072 mL	670.72 mL
21 oz	595.34 mL	578 mL	676.52 mL	1,125 mL	704.25 mL
22 oz	623.69 mL	605.52 mL	708.74 mL	1,179 mL	737.79 mL
23 oz	652.04 mL	633.05 mL	740.95 mL	1,233 mL	771.32 mL
24 oz	680.39 mL	660.57 mL	773.17 mL	1,286 mL	804.86 mL
25 oz	708.74 mL	688.1 mL	805.38 mL	1,340 mL	838.4 mL
26 oz	737.09 mL	715.62 mL	837.6 mL	1,393 mL	871.93 mL
27 oz	765.44 mL	743.14 mL	869.81 mL	1,447 mL	905.47 mL
28 oz	793.79 mL	770.67 mL	902.03 mL	1,501 mL	939 mL
29 oz	822.14 mL	798.19 mL	934.25 mL	1,554 mL	972.54 mL
30 oz	850.49 mL	825.71 mL	966.46 mL	1,608 mL	1,006 mL
31 oz	878.84 mL	853.24 mL	998.68 mL	1,661 mL	1,040 mL
32 oz	907.18 mL	880.76 mL	1,031 mL	1,715 mL	1,073 mL
33 oz	935.53 mL	908.29 mL	1,063 mL	1,768 mL	1,107 mL
34 oz	963.88 mL	935.81 mL	1,095 mL	1,822 mL	1,140 mL
35 oz	992.23 mL	963.33 mL	1,128 mL	1,876 mL	1,174 mL
36 oz	1,021 mL	990.86 mL	1,160 mL	1,929 mL	1,207 mL
37 oz	1,049 mL	1,018 mL	1,192 mL	1,983 mL	1,241 mL
38 oz	1,077 mL	1,046 mL	1,224 mL	2,036 mL	1,274 mL
39 oz	1,106 mL	1,073 mL	1,256 mL	2,090 mL	1,308 mL
40 oz	1,134 mL	1,101 mL	1,289 mL	2,144 mL	1,341 mL

What Is an Ounce?

One ounce is a unit of mass/weight equal to 1/16 of a pound or 28.349523 grams. The common ounce should not be confused with the troy ounce, which is equal to 1/12 of a troy pound.^[3]

The ounce is a US customary and imperial unit of mass. Ounces can be abbreviated as oz; for example, 1 ounce can be written as 1 oz.

An ounce is frequently referred to as a unit of weight. While technically, an ounce is a measure of mass, and weight is actually a measure of force, the two are equivalent as long as we are performing our calculations on Earth.

For example, an object with a mass of 1 ounce weighs 1 ounce on Earth, but only weighs one-sixth of that on the moon, yet still has the same mass.

Learn more about ounces.

What Is a Milliliter?

The milliliter is a unit of volume equal to 1 cubic centimeter, 1/1,000 of a liter, or about 0.061 cubic inches.^[4]

The milliliter is an SI unit of volume in the metric system. In the metric system, "milli" is the prefix for thousandths, or 10^-3. A milliliter is sometimes also referred to as a millilitre. Milliliters can be abbreviated as mL, and are also sometimes abbreviated as ml or mℓ. For example, 1 milliliter can be written as 1 mL, 1 ml, or 1 mℓ.

Since one milliliter is equivalent to one cubic centimeter, milliliters are sometimes expressed using the abbreviation for a cubic centimeter (cc) for things such as medical dosages or engine displacements.

Learn more about milliliters.

oz to mL Conversion (Ounces to Milliliters)