Ounces to Fluid Ounces Conversion Calculator

Enter the weight in ounces below to calculate the volume in fluid ounces.


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Result in Fluid Ounces:

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1 oz = 0.958611418535 fl oz

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How to Convert Ounces to Fluid Ounces

Since ounces are a unit of mass and fluid ounces 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 fluid ounces of an ingredient or substance, we must either multiply or divide by its density, depending on which direction we are performing the conversion.

While they sound similar, ounces and fluid ounces are different forms of measurement. Ounces are a measure of the weight of a solid object, and fluid ounces are a measure of liquid volume.

Both units are also measured in different ways. To get a measurement in ounces, you might use a scale, while to get a measurement in fluid ounces, you might use a measuring cup to measure the volume of liquid it contains.

Although they're different, you can convert from one measurement to the other using a conversion formula.

Ounces to Fluid Ounces Formula

To convert a measurement in ounces to fluid ounces, 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 fluid ounce (oz/fl oz).

If the density is given in grams per milliliter (g/mL), then first multiply the density by 1.0432 to convert to oz/fl oz.

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

fluid ounces = ounces / 1.0432 × density

Thus, the volume in fluid ounces is equal to the weight in ounces divided by 1.0432 times the density (in g/mL) of the ingredient, substance, or material.

For example, here's how to convert 5 ounces to fluid ounces for an ingredient with a density of 0.7 g/mL.
fluid ounces = 5 oz / 1.0432 × 0.7 g/mL = 6.8472 fl oz

When to Convert Ounces to Fluid Ounces

Ounces and fluid ounces 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.

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 Fluid Ounce?

The US fluid ounce is a unit of volume equal to 1/16 of a pint or 1/8 of a cup. The fluid ounce is sometimes referred to as just an "ounce" but should not be confused with the unit of weight. One fluid ounce is equal to approximately 29.5735 milliliters, but in nutrition labeling, one fluid ounce is rounded to exactly 30 milliliters.[4]

The fluid ounce is a US customary unit of volume. Fluid ounces can be abbreviated as fl oz, and are also sometimes abbreviated as oz fl. For example, 1 fluid ounce can be written as 1 fl oz or 1 oz fl.

Learn more about fluid ounces.

Ounce to Fluid Ounce Conversion Table

Ounce measurements converted to fluid ounces for commonly used cooking and baking ingredients.
Weight in Ounces: Volume in Fluid Ounces of:
Water Milk Cooking Oil All Purpose Flour Granulated Sugar
1 oz 0.958611 fl oz 0.930691 fl oz 1.0893 fl oz 1.8121 fl oz 1.134 fl oz
2 oz 1.9172 fl oz 1.8614 fl oz 2.1787 fl oz 3.6242 fl oz 2.268 fl oz
3 oz 2.8758 fl oz 2.7921 fl oz 3.268 fl oz 5.4364 fl oz 3.4019 fl oz
4 oz 3.8344 fl oz 3.7228 fl oz 4.3573 fl oz 7.2485 fl oz 4.5359 fl oz
5 oz 4.7931 fl oz 4.6535 fl oz 5.4467 fl oz 9.0606 fl oz 5.6699 fl oz
6 oz 5.7517 fl oz 5.5841 fl oz 6.536 fl oz 10.87 fl oz 6.8039 fl oz
7 oz 6.7103 fl oz 6.5148 fl oz 7.6253 fl oz 12.68 fl oz 7.9379 fl oz
8 oz 7.6689 fl oz 7.4455 fl oz 8.7146 fl oz 14.5 fl oz 9.0718 fl oz
9 oz 8.6275 fl oz 8.3762 fl oz 9.804 fl oz 16.31 fl oz 10.21 fl oz
10 oz 9.5861 fl oz 9.3069 fl oz 10.89 fl oz 18.12 fl oz 11.34 fl oz
11 oz 10.54 fl oz 10.24 fl oz 11.98 fl oz 19.93 fl oz 12.47 fl oz
12 oz 11.5 fl oz 11.17 fl oz 13.07 fl oz 21.75 fl oz 13.61 fl oz
13 oz 12.46 fl oz 12.1 fl oz 14.16 fl oz 23.56 fl oz 14.74 fl oz
14 oz 13.42 fl oz 13.03 fl oz 15.25 fl oz 25.37 fl oz 15.88 fl oz
15 oz 14.38 fl oz 13.96 fl oz 16.34 fl oz 27.18 fl oz 17.01 fl oz
16 oz 15.34 fl oz 14.89 fl oz 17.43 fl oz 28.99 fl oz 18.14 fl oz
17 oz 16.3 fl oz 15.82 fl oz 18.52 fl oz 30.81 fl oz 19.28 fl oz
18 oz 17.26 fl oz 16.75 fl oz 19.61 fl oz 32.62 fl oz 20.41 fl oz
19 oz 18.21 fl oz 17.68 fl oz 20.7 fl oz 34.43 fl oz 21.55 fl oz
20 oz 19.17 fl oz 18.61 fl oz 21.79 fl oz 36.24 fl oz 22.68 fl oz
21 oz 20.13 fl oz 19.54 fl oz 22.88 fl oz 38.05 fl oz 23.81 fl oz
22 oz 21.09 fl oz 20.48 fl oz 23.97 fl oz 39.87 fl oz 24.95 fl oz
23 oz 22.05 fl oz 21.41 fl oz 25.05 fl oz 41.68 fl oz 26.08 fl oz
24 oz 23.01 fl oz 22.34 fl oz 26.14 fl oz 43.49 fl oz 27.22 fl oz
25 oz 23.97 fl oz 23.27 fl oz 27.23 fl oz 45.3 fl oz 28.35 fl oz
26 oz 24.92 fl oz 24.2 fl oz 28.32 fl oz 47.12 fl oz 29.48 fl oz
27 oz 25.88 fl oz 25.13 fl oz 29.41 fl oz 48.93 fl oz 30.62 fl oz
28 oz 26.84 fl oz 26.06 fl oz 30.5 fl oz 50.74 fl oz 31.75 fl oz
29 oz 27.8 fl oz 26.99 fl oz 31.59 fl oz 52.55 fl oz 32.89 fl oz
30 oz 28.76 fl oz 27.92 fl oz 32.68 fl oz 54.36 fl oz 34.02 fl oz
31 oz 29.72 fl oz 28.85 fl oz 33.77 fl oz 56.18 fl oz 35.15 fl oz
32 oz 30.68 fl oz 29.78 fl oz 34.86 fl oz 57.99 fl oz 36.29 fl oz
33 oz 31.63 fl oz 30.71 fl oz 35.95 fl oz 59.8 fl oz 37.42 fl oz
34 oz 32.59 fl oz 31.64 fl oz 37.04 fl oz 61.61 fl oz 38.56 fl oz
35 oz 33.55 fl oz 32.57 fl oz 38.13 fl oz 63.42 fl oz 39.69 fl oz
36 oz 34.51 fl oz 33.5 fl oz 39.22 fl oz 65.24 fl oz 40.82 fl oz
37 oz 35.47 fl oz 34.44 fl oz 40.31 fl oz 67.05 fl oz 41.96 fl oz
38 oz 36.43 fl oz 35.37 fl oz 41.39 fl oz 68.86 fl oz 43.09 fl oz
39 oz 37.39 fl oz 36.3 fl oz 42.48 fl oz 70.67 fl oz 44.23 fl oz
40 oz 38.34 fl oz 37.23 fl oz 43.57 fl oz 72.48 fl oz 45.36 fl oz


  1. National Institute of Standards & Technology, Culinary Measurement Tips, https://www.nist.gov/pml/owm/culinary-measurement-tips
  2. CK-12 Foundation, Introductory Chemistry (CK-12) - 12.6: Mass-Volume Stoichiometry, https://chem.libretexts.org/Bookshelves/Introductory_Chemistry/Introductory_Chemistry_(CK-12)/12%3A_Stoichiometry/12.06%3A_Mass-Volume_Stoichiometry
  3. James Bucki, Troy Ounce vs. Ounce, The Spruce, https://www.thesprucecrafts.com/troy-ounce-vs-ounce-4588158
  4. U.S. Food & Drug Administration, Guidance for Industry: Guidelines for Determining Metric Equivalents of Household Measures, https://www.fda.gov/regulatory-information/search-fda-guidance-documents/guidance-industry-guidelines-determining-metric-equivalents-household-measures

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