Fluid Ounces to Ounces Conversion Calculator

How to Convert Fluid Ounces to Ounces

By

Joe Sexton

Joe is the creator of Inch Calculator and has over 20 years of experience in engineering and construction. He holds several degrees and certifications.

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Since fluid ounces are a unit of volume and ounces are a unit of mass, 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 fluid ounces and 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 like they might be related, fluid ounces and ounces are actually very different. Fluid ounces are a measure of liquid volume, as the name implies, and ounces are a measure of the weight of a solid object.

These units are also measured differently. To get a measurement in fluid ounces, you might use a measuring cup to measure the volume of liquid it holds, while to get a measurement in ounces, you might use a scale.

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

Fluid Ounces to Ounces Formula

To convert a measurement in fluid ounces to ounces, multiply the volume 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:

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

When to Convert Fluid Ounces to Ounces

Fluid ounces and 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 volume to weight 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 Ounces are in a Fluid Ounce?

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