Quarts to Ounces Converter - (qt to oz)

How to Convert Quarts to Ounces

Since quarts 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 quarts 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.

Quarts to Ounces Formula

To convert a measurement in quarts 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 quart (oz/qt).

If the density is given in grams per milliliter (g/mL), then first multiply the density by 33.3816 to convert to oz/qt.

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

ounces = quarts × 33.3816 × density

Thus, the weight in ounces is equal to the volume in quarts multiplied by 33.3816 times the density (in g/mL) of the ingredient, substance, or material.

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

ounces = 5 qt × 33.3816 × 0.7 g/mL = 116.8357 oz

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

When to Convert Quarts to Ounces

Quarts 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 Quart?

The actual weight of a quart 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 quart.

Quart measurements converted to ounces for commonly used cooking and baking ingredients.
Volume in Quarts:	Weight in Ounces of:
Volume in Quarts:	Water	Milk	Cooking Oil	All Purpose Flour	Granulated Sugar
1/8 qt	4.1727 oz	4.2979 oz	3.672 oz	2.2074 oz	3.5274 oz
1/4 qt	8.3454 oz	8.5958 oz	7.344 oz	4.4147 oz	7.0548 oz
1/3 qt	11.13 oz	11.46 oz	9.7919 oz	5.8863 oz	9.4064 oz
1/2 qt	16.69 oz	17.19 oz	14.69 oz	8.8294 oz	14.11 oz
2/3 qt	22.25 oz	22.92 oz	19.58 oz	11.77 oz	18.81 oz
3/4 qt	25.04 oz	25.79 oz	22.03 oz	13.24 oz	21.16 oz
1 qt	33.38 oz	34.38 oz	29.38 oz	17.66 oz	28.22 oz

What is a Quart?

The US liquid quart is a unit of fluid volume equal to one fourth of a gallon, two pints, or four cups.

The liquid quart should not be confused with the dry quart (US) or the imperial quart, which are different units. However, when someone refers to a volume in quarts, they typically mean the US liquid quart.

The quart is a US customary unit of volume. Quarts can be abbreviated as qt; for example, 1 quart can be written as 1 qt.

Learn more about quarts.

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 also 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.

Quarts to Ounces Conversion Calculator