How to use the quarts to ounces converter
- Enter a number in the Quarts field to convert quarts to oz, or in the Fluid ounces field to convert oz to quarts.
- The result appears immediately below as you type.
- Clear one field before entering a new value in the other to switch conversion directions.
How the conversion works
The US liquid quart is defined as exactly one quarter of a US liquid gallon. Because a US gallon contains 128 fluid ounces, one quart holds exactly 32 fluid ounces. The formula to convert quarts to fluid ounces is:
fluid ounces = quarts x 32
To go the other direction and convert fluid ounces to quarts, divide by 32:
quarts = fluid ounces / 32
For example, if you have 2.5 quarts of broth, multiply 2.5 by 32 to get 80 fluid ounces. If a recipe calls for 48 fluid ounces of milk, divide 48 by 32 to find you need 1.5 quarts.
Common quarts to oz reference table
This table lists frequently used volumes when converting quarts to fluid ounces. These values apply to US liquid measurements only.
| Quarts (qt) | Fluid ounces (fl oz) |
|---|---|
| 0.25 | 8 |
| 0.5 | 16 |
| 1 | 32 |
| 1.5 | 48 |
| 2 | 64 |
| 3 | 96 |
| 4 | 128 |
| 5 | 160 |
Four quarts make one US gallon, which is why 4 qt equals 128 fl oz.
Where this conversion is useful
Cooks and bakers often need to move between quarts and fluid ounces when scaling recipes. A large batch of soup might be measured in quarts, while a smaller portion requires an ounce measurement for precision.
In automotive maintenance, engine oil and coolant are sometimes sold by the quart but added in smaller increments measured in ounces. Knowing that 1 quart equals 32 fluid ounces helps avoid overfilling.
Beverage distributors and home brewers also rely on these conversions. When filling bottles or kegs, switching between bulk quarts and retail fluid ounces ensures accurate labeling and portioning.
US liquid quarts vs dry quarts and imperial quarts
This converter handles US liquid quarts to US fluid ounces only. The US system also includes a dry quart, used for measuring agricultural goods like berries or grain. A US dry quart is about 1.101 liters, slightly larger than the liquid quart at 0.946 liters, and it does not convert to fluid ounces in the same way.
The UK imperial quart is another distinct unit. One imperial quart equals 40 imperial fluid ounces, not 32. If you are working with British recipes or older Commonwealth documents, using a US liquid conversion will give incorrect results. For metric equivalents, see the liters to quarts converter.
Worked examples
| Example | Input | Result |
|---|---|---|
| Half gallon (2 quarts) | Quarts (US liquid): 2 | Fluid ounces: 64; Quarts entered: 2 |
| A standard water bottle (16 fl oz) | Fluid ounces (US): 16 | Quarts: 0.5; Fluid ounces entered: 16 |
| Five quarts of stock | Quarts (US liquid): 5 | Fluid ounces: 160; Quarts entered: 5 |
| One hundred fluid ounces | Fluid ounces (US): 100 | Quarts: 3.125; Fluid ounces entered: 100 |
FAQ
How many fluid ounces are in a quart?
There are exactly 32 US fluid ounces in one US liquid quart. This is derived from the gallon, which contains 128 fluid ounces divided into four quarts.
How do I convert oz to quarts?
Divide the number of fluid ounces by 32. For example, 64 fluid ounces divided by 32 equals 2 quarts.
Is a fluid ounce the same as a weight ounce?
No. A fluid ounce measures volume, while an avoirdupois ounce measures weight. They are only equivalent for water at specific temperatures. This converter deals strictly with fluid ounces.
Does this work for UK imperial quarts?
No. This tool uses US liquid quarts and US fluid ounces. An imperial quart contains 40 imperial fluid ounces, which is a different ratio entirely.
What is half a quart in fluid ounces?
Half a US liquid quart is 16 fluid ounces. This is also equal to one US pint.
Why does the converter only accept one field at a time?
Entering values in both fields simultaneously would create conflicting inputs. Clear one field before typing in the other to switch between quarts to oz and oz to quarts.