A US liquid quart is one quarter of a US gallon.
Quarts to Fluid ounces Converter — qt to fl oz
Convert Quart (qt) to Fluid ounce (fl oz) using the exact conversion factor (1 quart = 32 fluid ounce). See the formula, worked examples, conversion table, unit comparison, history, and common uses.
Quarts to Fluid ounces converter
Converter
Cooking Converter
Convert cooking volume and mass units used in recipes and nutrition workflows.
Context values
Some unit families need one extra value for a physically accurate result.
A US fluid ounce is 1/128 of a US gallon.
Result = input x 0.000946352946 / 2.95735296e-5.
Volume units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Quarts to Fluid ounces
Quart and Fluid ounce both show up in recipes, and converting between them matters whenever a recipe from one country's cookbook needs to be followed with another country's measuring tools. Quart is typically associated with united States (cooking, dairy, motor oil packaging), while Fluid ounce is typically associated with united States (beverage, nutrition labeling).
Formula
fluid ounces = quarts × 32
This factor comes from each unit's defined relationship to the category's base unit: 1 quart equals 0.000946352946 base units, and 1 fluid ounce equals 0.0000295735295625 base units, so dividing one by the other gives the direct quart-to-fluid ounce factor of 32.
Simple example
1 qt × 32 = 32 fl oz
1 quart = 32 fluid ounces.
Real-world example
2 qt × 32 = 64 fl oz
2 quarts = 64 fluid ounces.
Conversion table
| Quart (qt) | Fluid ounce (fl oz) |
|---|---|
| 0.25 qt | 8 fl oz |
| 0.5 qt | 16 fl oz |
| 1 qt | 32 fl oz |
| 2 qt | 64 fl oz |
| 4 qt | 128 fl oz |
| 8 qt | 256 fl oz |
Reverse conversion: Fluid ounce to Quart
32 fl oz × 0.03125 = 1 qt
32 fluid ounces = 1 quart.
quarts = fluid ounces × 0.03125
For a page dedicated to this direction, see Fluid ounce to Quart.
Quart vs. Fluid ounce
| Aspect | Quart | Fluid ounce |
|---|---|---|
| Family | US customary unit | US customary unit |
| Typical use | US recipe measurement (larger liquid volumes) | US beverage container sizing (soda, water bottles) |
| Where it's used | United States (cooking, dairy, motor oil packaging) | United States (beverage, nutrition labeling) |
Understanding the Quart
Quart (qt) measures volume. The US liquid quart is exactly one-quarter of a US gallon: 0.946352946 liters. It is classified as a US customary unit.
Where it's used: United States (cooking, dairy, motor oil packaging)
Uses of the Quart today
- US recipe measurement (larger liquid volumes)
- US motor oil and automotive fluid packaging
- US dairy and beverage packaging (quart containers)
History of the Quart
The quart ('quarter' of a gallon) follows the same English wine-gallon lineage as the US gallon, retained by the US after England moved to a different imperial standard in 1824.
Historical origin. Quart was not the invention of a single named person; it developed through the process described above.
Understanding the Fluid ounce
Fluid ounce (fl oz) measures volume. The US fluid ounce is 1/128 of a US gallon: exactly 29.5735295625 milliliters. It is classified as a US customary unit.
Where it's used: United States (beverage, nutrition labeling)
Uses of the Fluid ounce today
- US beverage container sizing (soda, water bottles)
- US nutrition and medication dosing labels
History of the Fluid ounce
The US fluid ounce follows from the same English wine-gallon system as the rest of the US liquid volume units, defined as a consistent fraction of the gallon.
Historical origin. Fluid ounce was not the invention of a single named person; it developed through the process described above.
Quart — sources
- NIST Handbook 44, Appendix C — General tables of units including the US quart definition.
Fluid ounce — sources
- NIST Handbook 44, Appendix C — General tables of units including the US fluid ounce definition.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many fluid ounces are in 1 quart?
1 quart equals 32 fluid ounces, using the exact defined conversion factor rather than an estimate.
How do I convert quart to fluid ounce?
Multiply the quart value by 32. The converter above does this instantly to whatever precision you set.
How do I convert fluid ounce back to quart?
Use the reverse factor: 1 fluid ounce equals 0.03125 quarts. You can also use the swap control in the converter above to flip the direction instantly.
What is a quart?
Quart (qt) measures volume. The US liquid quart is exactly one-quarter of a US gallon: 0.946352946 liters. It is classified as a US customary unit.
What is a fluid ounce?
Fluid ounce (fl oz) measures volume. The US fluid ounce is 1/128 of a US gallon: exactly 29.5735295625 milliliters. It is classified as a US customary unit.
Is the quart to fluid ounce conversion exact?
Yes. The US fluid ounce is 1/128 of a US gallon: exactly 29.5735295625 milliliters. That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.
Where is the quart still used today?
United States (cooking, dairy, motor oil packaging)