Fluid Ounces to Quarts
An instant fluid ounces-to-quarts converter, with the formula and a reference table below.
| Fluid Ounces | Quarts |
|---|---|
| 1 fl oz | 0.03125 qt |
| 2 fl oz | 0.0625 qt |
| 3 fl oz | 0.09375 qt |
| 5 fl oz | 0.15625 qt |
| 10 fl oz | 0.3125 qt |
| 25 fl oz | 0.78125 qt |
| 50 fl oz | 1.5625 qt |
| 100 fl oz | 3.125 qt |
How to use
- Enter a value in the Fluid Ounces field.
- The Quarts figure appears immediately — no button to press.
- Typing in the Quarts field converts back to Fluid Ounces the same way.
- Use the reference table for the values that come up most often.
Fluid Ounces to Quarts formula
The factor from fluid ounces to quarts is 0.03125.
qt = fl oz × 0.03125
Put another way, one fluid ounce is exactly 1/32 of a quart.
Why this factor: the fluid ounce and the quart are both defined against the liter, so dividing one definition by the other gives 0.03125 directly. Both definitions are set out in full below.
To go the other way, divide by 0.03125 — or use the Quarts to Fluid Ounces converter, which is the same calculation reversed.
Worked example
Take 8 fl oz and multiply by the factor 0.03125: the result is 0.25 qt.
8 fl oz × 0.03125 = 0.25 qt
The converter above does this for any value you type, in either direction.
What is a fluid ounce?
A US fluid ounce is a small liquid volume, one eighth of a cup.
Definition: Exactly one 128th of a US liquid gallon, so exactly 29.5735295625 milliliters.
Where it is used: Beverage cans and bottles, cosmetics, and small liquid quantities in the US.
Worth knowing: Measures volume, not weight — a fluid ounce of water weighs about 1.04 avoirdupois ounces. The imperial fluid ounce is 28.41 mL.
What is a quart?
A quart is a quarter of a US gallon — two pints.
Definition: Exactly one quarter of a US liquid gallon, so exactly 0.946352946 liter.
Where it is used: Milk, motor oil, stock and broth, and ice cream in the US.
Worth knowing: Close to a liter but about 5% smaller, which makes it an easy source of recipe error.
Fluid Ounces vs Quarts
The fluid ounce and the quart belong to the same family of units, so converting between them is usually a matter of shifting a decimal point or applying a small whole-number factor.
Frequently asked questions
How many quarts are in a fluid ounce?
One fluid ounce equals 0.03125 quarts.
What is the formula to convert fluid ounces to quarts?
Multiply the number of fluid ounces by 0.03125. To reverse it, divide by 0.03125 instead.
How do I convert quarts back to fluid ounces?
Divide by 0.03125, which is the same as multiplying by 32.
How many quarts are in 10 fluid ounces?
10 fl oz works out to 0.3125 qt.
Is there anything to watch out for with fluid ounces?
Measures volume, not weight — a fluid ounce of water weighs about 1.04 avoirdupois ounces. The imperial fluid ounce is 28.41 mL.
How is the fluid ounce defined?
Exactly one 128th of a US liquid gallon, so exactly 29.5735295625 milliliters.