Fluid Ounces to Quarts
Convert fluid ounces (fl oz) to quarts (qt). Both measure capacity and volume, and the conversion comes up in cooking, chemistry, fuel work.
The Formula
``
quarts = fluid ounces × 0.03125
fluid ounces = quarts × 32
`
One fluid ounce is 0.03125 quarts, and one quart is 32 fluid ounces.
Conversion Table
| Fluid Ounces | Quarts |
|---|---|
| 1 fl oz | 0.03125 qt |
| 2 fl oz | 0.0625 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 |
| 500 fl oz | 15.625 qt |
| 1,000 fl oz | 31.25 qt |
The Other Direction
| Quarts | Fluid Ounces |
|---|---|
| 1 qt | 32 fl oz |
| 2 qt | 64 fl oz |
| 5 qt | 160 fl oz |
| 10 qt | 320 fl oz |
| 25 qt | 800 fl oz |
| 50 qt | 1,600 fl oz |
| 100 qt | 3,200 fl oz |
| 500 qt | 16,000 fl oz |
| 1,000 qt | 32,000 fl oz |
What Each Unit Is
Fluid Ounces (fl oz) — the US fluid ounce: exactly 29.5735295625 millilitres. One sixteenth of a US pint, descended from the wine gallon.
Quarts (qt) — a quarter of a US gallon, or 0.946352946 litres. From the Latin quartus, a fourth part of a gallon.
A Sense of Scale
A shot is 1.5 fl oz- A soda can is 12 fl oz
- A US coffee cup is 8 fl oz
- A US quart is just under a litre
- Ice cream is sold by the quart
- A quart is two pints
Precision
The factor 0.03125 is rounded. For engineering work carry more digits than the table above, and round only at the end — rounding at each step compounds.
Watch Out For
- A UK fluid ounce is 28.41 mL — close enough to confuse, far enough to ruin a cocktail.
In Code
`javascript
const fluidOunceToQuart = (value) => value * 0.03125;
``
Where This Conversion Comes Up
- Cooking
- Chemistry
- Fuel
- Beverages
- Medicine
How Many Decimals Do You Need?
Rounding the factor costs accuracy, and how much depends on the factor. Converting 137 fl oz with the factor truncated at each decimal place:
| Decimals kept | Factor | 137 fl oz becomes | Error |
|---|---|---|---|
| 0 | 0 | 0 | 100.0000% |
| 1 | 0 | 0 | 100.0000% |
| 2 | 0.03 | 4.11 | 4.0000% |
| 3 | 0.031 | 4.247 | 0.8000% |
| 4 | 0.0313 | 4.2881 | 0.1600% |
The right number of significant figures is set by your input, not by the converter. If you measured fluid ounces to three significant figures, the answer in quarts is only good to three — writing more digits claims precision the measurement never had.