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Volume
Fluid ounces to Quarts
Convert fluid ounces (fl oz) to quarts (qt). Type a value below to see the result update instantly. Reference table and formula included.
Calculator
1 fl oz = 0.03125 qt
Fluid ounces to Quarts Conversion Table
Common values, ready to copy:
| 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 | 0.781249 qt |
| 50 fl oz | 1.5625 qt |
| 100 fl oz | 3.125 qt |
| 1,000 fl oz | 31.25 qt |
Formula
quarts = fluid ounces × 3.12499670e-2
Volume conversions use US customary measure (the cup, fluid ounce, and gallon are US definitions, not imperial). 1 US cup = 236.588 mL, 1 US gallon = 3.785411784 L.
About Fluid ounces and Quarts
Fluid ounces (fl oz): 1/128 of a US gallon, or 29.5735 mL; the UK imperial fluid ounce is slightly different at 28.4131 mL, a remnant of pre-metric British measurement. Common uses: US beverage container sizes (a 12-oz soda can), US liquid recipe measurements, and UK pub measures for spirits (where a 'single' is 25 or 35 mL but historically tracked from imperial fl oz).
Quarts (qt): Two pints, or one quarter of a gallon (the name comes from this — 'quart' from 'quarter'); the US quart is 946 mL, UK imperial quart 1,136 mL. Common uses: Milk and juice container sizes in the US, motor oil, and large cooking measurements (stocks, broths).
How the conversion works
Volume conversions use US customary measure (the cup, fluid ounce, and gallon are US definitions, not imperial). 1 US cup = 236.588 mL, 1 US gallon = 3.785411784 L.
The exact relationship is quarts = fluid ounces × 3.12499670e-2, which the calculator at the top of this page applies in both directions. Type into either field and the other updates immediately.
When this conversion matters
Converting between fluid ounces and quarts comes up wherever volume measurements move between systems — from one country's conventions to another's, from a scientific reference to a practical specification, or from one industry's working unit to another's. The calculator and reference table above cover the everyday range; for unusual values you can type any number into either field.