Fluid Ounces to Quarts Master Metrology Guide: 32, 64 & 128 oz Breakdown
There are exactly 32 fluid ounces in 1 US Liquid Quart (4 cups or 2 pints). 1 US Gallon contains 128 fluid ounces (4 quarts).
Key rules
- 1 US Liquid Quart = 32 Fluid Ounces (946.35 mL)
- 2 US Liquid Quarts = 64 Fluid Ounces (Half Gallon / 1.89 Liters)
- 4 US Liquid Quarts = 128 Fluid Ounces (1 Full Gallon / 3.785 Liters)
- 1 Imperial Quart (UK/Canada) = 40 Imperial Fluid Ounces (1.136 Liters)
The quart is one of the foundational capacity units in customary culinary and beverage volume. The name comes directly from the Latin quartus, meaning "a fourth part" — designating exactly one-fourth of a gallon.
In the United States Customary System, 1 liquid quart contains exactly 32 fluid ounces, 4 standard measuring cups, 2 liquid pints, or 946.353 milliliters (just under 1 metric liter). In grocery packaging, standard tetra-pak cartons of chicken broth, beef stock, oat milk, and almond milk are filled to 32 fl oz (1 quart).
For home canning and pickling, standard quart Mason jars have a nominal capacity of 32 fluid ounces to the brim, with a practical headspace fill line of around 30 to 31 fluid ounces.
Understanding the base ratio of 32 fluid ounces per quart makes scaling soup recipes, stock reductions, and large beverage punch bowls effortless.
Reference matrix
| Input | Output A | Output B | Notes |
|---|---|---|---|
| 16 Fluid Ounces (1 Pint) | 0.50 Quart | 2 Cups (473.18 mL) | Half of a standard quart carton. |
| 32 Fluid Ounces (1 Quart) | 1.00 Quart | 4 Cups (946.35 mL) | Standard store broth / almond milk carton. |
| 48 Fluid Ounces (1.5 Quarts) | 1.50 Quarts | 6 Cups (1.42 Liters) | 3 liquid pints. |
| 64 Fluid Ounces (Half Gallon) | 2.00 Quarts | 8 Cups (1.89 Liters) | Half-gallon milk carton. |
| 128 Fluid Ounces (1 Gallon) | 4.00 Quarts | 16 Cups (3.785 Liters) | Full US gallon jug. |
Frequently Asked Questions
How many fluid ounces are in 1 quart?
There are exactly 32 fluid ounces in 1 US Liquid Quart (4 cups or 2 pints).
How many quarts is 64 oz?
64 fluid ounces is exactly 2 quarts (or 1 half gallon / 8 cups).
Is 1 quart equal to 1 liter?
Almost! 1 US liquid quart is 946.35 mL, which is approximately 94.6% of a liter (53.65 mL less than 1 full liter).