Three U.S. liquid quarts equal 12 U.S. cups. Each quart contains four cups, so the conversion is simply 3 × 4 = 12.
Quick conversion table
One quart is 4 cups, two quarts are 8 cups, three quarts are 12 cups and four quarts are 16 cups. This is the U.S. customary kitchen relationship.
When the conversion helps
Suppose a large soup recipe calls for 3 quarts of broth but your measuring cup holds 2 cups. Fill the 2-cup measure six times to reach 12 cups, taking care to read the liquid level at eye height.
What about fluid ounces?
A U.S. cup is 8 fluid ounces and a quart is 32 fluid ounces. Thus 3 quarts contain 96 U.S. fluid ounces. Fluid ounces measure volume, not the weight of the ingredients.
Important measurement distinction
These numbers describe U.S. liquid volume. A U.S. dry quart is a different unit, and an imperial quart has a different volume. If a recipe originates outside the U.S., check which unit system it uses.
Frequently asked question
How many half-cup scoops make 3 quarts?
Twenty-four half-cup scoops equal 12 full cups, or 3 U.S. quarts.
Source and further reading
Reference: National Institute of Standards and Technology.

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