WebJul 7, 2022 · To convert 1 cup to a quart, divide the cups by 4, where 4 is a conversion factor. For example, 1 cup to quart calculation: 1 c ÷ 4 = 0.25 qt. 1 Cup to Quart Conversion Equation: 1 c ÷ 4 = 0.25 qt. Other practical conversions include: 1 gallon = 4 quarts, 8 pints, 16 cups, 128 fluid ounces, 3.8 liters.