There are 0.25 quarts in one cup, meaning that 1 cup is equal to one-quarter of a quart. Equivalently, 1 quart is equal to 4 cups. This is based on US fluid measurement standards where 1 quart equals 32 fluid ounces and 1 cup equals 8 fluid ounces. Thus, dividing the number of cups by 4 gives the equivalent volume in quarts.