Cups to quarts (qt) conversion factors are listed below (for US, UK and for both fluid and dry measurements). To find out how many quarts in cups, multiply by the conversion factors.
1 Cup [US] = 0.25 (1/4) Quart [Fluid, US]
1 Cup [US] = 0.21484175 Quart [Dry, US]
1 Cup [Metric] = 0.22 Quart [UK]
There is a quarter (1/4 or 0.25) fluid quart in a cup, because from the smallest to the largest units between cup to quart, cup is a half (1/2) of a pint and pint is half (1/2) of a quart, that makes 1/2 * 1/2 = 1/4 quarts in a cup.
For example, to calculate how many quarts there are in 12 cups, multiply the cup value by the conversion factor, 12 cups * 1/4 (qt in 1 cup) = 3 quarts in 12 cups.
Cup is a metric and US customary volume unit. The imperial and Canadian cups are replaced by metric cups. 1 metric cup is 250 ml (1/4 litre), 1 US cup is 236.58 ml, 1 imperial cup is 284.13 ml and the Canadian cup is 227.3 ml.
Quart is an imperial and US customary unit. 1 US fl. quart approximately equals to a liter (1 L is 1000 ml and 1 US fl. quart is 946.3 ml). US dry quart is 1101.2 ml. Imperial (UK) quart is the largest and equals to 1136.5 ml. 1 Imperial quart is 1.2 US fluid quarts. The abbreviation is "qt".