How many Quarts in 40 lbs potting soil?

The volume of 40 lbs of potting soil depends on its density, which can vary depending on the brand and composition of the soil. On average, 1 cubic foot of potting soil weighs about 40-50 lbs. There are 4 quarts in a gallon, so for a rough estimate, you could expect around 20-25 quarts in 40 lbs of potting soil.