* Quarts (qt) measure volume, typically of liquids.
* Pounds (lbs) measure weight or mass.
To convert between these, you need to know the density of the substance being measured. For example:
* Water: 1 quart of water weighs approximately 2.08 pounds.
* Milk: 1 quart of milk weighs approximately 2.15 pounds.
So, you can't say "3 quarts equals X pounds" without knowing what substance those quarts are measuring.