How much liquid does the human bladder hold?

If you were to ask most women, the answer would probably be “Not enough!” Seriously, the bladder in humans and other mammals is an extremely elastic and expandable muscular sac. The average adult can comfortably hold up to about one-third quart of urine. More urine causes the bladder to become distended and uncomfortable. Each individual is different, of course, so there are wide variations in urine capacity.