gosh it depends so much! When DD was between two weeks and six months old, she had reflux/dairy sensitivity/ bottom line, she spit up an entire feeding at least once a day, so between that and using CD I did ten loads every week in a large top loading washing machine. After a move, huge simplification of our lives and wardrobes, and quitting cloth, I was doing about a load a week while it was still warm outside. Now I'm at two or even three per week, for just the two of us. We just wear a lot more layers and even though we re-wear things if they aren't dirty, it seems like there is always the carseat cover or a quilt or a wrap filling up our loads!