Does coffee count in terms of the amount of fluid your body needs?

Some say that we need 8 oz. of water 8 times a day. And they usually mean plain water. I have heard some sources say that if you drink coffee, you should drink an 8 oz glass of water to make up for the dehydration that the coffee causes, and then drink an 8 oz glass of water to give your body the liquid that it most likely wanted in the first place.