The bathroom is a high traffic room in your home. After all, it is more than likely one of the most used rooms in your home. A key first step in planning out your bathroom layout is to take an estimate of the room. You need to plan this in order to know where everything will fit and how much extra space will be left over. Often, drawing a picture can give you a better understanding. Some sites even have 3-D software that allows you to put your measurements in and then create your plan.
http://www.rebath.com