Like I said in a previous post on this subject, I like stronger coffee. 

I know that I use at least 1 cup fine ground coffee (more like 1 1/2 cups) to get one half gallon of coffee. 

I use a Malita # 6 drip container and filter and heat the water in a tea kettle.  Then drip into a pitcher.  This way I don't have a coffee pot, but I can make as much coffee as I want One cup or one gallon. 

I also have an extra blender jar that I only use for coffee, and don't wash out often because it doesn't get dirty. 

I measure the beans by the marks on the blender. 

Of course this is how I like my coffee and haven't found a better tasting way to make it.  I've been doing coffee like this for more than 20 years.