I need help understanding something. I just want to be able to know if I want to brew 1, 3, 5, or bigger gallon batches how many of each type of ingredients to add. Like make my own recipe. For example I want to brew 5 gallons and I just buy hops and grains how do I know how much to buy. I do know that different beers take different amounts but is there a website or chart I can kind of look at that says "you need this much hops, this much grain or DME." maybe a chart that would help me find a reasonable substitute for something in a recipe to kind of make it my own.