The Coffee Golden Rule is: exactly two (2) tablespoons (7 to 9 grams or 2 scoops of a standard coffee measure) of ground coffee beans per six (6) ounces of water.
For 4 cups (6 ounces each) of coffee, measure out 8 generous tablespoons (30 to 35 grams) of fresh ground coffee beans.
You can adjust more of less ground coffee depending on your taste.
It is important to note that the taste of your cup of coffee will be impacted by many variables. Type of water (purified, tap water, how was the water treated), type of grind (the finer, the more extraction, thus the more caffeine and may taste "stronger"), brewing method, coffee itself, and much more.