Summarize:

Once you know the ratio for a standard cup of coffee, making more servings is easy. Simply double the ingredients to make 2 cups of coffee instead of 1. Continue adding ingredients in proportion to make the amount of coffee you want. Use the coffee's weight to quickly find out how much water to use. Measure the coffee's weight in ounces using a scale, then multiply that number by 16. This tells you how many fluid ounces of water you need. For grams, multiply the coffee's weight by 16.6945. This gives you the amount of cubic centimeters of water to use. Everyone enjoys coffee in a different way, so the standard cup may taste weak to you. If this is the case, add some extra beans or a small scoop of grounds to your next brew. As long as you keep the amount of water the same, the coffee will come out stronger. For weaker coffee, use the normal amount of grounds or beans. Add more water to dilute the taste. Keep track of how much water you add so that you can recreate the perfect cup of coffee after you figure out what ratio works best for you. Coffee comes in a variety of flavors, so find the one that best suits your taste. Then change the amount of grounds, beans, or water you use to adjust the coffee's strength. As long as you use a scale, you will be able to make your perfect cup of coffee every time.
Multiply your measurements for more servings. Add more grounds or beans for a stronger cup. Use more water to make weaker coffee. Experiment by using different coffee.