Question: how much coffee can you make in a chemex?
Answer: Chemex coffee-to-water ratio We recommend starting with a 1:15 coffee-to-water ratio when brewing with the Chemex. In other words, for every 1 gram of coffee, add 15 grams of water, which converts to about 3 tablespoon of coffee for every 1 cup of water. Experiment from there to find the perfect ratio for you.