The phase ratio is coffee to water (or vice versa) in a brewing recipe. For example, 50 percent brew ratio or it = 1: 2 could be used. These factors indicate that the coffee cup is heavier than the coffee powder.
Expanding on the preparation, you can use a 1:15 ratio for PourOver techniques, i.e., 15g of coffee for a 225g cup; nevertheless, you can use 22g of coffee for a 30g or 44g cup using Espresso.
Espresso ratios are now rigorously regulated, and in some parts of the world, they have virtually become a culture.