In Europe, recipes use mainly grams or liters. In the USA, ingredients are mainly measured in cups. My english readers are surely well aware on what a cup is. For those who aren’t, I recommend to buy measuring cups (easily available at Amazon & co) or simply use coffee cup with a content of approximately 2.4dl. In my recipes, I mostly use this unit because it is much easier to work with. Whenever I use European recipes, I will convert the ingredients to cups for your convenience.