Used a couple of US recipes recently and most of the ingredients are in cups, or spoons, not by weight. This is a nightmare to convert. Do Americans not own scales or something? What’s the reason for measuring everything by volume?
Most Americans I know don’t even have a scale in their kitchen!
I (an American) always wonder what a cup of spinach is. Like I can really pack it into a cup or not and there is a huge difference.
The things people drink out of are many different sizes of course, but when the word “cup” is used in the context of a measure of volume, then yes, they’re called “measuring cups”, and the volume is standardized.
Same thing with teaspoons and tablespoons. They’re not just any random spoon - when talking about measurements, they have a standardized volume and you need to use a cheap and ubiquitous measuring device if you want to follow a recipe precisely.
Most people in USA do not have a scale in their kitchen, but we do have a measuring cup and a set of measuring spoons.
A measuring cup is a specific size, about 237mL. There’s a whole system of US measurements, actually:
3 teaspoons in a tablespoon
2 tablespoons in an ounce
8 ounces in a cup
2 cups in a pint
2 pints in a quart
4 quarts in a gallon
Not all cups are measuring cups; if you are having a cup of coffee that doesn’t mean your cup is exactly 8oz. You just infer from context that if someone is talking about ingredients then you should measure them with a measuring cup. (Very commonly you also see cups with graduated markings, which are US Imperial on one side and metric on the other, that go up to 2 cups/500mL.)