What is 300 grams of flour. cup measurement?
1 US cup = approx 100 grams, so 3 c.. is approx 300 g. That should be good enough for most recipes. If you are baking a very delicate cake, then you'll need a food scale.
Depends where you are, in Australia 1 cup is 250gr so 300 would be 1 1/3 cups.
The Lord Humungus.
It varies, because a cup measures volume, while grams measure weight. There isn't a universal to convert such solids.
128 grams is one cup. Check out this link. https://www.reference.com/food/much-one-cup-flour-grams-6a7fcb77b0ee7465
I think 1 1/2 cups, but you also have to consider if the flour is sifted or not.