When I write recipes, I use a common practice of equating a US cup with 240 mL, even though it is really about 237 mL, because it breaks down easier into 1/4 cup = 60 mL, 1/3 c = 80 mL, 1/2 cup = 120 mL.
Similarly, we make 1 US oz = 30 grams or 30 mL, even though it is really 28.35. It makes...