Batter does not care about the shape of the tin, only how much floor it has to spread over. Match the areas and the depth stays about right.
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Paste the ingredient lines from a recipe and it rewrites the numbers. Fractions are fine — 1 1/2 cups, 3/4 tsp, all of it.
Rewritten:
How it works: a cup is a measure of space, not of weight, so a cup of cocoa and a cup of honey differ by a factor of four. Generic converters ignore that and quietly ruin bakes. The weights here follow King Arthur Baking's published table, which is the closest thing to a standard American recipes are written against — your own scoop may land a few grams either side depending on whether you spoon the flour in or dig the cup through the bag, and that difference is exactly why weighing wins. Salt is worth singling out: a teaspoon of table salt weighs roughly twice a teaspoon of Diamond Crystal kosher, so swapping one for the other by volume is how a dish ends up inedible.