Which fat percentage does this cup-to-gram table assume?

The standard full-fat variant unless otherwise noted. Expect 1–3 g per cup difference for reduced-fat or skim.

Does Milk, 2% density change after the container has been opened for several days?

Marginally. Butterfat can separate or bloom, but measured weight per cup/mL stays within 1 % as long as the product is within its use-by date.

By Fidamen-Chefsolver Team | Reviewed by Chefsolver Staff

Milk, 2%; reduced-fat milk with about 2% milkfat.

Ingredient

Weigh for baking, sauces, or beverages; skim off foam if measuring by volume.

Which fat percentage does this cup-to-gram table assume?: The standard full-fat variant unless otherwise noted. Expect 1–3 g per cup difference for reduced-fat or skim.
Does Milk, 2% density change after the container has been opened for several days?: Marginally. Butterfat can separate or bloom, but measured weight per cup/mL stays within 1 % as long as the product is within its use-by date.