How many cups is 100g of reduced-fat milk (2%)?

100g of reduced-fat milk (2%) (2% milk) is

⅓ cup + 1 tbsp

That's 0.41 US cups, 0.39 metric cups, or 7 level tablespoons.

Worked out from 1 US cup = 244g. Cups are rounded to the nearest kitchen fraction, with what's left over in level tablespoons. If you have scales, weighing is more accurate.

Other amounts of reduced-fat milk (2%)

Where these numbers come from

USDA FoodData Central, SR Legacy, food 01079: “Milk, reduced fat, fluid, 2% milkfat, with added vitamin A and vitamin D”. USDA lists these household measures for it:

1 cup = 244g
1 fl oz = 30.5g
1 quart = 976g

Fractions of a cup are the cup weight scaled down. The tablespoon figure is the cup weight divided by 16, since USDA doesn't list a tablespoon for this ingredient. The teaspoon is a third of the tablespoon. Metric-cup figures assume a 250ml cup, and Australian tablespoons hold 20ml. Weights under 10g are rounded to 0.1g, everything else to the nearest gram. Full source list.