How much protein is in 2% milk?

2% milk has 3.3 g of protein per 100 g and 8.1 g per 1 cup (244 g). That is 6.6 g of protein per 100 kcal — a modest protein contribution.

Where do these calorie figures come from?

USDA FoodData Central record 171267, “Milk, reduced fat, fluid, 2% milkfat, with added vitamin A and vitamin D” (SR Legacy, FDC SR Legacy 2018-04 + FNDDS 2024-10-31). Energy is USDA nutrient 1008 (Energy, kcal); protein, fat and carbohydrate are read from the same record. USDA data is in the public domain, and the FDC ID above links straight to it.

All foods

Milk and milk alternativesUSDA SR LegacyFDC 171267

Calories in 2% milk

USDA FoodData Central record for “Milk, reduced fat, fluid, 2% milkfat, with added vitamin A and vitamin D” — per 100 g, per every USDA serving size, and next to the other milk and milk alternatives rows.

The short answer

2% milk: 50 kcal per 100 g. 1 cup (244 g) is 122 kcal with 8.1 g of protein. Source: USDA FoodData Central record 171267, "Milk, reduced fat, fluid, 2% milkfat, with added vitamin A and vitamin D".

Per 100 g

Nutrient	Per 100 g	Share of energy
Energy	50 kcal	100%
Protein	3.3 g	26%
Fat	2 g	36%
Carbohydrate	4.8 g	38%

2% milk is 50 kcal per 100 g in USDA FoodData Central (SR Legacy). Of that energy, about 26% comes from protein, 36% from fat and 38% from carbohydrate. That works out to 6.6 g of protein per 100 kcal — a modest protein contribution.

Per serving

The serving sizes USDA lists for this record, priced from the per-100 g figures above. Nothing here is rounded to a “portion” — the gram weight next to each label is what the calories are computed from.

Serving	Weight	Calories	Protein	Fat	Carbs
100 g	100 g	50	3.3 g	2 g	4.8 g
1 cup	244 g	122	8.1 g	4.9 g	11.7 g
1 fl oz	31 g	15	1 g	0.6 g	1.5 g
1 quart	976 g	488	32.2 g	19.5 g	46.8 g

Compared with other milk and milk alternatives

Food	kcal / 100 g	Protein / 100 g	Per serving
Whole milk	61	3.2 g	149 kcal · 1 cup
2% milk	50	3.3 g	122 kcal · 1 cup
Skim milk	34	3.4 g	83 kcal · 1 cup
Chocolate milk (whole)	83	3.2 g	208 kcal · 1 cup
Unsweetened almond milk	15	0.4 g	39 kcal · 1 cup
Sweetened vanilla almond milk	38	0.4 g	91 kcal · 1 cup

Other tables in dairy and egg products

The same numbers for the foods this one usually shares a plate — or a shopping list — with.

Questions about 2% milk

How many calories are in 2% milk?: 2% milk: 50 kcal per 100 g. 1 cup (244 g) is 122 kcal with 8.1 g of protein. Source: USDA FoodData Central record 171267, "Milk, reduced fat, fluid, 2% milkfat, with added vitamin A and vitamin D".
How much protein is in 2% milk?: 2% milk has 3.3 g of protein per 100 g and 8.1 g per 1 cup (244 g). That is 6.6 g of protein per 100 kcal — a modest protein contribution.
Where do these calorie figures come from?: USDA FoodData Central record 171267, “Milk, reduced fat, fluid, 2% milkfat, with added vitamin A and vitamin D” (SR Legacy, FDC SR Legacy 2018-04 + FNDDS 2024-10-31). Energy is USDA nutrient 1008 (Energy, kcal); protein, fat and carbohydrate are read from the same record. USDA data is in the public domain, and the FDC ID above links straight to it.

How calorie.one logs it

Type “2% milk” into calorie.one and the app matches this exact record — “Milk, reduced fat, fluid, 2% milkfat, with added vitamin A and vitamin D” — estimates the grams, and shows the line with its USDA label. You correct the amount; the per-100 g figure is never guessed. That split between recognition and arithmetic is the whole methodology. For the numbers in context, read How much protein do you need per day?.