Taking a 250ml box of full-fat pure milk as an example, its calorie content is around 169.8 kcal. The calorie content of pure milk varies according to its composition and specifications. Nutritionally speaking, every 100ml of milk contains about 66 kcal. In the market, milk is categorized into different brands and sizes, so the exact amount of calories in a box of pure milk depends on the specifications of each box of milk. A 250ml box of pure milk, for example, has about 169.8 kilocalories. Skimmed milk is even lower in calories, with about 35 calories per 100ml. Lactose-free milk also has different calories. It can be seen that while the composition of different pure milk varies, its calorie content also varies. Milk is relatively high in calories, but its nutritional value is also relatively high. It contains more protein and calcium elements, which can supplement the body with high-quality protein and calcium. People who are allergic to milk should not drink milk.