How Many Calories in a Cup of Milk?

One cup (240ml) of whole milk contains 149 calories, with 8 grams of fat, 12 grams of carbohydrates and 8 grams of protein. Switching to skim cuts calories nearly in half to 83, while plant-based alternatives like oat milk and almond milk fall somewhere in between.

🥛 Calories by Milk Type (1 Cup / 240ml)

🥛 Which Milk Has the Most Protein?

Dairy milk wins by a wide margin at 8 grams of complete protein per cup, regardless of fat content. Soy milk comes closest at 6.3 grams. Oat milk has just 3 grams, and almond milk a measly 1 gram. If protein matters to you, dairy or soy are the only real options.

🥛 Is Whole Milk or Skim Milk Better?

Skim milk has 83 calories vs 149 for whole, a significant difference if you drink multiple cups a day. But recent research has complicated the "low fat is always better" advice. Several large studies found that people who drink whole milk tend to have lower body weight than skim drinkers, possibly because the fat increases satiety and reduces snacking. The science is genuinely unsettled on this one.

🌱 Is Oat Milk Healthier Than Dairy?

Oat milk has become the trendiest dairy alternative, but nutritionally its a mixed bag. At 120 calories per cup, its close to 2% dairy milk in calories but has less than half the protein (3g vs 8g) and more carbs (16g vs 12g). The calcium in oat milk is added during manufacturing and tends to settle at the bottom, you need to shake the carton well to actually get the advertised amount.

📉 Calorie Savings From Switching Milk

Small daily switches compound over time. Replacing one cup of whole milk with unsweetened almond milk saves enough calories over a year to theoretically account for over 12 pounds. Real-world nutrition is never that linear, but the principle holds.

🥛 Most of the World Is Lactose Intolerant

About 68% of the global population has reduced ability to digest lactose after infancy. In East Asia, the rate exceeds 90%. The ability to digest milk as an adult is actually a genetic mutation that became common in European and East African populations about 7,500 years ago because it provided a survival advantage in regions where dairy farming developed. Drinking milk as an adult is the exception, not the norm, for most of humanity.