A single large egg contains about 72 calories when eaten raw or hard-boiled. That number shifts depending on the egg’s size and how you cook it, but for the standard large egg you’ll find in most cartons, 72 to 78 calories is the range. Nearly all of those calories come from protein and fat, with almost zero carbohydrates.
Calories by Egg Size
Egg sizes are defined by weight per dozen under USDA standards. A large egg (the basis for most nutrition labels) weighs a minimum of 2 ounces. Here’s how the calorie count changes as the egg gets bigger or smaller:
- Medium egg: roughly 63 calories
- Large egg: 72 to 78 calories
- Extra-large egg: roughly 80 calories
- Jumbo egg: roughly 90 calories
These estimates scale with weight. A jumbo egg must weigh at least 2.5 ounces per egg, about 25% heavier than a large, so the calorie count rises proportionally.
Where the Calories Live: Yolk vs. White
The yolk and white contribute very different things. One large egg white has about 17 calories and 3.6 grams of protein, with essentially no fat. The yolk packs roughly 55 calories, 2.7 grams of protein, and all of the egg’s fat. If you eat only egg whites, you’re cutting about 75% of the calories while keeping a good portion of the protein.
The yolk also carries nearly all of the egg’s vitamins and minerals. A whole raw egg provides about 125 milligrams of choline, a nutrient important for brain function and liver health. The egg white, by contrast, contains almost none. So while ditching the yolk saves calories, it removes most of the nutritional value beyond protein.
Full Macronutrient Breakdown
One large hard-boiled egg contains approximately 6.3 grams of protein, 5.3 grams of fat, and just 0.56 grams of carbohydrate. That protein-to-calorie ratio is what makes eggs popular with people watching their weight: you get more than 6 grams of complete protein (containing all essential amino acids) for fewer than 80 calories.
The fat in an egg is a mix of saturated and unsaturated types. About 1.6 grams are saturated, with the rest split between monounsaturated and polyunsaturated fats. One large egg also contains around 186 milligrams of cholesterol, all of it in the yolk. Current dietary guidelines from the USDA recommend keeping cholesterol intake “as low as possible without compromising the nutritional adequacy of the diet,” but they don’t set a specific daily cap or limit how many eggs you can eat.
How Cooking Changes the Count
A boiled egg runs about 78 calories and a poached egg about 71, since neither method adds any fat. The calorie jump comes when you introduce butter, oil, or cooking spray. A fried or scrambled egg typically lands around 90 calories or more, adding 20-plus calories from the cooking fat alone.
If you scramble three eggs in a tablespoon of butter, you’re adding roughly 100 calories from the butter on top of the 216 or so from the eggs themselves. Cooking spray is the lightest option if you want the texture of a fried egg without the extra calories. Poaching and boiling keep the count exactly where it starts.
Choline content also shifts slightly with cooking. A hard-boiled egg retains about 115 milligrams of choline per egg, while a fried egg holds slightly more at around 135 milligrams, likely because the fat from cooking helps preserve or concentrate certain nutrients.
Why Eggs Keep You Full
Eggs score about 50% higher on satiety measures than common breakfast alternatives like cereal or white bread. Research published in the Journal of the American College of Nutrition found that overweight and obese subjects who ate eggs for breakfast reported feeling significantly more satisfied than those who ate a calorie-matched bagel breakfast. The combination of protein and fat digests slowly, which helps stabilize blood sugar and delay hunger through the morning.
This matters practically. If a 78-calorie egg keeps you from snacking on a 200-calorie muffin two hours later, the net effect on your daily intake is significant. For people managing their weight, that satiety-per-calorie ratio is one of the strongest arguments for including eggs in a regular breakfast rotation.
Calorie Comparison With Other Proteins
To put eggs in context: one large egg gives you 6.3 grams of protein for about 78 calories. A single slice of cooked bacon provides roughly 3 grams of protein for about 43 calories, but with far more saturated fat per gram of protein. A cup of Greek yogurt delivers around 15 grams of protein for 100 calories. Three ounces of chicken breast offers about 26 grams of protein for 140 calories.
Eggs aren’t the most protein-dense option calorie for calorie, but they’re among the cheapest and most versatile. They also deliver a broader nutrient package than most other protein sources at that price point, including choline, B vitamins, and fat-soluble vitamins concentrated in the yolk.