A single large egg contains about 71 calories. Most of those calories come from the yolk, which holds nearly all the fat, while the white is almost pure protein and water. That makes eggs one of the most nutrient-dense foods you can eat for their calorie cost.
Calories in the White vs. the Yolk
The egg white and yolk split calories unevenly. A large egg white has roughly 17 calories, almost entirely from 3.6 grams of protein. The yolk accounts for the remaining 54 calories, packed with 5.3 grams of fat alongside vitamins, calcium, and cholesterol. If you eat only egg whites, you cut calories by about 75% per egg but lose most of the micronutrients.
Full Macronutrient Breakdown
One large hard-boiled egg provides:
- Protein: 6.3 grams
- Fat: 5.3 grams (1.6 grams saturated)
- Carbohydrates: 0.56 grams
Eggs are essentially a zero-carb food. The protein is highly bioavailable, meaning your body absorbs and uses a large percentage of it. For context, 6.3 grams of protein is roughly what you’d get from an ounce of chicken breast, but with more fat and far more vitamins packed into a smaller package.
How Cooking Changes the Calorie Count
The way you cook an egg can shift the calorie total significantly, mainly because of added fat. Per 100 grams of cooked egg:
- Hard-boiled: 155 calories
- Scrambled: 149 calories
- Fried: 196 calories
Hard-boiled and poached eggs add no extra fat during cooking, so they stay closest to the raw calorie count of about 71 per large egg. Scrambled eggs often include milk or butter, but the added liquid can dilute the calorie density per 100 grams, which is why they appear slightly lower than boiled in a gram-for-gram comparison. The actual calories on your plate depend on what you add.
Frying is where calories climb fastest. A tablespoon of butter or oil adds roughly 100 to 120 calories on top of the egg itself. A single fried egg cooked in a tablespoon of oil lands around 170 to 190 calories total. If you fry in a nonstick pan with cooking spray, you stay much closer to the baseline 71.
Calories by Egg Size
Not all eggs are created equal. The USDA grades eggs by weight, and calorie counts shift accordingly:
- Small: about 54 calories
- Medium: about 63 calories
- Large: about 71 calories
- Extra-large: about 80 calories
- Jumbo: about 90 calories
Nutrition labels and most recipes assume a large egg. If you buy jumbo eggs from a farmers market, you’re getting roughly 25% more calories (and protein) per egg than the standard grocery store large.
How Many Eggs Per Day Is Reasonable
One large egg contains about 186 milligrams of cholesterol, all of it in the yolk. The American Heart Association recommends up to one whole egg per day (or seven per week) for adults without heart disease. If you have heart disease or high cholesterol, the recommendation drops to four yolks per week. Egg whites are unlimited under these guidelines since they contain no cholesterol or fat.
For most healthy adults, eating one to three eggs daily fits comfortably within a balanced diet. At 71 calories each, even three eggs total just over 200 calories while delivering nearly 19 grams of protein. That’s a substantial portion of your daily protein needs for a relatively small calorie investment, which is why eggs are a staple in both weight-loss and muscle-building diets.