One large egg contains about 71 calories. That’s for a whole egg, any basic cooking method aside. It packs 6.3 grams of protein, 5.3 grams of fat, and barely any carbohydrates (under 1 gram), making it one of the most nutrient-dense foods you can eat for its calorie cost.
Calories by Egg Size
Most nutrition labels and databases use a “large” egg as the standard, which weighs roughly 50 grams. If you’re buying a different size, the calorie count shifts accordingly:
- Small: ~54 calories
- Medium: ~63 calories
- Large: ~71 calories
- Extra-large: ~80 calories
- Jumbo: ~90 calories
These numbers are proportional to weight, so if you’re tracking calories closely, egg size matters more than you might expect. A jumbo egg has roughly 25% more calories than a large one.
Where the Calories Come From
Almost all the fat, cholesterol, and micronutrients live in the yolk. The white is mostly protein and water. A single egg white has about 17 calories and 3.6 grams of protein with virtually no fat. The yolk, then, accounts for roughly 54 of those 71 calories, along with all the fat and most of the vitamins.
If you eat only egg whites, you’re cutting calories significantly but also losing more than half the protein and nearly all the beneficial nutrients. A whole egg delivers vitamin B12 (23% of your daily value), selenium (28% of your daily value), and 147 mg of choline, a nutrient most people don’t get enough of that plays a key role in brain function and liver health. Eggs also contain meaningful amounts of vitamin D. All of that is concentrated in the yolk.
How Cooking Changes the Count
A plain hard-boiled egg stays close to that 71-calorie baseline because you’re not adding anything during cooking. Once you introduce fat, the numbers climb. Per 100 grams of cooked egg, the differences are clear: hard-boiled comes in at 155 calories, while fried eggs jump to 196 calories. Scrambled eggs land at 149 calories per 100 grams, though that number depends heavily on whether you add milk or butter.
In practical terms, frying a single egg in a teaspoon of butter or oil adds roughly 35 to 40 calories. Scrambling two eggs with a splash of milk and a pat of butter can push your total past 200 calories easily. The egg itself isn’t the variable. It’s what you cook it in.
Egg Protein Quality
The 6.3 grams of protein in one egg may not sound like much compared to a chicken breast, but egg protein is exceptionally high quality. It scores a perfect 1.0 on the PDCAAS scale, which measures how completely your body can use a protein source. Eggs rank highest among common foods for protein digestibility, beating out beef, milk, and soy on several quality measures. Researchers have long considered egg protein the gold standard for evaluating other protein sources.
That quality matters for satiety, too. A 2017 study comparing egg breakfasts to oatmeal breakfasts found that people who ate two eggs in the morning reported feeling fuller throughout the day. Their levels of ghrelin, the hormone that signals hunger, were measurably lower than in the oatmeal group. So while one egg is only 71 calories, it tends to hold off hunger more effectively than carbohydrate-heavy foods with the same calorie count.
Cholesterol in Eggs
One large egg contains about 186 mg of cholesterol, all in the yolk. For years, dietary guidelines recommended capping cholesterol at 300 mg per day, which made eggs a frequent target. The current Dietary Guidelines for Americans (2020-2025) no longer set a specific cholesterol limit. Instead, they recommend keeping dietary cholesterol “as low as possible without compromising the nutritional adequacy of the diet.” Eggs are listed as a core component of a healthy eating pattern alongside other protein foods.
For most healthy people, eating one to three eggs per day does not significantly raise the risk of heart disease. The cholesterol you eat has a smaller effect on blood cholesterol than once believed. That said, if you have existing heart disease or diabetes, your response to dietary cholesterol may differ, and it’s worth discussing with your doctor.
Specialty Eggs and Calorie Differences
Omega-3 enriched, free-range, pasture-raised, and organic eggs all hover around the same calorie count as conventional eggs. The differences are in micronutrient content, not energy. Omega-3 enriched eggs, for example, come from hens fed flaxseed, algae, or fish oils. A standard egg contains about 30 mg of omega-3 fatty acids, while enriched versions range from 100 to 600 mg. You’re paying more for a better fatty acid profile, not for fewer or more calories.
Pasture-raised eggs from hens that forage outdoors tend to have slightly more vitamin D and deeper-colored yolks, but again, the calorie count stays in the same 70-to-75 range for a large egg.
Eggs Compared to Other Quick Proteins
At 71 calories, one egg gives you 6.3 grams of protein. Here’s how that stacks up against other grab-and-go protein sources:
- One ounce of cheddar cheese: ~113 calories, 7 g protein
- One cup of whole milk: ~149 calories, 8 g protein
- One tablespoon of peanut butter: ~96 calories, 3.5 g protein
- One container of Greek yogurt (5.3 oz): ~100 calories, 17 g protein
Eggs deliver their protein with less caloric baggage than cheese or peanut butter, and they require almost no preparation. Two hard-boiled eggs give you roughly 142 calories and 12.6 grams of complete protein, which is a solid foundation for a meal or snack.