One large egg contains about 72 calories. That’s for a whole egg, shell removed, weighing roughly 50 grams. Most of those calories come from the yolk, while the white is almost pure protein with very little energy.
Yolk vs. White: Where the Calories Live
The yolk and white split the egg’s calories unevenly. A single egg white has only about 17 calories and delivers 3.6 grams of protein with almost no fat (less than 0.08 grams). The yolk packs roughly 55 calories, 4.9 grams of fat, and 2.7 grams of protein. Together, one whole large egg gives you about 6.3 grams of protein and 5 grams of fat, with virtually zero carbohydrates.
If you’re watching calories closely, swapping to egg whites alone cuts the count by more than 75%. But you lose more than just calories. The yolk carries nearly all of the egg’s vitamins and minerals, including vitamin A, vitamin D, vitamin E, and B12. It’s also the sole source of the egg’s cholesterol, at about 210 mg per yolk.
How Egg Size Changes the Count
Not all eggs are created equal. The USDA classifies eggs by weight per dozen, and the differences add up. A large egg (the standard grocery store size) must weigh at least 2 ounces per egg. Here’s how the calorie count shifts across sizes:
- Medium: about 63 calories (minimum 1.67 oz per egg)
- Large: about 72 calories (minimum 2 oz per egg)
- Extra large: about 80 calories (minimum 2.17 oz per egg)
- Jumbo: about 90 calories (minimum 2.42 oz per egg)
Most nutrition labels and recipes assume a large egg. If you buy jumbo eggs, you’re getting roughly 25% more calories (and protein) per egg than the standard figure suggests.
Cooking Method Matters
A boiled or poached egg stays right around 72 calories because you aren’t adding any fat. Frying changes the math. A fried egg cooked in oil or butter typically lands between 90 and 100 calories, depending on how much fat you use. That’s an extra 20 to 30 calories per egg, which adds up fast if you’re making a three-egg breakfast.
Scrambled eggs tend to fall somewhere in between, since most people add a splash of milk or butter. If you scramble with a teaspoon of butter, expect roughly 90 calories per egg. Cooking spray or a nonstick pan keeps you closer to the baseline.
Cooking also affects how much protein your body actually absorbs. A study published in The Journal of Nutrition found that cooked egg protein has a true digestibility of about 91%, compared to just 51% for raw egg protein. So eating eggs raw (as some fitness enthusiasts do) means your body uses only about half the protein. Heat changes the protein’s structure in a way that makes it far easier to digest.
What Else You Get Beyond Calories
Eggs punch well above their weight nutritionally for 72 calories. One large egg provides about 82 IU of vitamin D (roughly 10% of the daily value) and meaningful amounts of B12 and selenium. Eggs are also one of the best food sources of choline, a nutrient important for brain function that most people don’t get enough of.
Pasture-raised eggs offer a slight nutritional edge over conventional eggs. They tend to be higher in vitamins A and E, contain more omega-3 fatty acids (up to five times more in omega-3 enriched varieties), and are lower in cholesterol and saturated fat. The calorie count stays roughly the same regardless of farming method, so any differences are about nutrient quality rather than energy content.
Cholesterol and How Many Eggs to Eat
For years, eggs were blamed for raising blood cholesterol because of their 210 mg of dietary cholesterol per yolk. Current guidelines are more relaxed. The American Heart Association recommends up to one whole egg per day (seven per week) for healthy adults. If you have heart disease or high cholesterol, the recommendation drops to four yolks per week, though egg whites remain unrestricted.
For most people without cardiovascular risk factors, an egg or two a day fits comfortably within a balanced diet. The protein-to-calorie ratio is hard to beat: 6 grams of high-quality protein for just 72 calories makes eggs one of the most efficient protein sources available.