A large hard-boiled egg contains about 78 calories. That number holds whether the egg is soft-boiled or hard-boiled, since the cooking time changes the texture but not the calorie content. What does change the count is the size of the egg and whether you eat the whole thing or just the white.
Calories by Egg Size
Most nutrition labels and databases reference a “large” egg, which weighs roughly 50 grams. At 78 calories, it’s one of the more calorie-efficient sources of protein you can find. If you buy a different size, you can estimate using weight as a rough guide: a medium egg (about 44 grams) lands around 63 calories, while a jumbo egg (about 63 grams) comes in closer to 96. The calorie density stays the same; only the portion changes.
Where the Calories Actually Live
The yolk and the white split the calories unevenly. In a large egg, the white contributes only about 17 calories while packing 3.6 grams of protein. The yolk accounts for roughly 55 calories and another 2.7 grams of protein, plus nearly all the fat (about 4.5 grams). So if you’re eating egg whites only, you’re cutting the calories by more than 70% per egg.
That said, the yolk carries most of the egg’s nutritional value beyond protein. A single large boiled egg provides 15.4 micrograms of selenium (about 28% of the daily value) and 0.56 micrograms of vitamin B12 (roughly 23% of the daily value), and the bulk of both nutrients sits in the yolk. Tossing the yolk saves calories but strips out most of the micronutrients.
Boiled vs. Fried: How Cooking Changes the Count
Boiling an egg in water adds zero calories, which is the main advantage over frying. A large fried egg runs about 90 calories, roughly 12 more than a hard-boiled egg, because the pan needs oil or butter. That gap widens if you’re generous with the fat. For one egg the difference is small, but if you eat two or three eggs most mornings, boiling instead of frying saves you 70 to 100 calories a week without changing anything else about your diet.
Soft-Boiled and Hard-Boiled Are Nutritionally the Same
A soft-boiled egg with a runny yolk has the same calories and macronutrients as a fully set hard-boiled egg. The only practical difference is food safety: a fully cooked yolk is more reliable at killing bacteria like salmonella. If you’re meal-prepping eggs in advance or packing them for lunch, hard-boiled is the safer choice, and they hold up better in the fridge. The USDA recommends eating stored hard-boiled eggs within about one week, whether peeled or unpeeled.
Quick Calorie Math for Meal Planning
Because boiled eggs are so consistent in size and calories, they’re easy to work into a calorie target without weighing or measuring anything:
- 1 large egg: 78 calories, 6.3 grams of protein
- 2 large eggs: 156 calories, 12.6 grams of protein
- 3 large eggs: 234 calories, 18.9 grams of protein
Two boiled eggs deliver roughly the same protein as a small chicken breast at a fraction of the prep time. They also keep well, travel easily, and need no condiments to taste good, which is why they show up in so many meal-prep routines. If you’re watching calories closely, pairing a couple of boiled eggs with vegetables or whole-grain toast gives you a filling meal that stays well under 400 calories.