A single large hard-boiled egg contains about 78 calories. That makes it one of the most nutrient-dense foods you can eat for under 100 calories, packing over 6 grams of protein alongside healthy fats, vitamins, and minerals with virtually zero carbohydrates.
Full Nutrition Breakdown
Here’s what one large hard-boiled egg (about 50 grams) delivers:
- Calories: 78
- Protein: 6.3 g
- Total fat: 5.3 g (1.6 g saturated)
- Carbohydrates: 0.56 g
- Cholesterol: 186 mg
Nearly all the fat and cholesterol sits in the yolk, while the white is almost pure protein. If you eat only the white, you’ll cut the calories roughly in half (about 17 calories per white) but lose most of the vitamins and minerals that make eggs nutritionally interesting.
How Boiled Compares to Fried
Boiling is the lowest-calorie way to cook an egg because nothing is added during cooking. A large fried egg comes in at about 90 calories, roughly 15% more than a boiled egg. That gap widens further if you fry in butter or oil, which can push a single egg past 100 calories. Scrambled eggs prepared with milk and butter climb higher still. If you’re tracking calories closely, boiling or poaching keeps things simple and predictable.
Soft-Boiled vs. Hard-Boiled
The calorie count is the same whether you prefer a runny yolk or a fully set one. Both start with the same egg, and no ingredients are added either way. The one meaningful difference is protein absorption. Lab studies on egg digestibility have found that soft-boiled eggs (with a partially set yolk) have slightly higher protein digestibility than hard-boiled eggs, around 82% versus 76%. Raw eggs score lowest at about 70%. In practical terms, this difference is small, so cook your eggs however you enjoy them most.
Key Nutrients Beyond Calories
A boiled egg is a surprisingly efficient delivery system for several nutrients that many people fall short on. A single large egg provides 147 mg of choline, a nutrient essential for brain function and liver health that most adults don’t get enough of. The recommended daily intake is 550 mg for men and 425 mg for women, so one egg covers roughly a quarter to a third of your daily need.
Eggs are also one of the few food sources of vitamin D and contain meaningful amounts of B12, selenium, and vitamin A. These nutrients are concentrated in the yolk, which is why eating whole eggs offers a substantial nutritional advantage over whites alone.
Cholesterol in Perspective
One large egg contains 186 mg of cholesterol, all of it in the yolk. Current guidance from the Mayo Clinic suggests keeping dietary cholesterol under 300 mg per day, which means a single egg takes up a sizable share of that budget. For most healthy people, eating one to three eggs daily does not significantly raise the risk of heart disease, because the body adjusts its own cholesterol production in response to what you eat. People with existing heart disease or diabetes may want to be more mindful of how many yolks they eat in a given day.
Why Eggs Keep You Full
If you’re eating boiled eggs to manage your weight, the calorie count is only part of the story. A study from the University of Surrey gave 30 men one of three breakfasts with the same total calories: eggs on toast, cereal with milk and toast, or a croissant with orange juice. After the egg breakfast, participants reported significantly more fullness and less hunger than after either of the other meals. More importantly, they ate less the rest of the day. At lunch, the egg group consumed about 160 fewer calories than the cereal group, and by dinner the gap widened to over 300 fewer calories compared to the croissant group.
This satiety effect comes from the combination of protein and fat, which slows digestion and keeps blood sugar stable. For 78 calories, a boiled egg delivers a level of fullness that most snack foods can’t match.
Scaling Up: Multiple Eggs
Since many people eat more than one egg at a time, here’s a quick reference for large hard-boiled eggs:
- 1 egg: 78 calories, 6.3 g protein
- 2 eggs: 156 calories, 12.6 g protein
- 3 eggs: 234 calories, 18.9 g protein
- 4 eggs: 312 calories, 25.2 g protein
Two boiled eggs give you roughly the same protein as a small chicken breast for significantly fewer calories, making them a practical option for high-protein meal plans.
Storage and Meal Prep
Hard-boiled eggs are one of the easiest proteins to prepare in bulk. According to the USDA, they stay safe in the refrigerator for up to 7 days, so you can cook a batch on Sunday and grab them throughout the week. Keep them in their shells until you’re ready to eat. Peeled eggs dry out faster and absorb odors from the fridge. If you do peel them ahead of time, store them in a sealed container with a damp paper towel.