A single large egg contains about 71 calories and 6.3 grams of protein. That makes it one of the most nutrient-dense foods you can eat for under 100 calories, though the final count changes depending on how you cook it and whether you eat the whole egg or just the white.
Whole Egg vs. White vs. Yolk
The calorie split between the white and the yolk isn’t even close. A single egg white has roughly 17 calories and 3.6 grams of protein. That means the yolk carries about 54 calories, nearly three-quarters of the total. The yolk also contains all of the fat (about 5 grams), all of the cholesterol, and most of the vitamins and minerals, including calcium, vitamin D, and vitamin B12.
Egg whites are almost pure protein and water, with virtually no fat. If you’re strictly counting calories, swapping to egg whites saves you about 54 calories per egg. But you’re also leaving behind the most nutritious part. For most people eating a balanced diet, the whole egg is the better choice.
How Cooking Method Changes the Count
A plain boiled or poached egg stays close to that baseline 71 calories because you’re not adding any fat. Once you introduce butter, oil, or milk, the number climbs. Here’s how common preparations compare per 100 grams (roughly two large eggs):
- Hard boiled: 155 calories
- Scrambled (with milk): 149 calories
- Fried (in fat): 196 calories
Scrambled eggs come in slightly lower per 100 grams than boiled because the added milk dilutes the calorie density, but the milk itself adds calories to the total portion. Fried eggs jump to nearly 200 calories per 100 grams because butter or oil gets absorbed during cooking. A single large fried egg typically lands around 90 to 100 calories depending on how much fat you use in the pan. If you fry with cooking spray instead of butter, you’ll stay closer to the boiled egg range.
Protein Quality and Absorption
Eggs are considered one of the highest-quality protein sources available. The 6.3 grams of protein in a large egg contains all nine essential amino acids your body can’t make on its own, in proportions your muscles can use efficiently.
One thing worth knowing: cooking matters for more than just calories. Your body absorbs significantly more protein from a cooked egg than a raw one. Protein digestion from raw eggs is around 40% lower than from cooked eggs. So if you’ve seen fitness influencers cracking raw eggs into smoothies, you’re actually getting less usable protein that way. A simple scramble or hard boil makes the protein far more available to your body.
What Else You Get for 71 Calories
Eggs pack a surprising amount of nutrition into a small package. A single large egg provides a meaningful amount of vitamin D (about 41 IU, which is roughly 6% of the daily recommended intake) and vitamin B12, a nutrient many people fall short on. The yolk is also one of the richest food sources of choline, a nutrient important for brain function and liver health that most adults don’t get enough of.
You also get about 1.6 grams of saturated fat per egg, which is modest. For context, current dietary guidelines suggest keeping saturated fat under about 13 grams per day on a 2,000-calorie diet. Two eggs at breakfast would use up roughly a quarter of that budget, leaving plenty of room for the rest of the day.
Scaling Up: Two, Three, or More Eggs
Since eggs are so often eaten in multiples, here’s a quick reference for large eggs prepared without added fat:
- 1 egg: 71 calories, 6.3g protein
- 2 eggs: 142 calories, 12.6g protein
- 3 eggs: 213 calories, 18.9g protein
A three-egg omelet with no added fat delivers nearly 19 grams of protein for just over 200 calories. Add cheese or cook in butter and you could easily double that calorie count, so the base egg number is only part of the equation. The same applies to scrambled eggs made with cream or butter. The eggs themselves are low-calorie; it’s the extras that add up.
Egg Size Makes a Difference
The 71-calorie figure is based on a large egg, which is the standard size used in nutrition labels and most recipes. But egg sizes vary, and so do the calories:
- Medium egg: roughly 63 calories
- Large egg: 71 calories
- Extra-large egg: roughly 80 calories
- Jumbo egg: roughly 90 calories
The difference between a medium and a jumbo egg is nearly 30 calories. If you’re eating three jumbo eggs instead of three large ones, that’s an extra 57 calories you might not be accounting for. Check the size printed on your carton if precision matters to you.