How Many Calories And Protein Are In An Egg? | Egg Nutrition

Eggs have a reputation for being fatty, maybe even calorie-dense. The truth is a large egg packs just 72 calories while delivering high-quality complete protein — less energy than a single apple.

So when people ask how many calories and protein are in an egg, the answer depends on size but stays in the same lean ballpark. This article breaks down the numbers for every common egg size and explains why egg protein is a standout option for your diet.

Calorie Counts by Egg Size

A large egg (50 grams) holds about 72 calories. That’s the standard reference used in most recipes and nutrition labels. Eggs come in several sizes, and the difference between a small egg and a jumbo egg is roughly 35 calories.

A medium egg (44 grams) runs about 63 calories. Extra-large (56 grams) lands around 80, and a jumbo egg (63 grams) pushes 90. If you’re tracking calories closely, size matters — a two-egg breakfast can vary by 20–40 calories depending on which size you grab.

Sticking with large eggs simplifies tracking for most people. Cooking method adds minimal calories unless you use butter or oil for scrambling or frying. Hard-boiled eggs keep the count exactly as shown.

Where the Protein Lives: White vs. Yolk

If you’ve been tossing yolks to save calories, you’re also tossing almost half the protein. A large egg’s 6.3 grams of protein split into 3.6 grams in the white and 2.7 grams in the yolk. Here’s what each part delivers.

• Egg white (17 calories): 3.6 grams of protein, zero fat, and most of the egg’s riboflavin. Ideal for strict low-fat or low-calorie plans.
• Egg yolk (55 calories): 2.7 grams of protein plus the majority of the egg’s fat and nearly all its vitamins A, D, E, and choline. Yolks are nutrient-dense, not empty calories.
• Whole egg vs. whites alone: Two large egg whites give you 7.2 grams of protein for 34 calories. One whole egg gives 6.3 grams for 72 calories. Whites win on calorie efficiency, but yolks add nutrients you cannot get from whites alone.
• Complete protein status: Both the white and the yolk contain all nine essential amino acids. That makes the whole egg a complete protein — a term for foods that supply all the amino acids your body cannot make on its own.

The takeaway: if you’re after maximum protein per calorie, whites win. But whole eggs provide a balanced nutrient profile that many nutrition experts recommend including. It depends on your goals.

What Makes Egg Protein So Efficient

Egg protein is considered a complete protein because it contains all nine essential amino acids in proportions that match human needs well. This is reflected in its high PDCAAS score — the standard measure of protein quality — which for eggs is near the top of all foods.

Cooking improves protein absorption. Denaturing the protein structure during cooking makes amino acids more available to digestive enzymes. Cooked eggs have a bioavailability of about 91%, while raw eggs are only 51% bioavailable, meaning you get nearly twice the protein from the same cooked egg.

For a detailed breakdown of calories by cooking method, the calories in a large egg guide from Healthline covers scrambled, poached, and fried variations. The numbers shift slightly with added fats, but the protein content stays constant regardless of how you cook it.

Egg Size	Weight (grams)	Calories	Protein (g)
Small	~38	55	~5
Medium	44	63	~5.5
Large	50	72	6.3
Extra-large	56	80	7
Jumbo	63	90	~7.5

As the table shows, protein scales roughly with weight. A jumbo egg provides about 1 gram more protein than a large one, which can add up if you eat multiple eggs daily.

Choosing Between Conventional and Organic Eggs

Not all eggs are the same behind the nutrition label. Some research suggests that organic eggs may offer modest nutritional advantages over conventional ones, especially in fat composition.

1. Nutritional differences: A peer-reviewed study (PMC9102658) found that organic eggs have higher concentrations of beneficial nutrients, including omega-3 fatty acids and certain vitamins. The difference is moderate but consistent across samples.
2. Protein content: Both organic and conventional eggs provide roughly the same amount of protein per egg. The main differences are in fatty acid profile and micronutrient density, not in protein quantity.
3. Amino acid profile: Egg source influences some amino acids but not all. Research shows effects on certain amino acid levels, while arginine and histidine remain stable across production methods.

For most people, the protein and calorie numbers stay the same regardless of label. If you prioritize fatty acid composition or prefer organic farming practices, organic eggs add value beyond the macronutrient numbers.

Practical Takeaways for Your Diet

If your goal is to increase protein without adding many calories, eggs are a solid option. A two-egg breakfast provides about 12–14 grams of protein for only 144–160 calories, depending on egg size and whether you eat both yolk and white.

Pair eggs with other protein sources to round out meals. A spinach and egg scramble adds fiber and vitamins. Egg protein is highly digestible, so your body can use it efficiently for muscle repair, satiety, or maintaining energy levels throughout the day.

You can find the full comparison of conventional vs. organic egg composition in the organic eggs higher nutrition study hosted by NIH. That review notes organic eggs contain more omega-3s and vitamins, though the protein numbers remain essentially the same.

Component	Calories	Protein (g)	Fat (g)
Egg white (large)	17	3.6	0
Egg yolk (large)	55	2.7	4.5
Whole egg (large)	72	6.3	4.8

The Bottom Line

Eggs are a low-calorie, high-protein food that fits into most eating patterns. A large egg delivers 72 calories and 6.3 grams of high-quality protein. Choosing whole eggs gives you the full nutrient package, while egg whites offer the highest protein density. Cooking method and egg size are the main variables that shift the numbers slightly.

For personalized protein targets or dietary restrictions, a registered dietitian can adjust egg servings to match your specific daily needs and any relevant bloodwork values.