A large egg contains about 6 grams of protein. That’s split between the white and the yolk, with each part contributing a meaningful share. At 74 calories per egg, roughly a third of those calories come from protein, making eggs one of the most protein-dense everyday foods available.
Protein in the White vs. the Yolk
Most people assume the egg white holds all the protein, but that’s not quite right. A large egg white has about 3.6 grams of protein, while the yolk contributes the remaining 2.6 grams. On a gram-for-gram basis, yolk actually contains more protein than the white: 16.4 grams per 100 grams of yolk compared to 10.8 grams per 100 grams of white. The white just happens to make up more of the egg’s total weight.
If you’re tossing yolks to cut calories, you’re also losing nearly half the egg’s protein along with fat-soluble vitamins and minerals. A single egg white has only 18 calories, so egg whites do win on protein per calorie. But unless you’re closely managing calorie intake, whole eggs give you more nutritional value overall.
Protein by Egg Size
Not all eggs are the same size, and the protein content shifts accordingly. Here’s a rough breakdown:
- Medium egg (44 g): about 5 g of protein
- Large egg (50 g): about 6 g of protein
- Extra-large egg (56 g): about 7 g of protein
- Jumbo egg (63 g): about 8 g of protein
When nutrition labels and recipes say “one egg,” they almost always mean a large egg. If you buy extra-large or jumbo from the store, you’re getting a bit more protein per egg than the standard 6-gram figure.
Why Egg Protein Is Exceptionally High Quality
Grams alone don’t tell the full story. Protein quality depends on which amino acids are present and how well your body can absorb them. Eggs score at the top of the scale on both counts.
Scientists measure protein quality using a system called DIAAS (Digestible Indispensable Amino Acid Score). A score of 100 or above means “excellent” quality, meaning the protein provides every essential amino acid your body needs in sufficient amounts. Cooked eggs score above 100 for anyone older than six months, outperforming other common food ingredients tested alongside them in research from the University of Illinois. Eggs are also a solid source of leucine, the amino acid most directly responsible for triggering muscle repair. One extra-large egg provides about 0.6 grams of leucine.
In practical terms, this means 6 grams of egg protein does more for your body than 6 grams of protein from many plant sources, where one or more essential amino acids may be limited.
Raw Eggs Deliver Far Less Protein
If you’ve ever cracked a raw egg into a smoothie thinking you’re getting the full 6 grams, you’re not. Protein digestion from raw eggs is roughly 40% lower than from cooked eggs. That means your body only absorbs and uses about 3.5 grams of the protein in a raw egg, compared to nearly all of it when cooked.
Cooking unfolds the tightly wound protein structures in the egg, making them far easier for your digestive enzymes to break down. Scrambled, boiled, poached, or fried all work. The cooking method doesn’t significantly change the protein content, though frying in oil or butter adds calories from fat.
How Eggs Stack Up to Other Protein Sources
Six grams of protein per egg is modest compared to a chicken breast (around 31 grams per serving) or a can of tuna (about 20 grams). But few people eat just one egg. A three-egg breakfast delivers 18 grams of protein for roughly 220 calories, which is competitive with most other whole-food protein sources.
Eggs also have an advantage in versatility and speed. They cook in minutes, cost less per gram of protein than most meats, and require no seasoning or preparation to be palatable. For people trying to hit a daily protein target of 100 grams or more, eggs are a reliable building block rather than the whole foundation. Two or three eggs at breakfast, combined with protein from other meals, adds up quickly over the course of a day.
Quick Math for Meal Planning
If you’re counting protein, here are some common egg-based meals and their approximate protein totals:
- Two-egg omelet with cheese: 18 to 20 g of protein
- Three scrambled eggs: 18 g of protein
- Two hard-boiled eggs (snack): 12 g of protein
- Four egg whites: 14 g of protein
Hard-boiled eggs are especially practical for meal prep since they keep in the refrigerator for up to a week and the protein content doesn’t change after cooking.