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Explainer· Macros

How much protein in an egg, by size

Evidence reviewed·07 sources cited·Dr. Soraya Khan, RDN
Vol. 1Issue 042026-06-24larderlab.com
Educational use only. Larderlab content is educational. Pantry, macro, and supplement guidance is not a substitute for medical advice. Consult a registered dietitian or your physician before making material changes to your diet or supplementation.

A large egg has 6.3 g of protein (USDA): 3.6 g in the white, 2.7 g in the yolk. Protein by egg size, the cost-per-gram math, and how it ranks against other sources.

Questions

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Q01
How much protein is in one large egg?
6.3 g, per USDA FoodData Central (SR Legacy: 6.28 g of protein in a 50 g large egg). That egg is also 72 kcal with 4.8 g fat. The protein splits 3.6 g in the white and 2.7 g in the yolk. For quick math, use 6 g per large egg.
Q02
How much protein is in two eggs?
About 12.5 g for two large eggs (2 x 6.28 g). At ~144 kcal combined, that is a protein density of ~0.087 g/kcal, solid but not exceptional. Two eggs supply ~1.3 g leucine, below the ~2.5-3 g per-meal threshold Moore 2015 links to maximal muscle protein synthesis, so pair them with another source if the meal is meant to be anabolic.
Q03
How much protein in 3 eggs vs a chicken breast?
Three large eggs give ~18.8 g protein for ~216 kcal. A typical 150 g cooked chicken breast gives ~46 g protein for ~250 kcal (USDA: 30.5 g protein per 100 g cooked breast). The breast wins decisively on protein density, ~0.18 vs ~0.087 g/kcal. Eggs win on micronutrients (choline, B12) and cost per egg, not on grams of protein per calorie.
Q04
Is the protein in the white or the yolk?
Both, but more in the white. A large egg's white holds 3.6 g (~57%) and the yolk 2.7 g (~43%). Eating whites only keeps ~57% of the protein for ~24% of the calories, the rationale for white-only when cutting. The trade-off is the yolk's ~147 mg choline, lutein, vitamin D, and B12, which the white lacks.
Q05
Does cooking change the protein content?
Cooking does not destroy protein; the gram count is essentially unchanged from raw to scrambled, boiled, or fried. What cooking changes is digestibility: Evenepoel 1998 found cooked egg protein is ~91% absorbed versus ~51% for raw, because heat denatures the proteins and inactivates avidin and trypsin inhibitors. Eat eggs cooked to actually use the protein.
Q06
How many eggs to hit a 30 g protein meal?
About 5 large eggs (5 x 6.28 = 31.4 g), at ~360 kcal and ~930 mg cholesterol. That is a lot of calories and cholesterol for 30 g. The cost-effective move is 2-3 eggs (12.5-18.8 g) plus a lean add-on: Greek yogurt, cottage cheese, or a scoop of whey to clear the threshold without the calorie load.
Q07
How much does egg protein cost per gram?
At a warehouse 18-count around $4.50 ($0.25/egg), one large egg's 6.3 g protein costs ~$0.040/g. Bulk 60-count or sale eggs drop that to ~$0.020/g; pasture-raised cartons run ~$0.090/g. Eggs sit mid-pack: above whey concentrate (~$0.013/g) and bulk chicken (~$0.015/g), below most retail meat. See the full ranking in our 12 high-protein foods by $/g.
Sources

Every claim, cited.

07 refs
  1. [01]USDA FoodData Central. Egg, whole, raw, fresh (SR Legacy 748967): 12.56 g protein per 100 g; 6.28 g per 50 g large egg.
  2. [02]USDA FoodData Central. Egg, white, raw, fresh (SR Legacy): ~10.9 g protein per 100 g, ~3.6 g per large-egg white.
  3. [03]USDA FoodData Central. Egg, yolk, raw, fresh (SR Legacy): ~15.9 g protein per 100 g, ~2.7 g per large-egg yolk.
  4. [04]Evenepoel P, Geypens B, Luypaerts A, et al. 1998. Digestibility of cooked and raw egg protein in humans as assessed by stable isotope techniques. J Nutr 128(10):1716-1722. Cooked egg protein ~91% absorbed vs ~51% raw.
  5. [05]Moore DR et al. 2015. Per-meal leucine threshold (~0.4 g/kg, ~2.5-3 g leucine) for maximal myofibrillar protein synthesis. J Gerontol A Biol Sci Med Sci 70(1):57-62.
  6. [06]FAO. 2013. Dietary protein quality evaluation in human nutrition: DIAAS and PDCAAS. Whole egg PDCAAS 1.0; cooked whole-egg DIAAS ~113.
  7. [07]USDA FoodData Central. Chicken, broilers or fryers, breast, meat only, cooked, roasted: 30.5 g protein per 100 g (for the egg-vs-breast comparison).
The Larderlab Team · byline

The Larderlab Team builds evidence-led frameworks for eating, lifting, and stocking a kitchen. We cite every claim. We publish the spreadsheet when possible. We buy what we review at retail price. When new data lands, we revise with a dated note.

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