How much protein is in a hard-boiled egg?

A hard-boiled egg has 12.6 g of protein per 100 g and 6.3 g per 1 large (50 g). That is 8.1 g of protein per 100 kcal — a solid protein-per-calorie ratio for a whole food.

Should eggs be weighed raw or cooked?

Weigh it in whichever state you log it, and use the row that matches — this page is the cooked row. Cooking does not change how many calories are there, only how many grams they are spread across: meat loses water in the pan and gets denser, grains and pasta absorb it and get lighter per gram.

All foods

EggsUSDA SR LegacyFDC 173424

Calories in a hard-boiled egg

USDA FoodData Central record for “Egg, whole, cooked, hard-boiled” — per 100 g, per every USDA serving size, and next to the other eggs rows.

The short answer

A hard-boiled egg: 155 kcal per 100 g. 1 large (50 g) is 78 kcal with 6.3 g of protein. Source: USDA FoodData Central record 173424, "Egg, whole, cooked, hard-boiled".

Per 100 g

Nutrient	Per 100 g	Share of energy
Energy	155 kcal	100%
Protein	12.6 g	33%
Fat	10.6 g	62%
Carbohydrate	1.1 g	3%

A hard-boiled egg is 155 kcal per 100 g in USDA FoodData Central (SR Legacy). Of that energy, about 33% comes from protein, 62% from fat and 3% from carbohydrate. That works out to 8.1 g of protein per 100 kcal — a solid protein-per-calorie ratio for a whole food.

Per serving

The serving sizes USDA lists for this record, priced from the per-100 g figures above. Nothing here is rounded to a “portion” — the gram weight next to each label is what the calories are computed from.

Serving	Weight	Calories	Protein	Fat	Carbs
100 g	100 g	155	12.6 g	10.6 g	1.1 g
1 cup, chopped	136 g	211	17.1 g	14.4 g	1.5 g
1 tbsp	8.5 g	13	1.1 g	0.9 g	0.1 g
1 large	50 g	78	6.3 g	5.3 g	0.6 g

Compared with other eggs

Food	kcal / 100 g	Protein / 100 g	Per serving
A raw egg	143	12.6 g	72 kcal · 1 large
A hard-boiled egg	155	12.6 g	78 kcal · 1 large
A fried egg	196	13.6 g	90 kcal · 1 large
Scrambled eggs	149	10 g	91 kcal · 1 large
A poached egg	143	12.5 g	72 kcal · 1 large
An omelet (plain)	154	10.6 g	94 kcal · 1 large
Egg white	52	10.9 g	17 kcal · 1 large
Egg yolk	322	15.9 g	55 kcal · 1 large

The eggs rows exist in more than one state because water moves during cooking: this is the cooked row. Weigh the food in the state you log and pick the row that matches — the calories don’t change in the pan, the grams do. The mechanics are in cooked vs raw weights.

Worth knowing

Hard-boiled sits a hair above raw per 100 g because the egg loses a little water through the shell during cooking — the energy is identical, it is just packed into slightly fewer grams.

Other tables in dairy and egg products

The same numbers for the foods this one usually shares a plate — or a shopping list — with.

Questions about a hard-boiled egg

How many calories are in a hard-boiled egg?: A hard-boiled egg: 155 kcal per 100 g. 1 large (50 g) is 78 kcal with 6.3 g of protein. Source: USDA FoodData Central record 173424, "Egg, whole, cooked, hard-boiled".
How much protein is in a hard-boiled egg?: A hard-boiled egg has 12.6 g of protein per 100 g and 6.3 g per 1 large (50 g). That is 8.1 g of protein per 100 kcal — a solid protein-per-calorie ratio for a whole food.
Should eggs be weighed raw or cooked?: Weigh it in whichever state you log it, and use the row that matches — this page is the cooked row. Cooking does not change how many calories are there, only how many grams they are spread across: meat loses water in the pan and gets denser, grains and pasta absorb it and get lighter per gram.

How calorie.one logs it

Type “hard-boiled egg” into calorie.one and the app matches this exact record — “Egg, whole, cooked, hard-boiled” — estimates the grams, and shows the line with its USDA label. You correct the amount; the per-100 g figure is never guessed. That split between recognition and arithmetic is the whole methodology. For the numbers in context, read How many calories are in an egg?.