Calories in egg (hard-boiled)
Calories, protein, carbohydrate and fat per 100 g and per serving, from the USDA reference database — plus what actually changes the number on your plate.
Short answer
100 g of egg (hard-boiled) contains 155 kcal, with 12.6 g of protein, 1.1 g of carbohydrate and 10.6 g of fat.
A typical serving — 1 large egg, about 50 g — is roughly 78 kcal.
That is a moderate calorie density, in the same range as cooked grains and lean meat.
Nutrition facts
| Nutrient | Per 100 g | 1 large egg (50 g) |
|---|---|---|
| Calories | 155 kcal | 78 kcal |
| Protein | 12.6 g | 6.3 g |
| Carbohydrates | 1.1 g | 0.6 g |
| Sugars | 1.1 g | 0.6 g |
| Fibre | 0 g | 0 g |
| Fat | 10.6 g | 5.3 g |
| Saturated fat | 3.3 g | 1.6 g |
| Cholesterol | 373 mg | 187 mg |
| Sodium | 124 mg | 62 mg |
| Potassium | 126 mg | 63 mg |
| Calcium | 50 mg | 25 mg |
| Iron | 1.2 mg | 0.6 mg |
| Vitamin C | 0 mg | 0 mg |
| Water | 75 g | 37 g |
Calories per serving
| Serving | Weight | Calories | Protein | Carbohydrates | Fat |
|---|---|---|---|---|---|
| 1 large egg | 50 g | 78 | 6.3 g | 0.6 g | 5.3 g |
Photograph it instead of looking it up
Wellix identifies egg on your plate, estimates the portion and logs calories, protein, carbs and fat in seconds. Free to start on iPhone and Android.
Calories by weight
Use this table when you know the weight but not the serving:
| Amount | Calories | Protein | Carbohydrates | Fat |
|---|---|---|---|---|
| 25 g | 39 | 3.1 g | 0.3 g | 2.7 g |
| 50 g | 78 | 6.3 g | 0.6 g | 5.3 g |
| 100 g | 155 | 12.6 g | 1.1 g | 10.6 g |
| 150 g | 233 | 18.9 g | 1.7 g | 15.9 g |
| 200 g | 310 | 25.2 g | 2.2 g | 21.2 g |
| 250 g | 388 | 31.5 g | 2.8 g | 26.5 g |
| 300 g | 465 | 37.7 g | 3.4 g | 31.8 g |
Where the calories come from
Calories come from three macronutrients: protein and carbohydrate at 4 kcal per gram, fat at 9 kcal per gram. For egg (hard-boiled) the split is:
- Protein: 12.6 g × 4 = 50 kcal — 33% of calories
- Carbohydrates: 1.1 g × 4 = 4 kcal — 3% of calories
- Fat: 10.6 g × 9 = 95 kcal — 64% of calories
- Most of the energy in egg (hard-boiled) comes from fat (64% of calories).
- With 12.6 g of protein per 100 g it counts as a high-protein food.
- That is 8.1 g of protein per 100 kcal — a useful number when protein is your target.
- For 200 kcal you can eat about 130 g.
Compare preparations
The same food, prepared differently. Cooking removes water (so calories per 100 g rise), adds fat (so they rise further), or both.
| Preparation | Calories | Protein | Carbohydrates | Fat |
|---|---|---|---|---|
| Egg (hard-boiled)this page | 155 | 12.6 g | 1.1 g | 10.6 g |
| Egg (fried) | 196 | 13.6 g | 0.8 g | 14.8 g |
| Egg (scrambled) | 149 | 10 g | 1.6 g | 11 g |
| Egg (raw) | 143 | 12.6 g | 0.7 g | 9.5 g |
| Egg white (raw) | 52 | 10.9 g | 0.7 g | 0.2 g |
| Egg yolk (raw) | 322 | 15.9 g | 3.6 g | 26.5 g |
| Omelette (plain omelette) | 154 | 10.6 g | 0.6 g | 11.7 g |
What actually changes the number
A large boiled egg is 78 kcal and 6 g of protein, with the calories split almost entirely between the yolk's fat and protein. Eggs vary by size more than by cooking method: a medium egg is about 65 kcal, an extra-large about 90.
How accurate are these numbers?
The values on this page are reference averages from the USDA FoodData Central database (SR Legacy release), measured on samples of egg as sold and prepared in the United States. Your portion will differ: produce varies by variety and ripeness, meat by cut and trim, and anything cooked by the fat and water it gained or lost.
For most foods the per-100 g figure is reliable to within about 10%. The larger uncertainty is almost always the weight of what is on your plate and the cooking fat you cannot see — the two things worth checking before you worry about the database.
How accurate are AI calorie counting apps? →
Related foods
Frequently asked questions
How many calories are in 100 g of egg?
100 g of egg (hard-boiled) contains 155 kcal (12.6 g protein, 1.1 g carbohydrate, 10.6 g fat), according to USDA reference data.
How many calories are in a serving of egg?
A typical serving of egg — 1 large egg, about 50 g — has roughly 78 kcal. Weigh your own portion once to see how it compares; serving sizes vary more than the food does.
How much protein is in egg?
Egg (hard-boiled): 12.6 g of protein per 100 g, which is high. Foods above about 15–20 g per 100 g, or where protein supplies a third or more of the calories, are usually considered high-protein.
What amount of egg equals 200 kcal?
At 155 kcal per 100 g, about 130 g of egg equals 200 kcal.
Can I track egg by taking a photo?
Yes. A photo calorie app like Wellix identifies egg on the plate and estimates the portion from the image. The estimate is most accurate when you confirm the weight or the count, and tell the app about anything the camera cannot see — cooking oil, butter, dressings and sauces.
Source
Nutrition data: U.S. Department of Agriculture, FoodData Central — SR Legacy, FDC ID 173424: "Egg, whole, cooked, hard-boiled". Values are per 100 g of edible portion. Serving weights are USDA household measures or typical retail sizes; check the label where one exists. View the USDA record.
Wellix provides general nutrition information and is not medical advice. Nutrition values are reference averages and individual foods vary. Consult a qualified healthcare professional before making significant dietary changes.
Photograph it instead of looking it up
Wellix identifies egg on your plate, estimates the portion and logs calories, protein, carbs and fat in seconds. Free to start on iPhone and Android.
