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Boiled Egg (One Yolk) Calories
High-quality protein, rich in vitamin B12 and choline
In season: Spring · Summer · Autumn · Winter
CALORIES · 100 G
GI
POTASSIUM · 100 G
FIBER · 100 G
Quick answer
1 piece (medium) of Boiled Egg (One Yolk) (50 g) has 72 calories. That works out to 143 calories per 100 g. It contains 0.6 g of carbs, 6.5 g of protein, 4.9 g of fat and 0 g of fiber. Its 10 µg of Biotin covers 33% of the Daily Value. Its glycemic index is 0 (low), so it raises blood sugar slowly.
Boiled Egg (One Yolk) Nutrition Facts
Selected: 1 piece (medium) · 50 g
72
KCAL / 50G
Carbs
0.6g
· 0% DV
Protein
6.5g
· 13% DV
Fat
4.9g
· 6% DV
Fiber
0g
· 0% DV
DV is the share of the daily value covered, on a 2,000 kcal reference diet.
Calories come from: Carbs 3% · Protein 36% · Fat 61%
Boiled Egg (One Yolk) nutrition facts table · 1 piece (medium) (50 g)
| Nutrient | Amount | % DV |
|---|---|---|
| Calories | 72 kcal | |
| Total fat | 4.9 g | 6% |
| Saturated fat | 1.55 g | 8% |
| Trans fat | 0 g | |
| Sodium | 70 mg | 3% |
| Total carbohydrate | 0.6 g | 0% |
| Fiber | 0 g | 0% |
| Protein | 6.5 g | 13% |
Calories: Calories measure energy. Average daily need is 2,000 kcal. Excess calories are stored as fat, too few cause weight loss.
Carbs: Your body's primary energy source. The brain runs exclusively on carbs. Daily need: 275g.
Protein: Essential for muscle repair and cell growth. Daily need: 50g. Keeps you full and boosts metabolism.
Fat: Needed for hormone production and vitamin absorption. Daily need: 78g. Limit saturated fats, choose unsaturated.
Fiber: Critical for digestive health and satiety. Daily need: 28g. Stabilizes blood sugar, lowers cholesterol.
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How Many Calories in 1 Medium Boiled Egg (One Yolk)?
| Serving | Amount | Calories |
|---|---|---|
| 1 piece (medium) | 50 g | 72 kcal |
| 1 piece (extra small) | 35 g | 50 kcal |
| 1 piece (small) | 40 g | 57 kcal |
| 1 piece (large) | 60 g | 86 kcal |
| 1 piece (extra large) | 70 g | 100 kcal |
| 100 g | 100 g | 143 kcal |
| 2 piece (medium) | 100 g | 143 kcal |
| 1 serving (large) | 100 g | 143 kcal |
Calculated from 143 calories per 100 g.
Frequently Asked Questions About Boiled Egg (One Yolk)
How long should you boil a boiled egg for a firm yolk?
For a fully firm yolk, cook a boiled egg for about 9–12 minutes after the water reaches a boil. A shorter cooking time leaves the yolk softer, so adjust the timing to the texture you prefer.
How do you make a boiled egg easier to peel?
Cool a boiled egg in cold water as soon as it is cooked, then gently crack the shell and start peeling from the wider end. Cooling stops the cooking and can help separate the shell from the white.
How long does a boiled egg last in the fridge?
A boiled egg kept in its shell lasts about one week in the refrigerator. Refrigerate it within two hours of cooking; keep a peeled egg in a covered container and use it sooner.
Why does a boiled egg get a green ring around the yolk?
A green-gray ring around a boiled egg yolk forms when the egg is cooked for too long. It is a harmless reaction between sulfur in the white and iron in the yolk, and does not by itself mean the egg has spoiled.
Can you freeze a boiled egg?
You can freeze a boiled egg, but it is usually not worth doing because the white becomes tough and watery after thawing. For a better texture, refrigerate leftover eggs and eat them within their safe storage time.
Can you microwave a boiled egg?
Do not microwave a whole boiled egg, even after peeling it; trapped steam can make it burst. To warm one, cut it into pieces first and heat it briefly, checking that it is warm without overheating.
Can you leave a boiled egg out overnight?
No, discard a boiled egg left at room temperature overnight. Cooked eggs should be refrigerated within two hours, or within one hour if the surrounding temperature is above 90°F (32°C).
Why is a boiled egg hard to peel even when it is fully cooked?
A boiled egg can be hard to peel when it is very fresh, because its white tends to cling more tightly to the inner shell membrane. Using eggs that have been refrigerated for a while and cooling them promptly can help.
Can dogs eat a boiled egg?
Yes, most dogs can eat a plain, fully cooked boiled egg in small pieces as an occasional treat. Remove the shell and skip salt, butter, and seasonings; introduce it gradually to see how your dog tolerates it.
Can you eat the shell of a boiled egg?
A boiled egg shell is technically edible, but eating it whole is not recommended because sharp pieces can irritate or injure the mouth and throat. For calcium, choose foods with a safer texture rather than chewing the shell.
Boiled Egg (One Yolk) Vitamins & Minerals
Vitamins
Biotin
10µg · 33% DV
B12
0.55µg · 23% DV
B2
0.25mg · 19% DV
B5
0.7mg · 14% DV
Minerals
Selenium
15µg · 27% DV
Phosphorus
99mg · 14% DV
Iodine
12µg · 8% DV
Iron
0.9mg · 5% DV
Sodium
70mg · 3% DV
Potassium ⭐
69mg · 2% DV
Boiled Egg (One Yolk) Glycemic Index
GLYCEMIC INDEX
GLYCEMIC LOAD
Accounts for portion size — a more realistic measure than GI alone.
How to Burn Off Boiled Egg (One Yolk)
To burn the 72 calories in 1 piece (medium) (50 g):
🚶
Walking (5 km/h)
🏃
Running (8 km/h)
🚴
Cycling
🏊
Swimming
Times are calculated with the MET equation for a 70 kg adult. Actual burn varies with your weight, age and pace.
What is Boiled Egg (One Yolk)?
Boiled egg (one yolk) is an egg cooked in its shell until the white and yolk set. It is an everyday staple in many cuisines, served at breakfast or added to salads, sandwiches and packed lunches. The white turns firm and easy to slice, while the yolk can be soft and creamy or fully set and crumbly, depending on cooking time.
It offers high-quality protein and is naturally low in carbohydrates, with vitamin B12 and choline among its nutrients. Enjoy it with toast and vegetables for breakfast, or slice it over a salad for a simple lunch. Fresh herbs, pepper or a little mustard add flavour without needing a rich dressing.
How Nutritious Is Boiled Egg (One Yolk)?
Nutrient density
High
How many vitamins, minerals and how much fiber this food carries per calorie. A high score means a lot of nutrition for few calories.
Satiety score
Medium
An EatBetter score computed from fiber, protein and calorie density. A high score means staying full longer on the same calories.
Both scores are calculated per 100 g and do not change with the selected portion. The satiety score is EatBetter's own calculation, not a clinical measure.
Is Boiled Egg (One Yolk) Processed?
NOVA 2
Minimally Processed
1. Unprocessed
2. Minimally Processed
3. Processed
4. Ultra-Processed
NOVA classifies foods into 4 groups by industrial processing. NOVA 1 (unprocessed) is the healthiest.
Does Boiled Egg (One Yolk) Contain Allergens?
Contains these allergens:
Which Diets Is Boiled Egg (One Yolk) Good For?
Vegan
— Not suitable
Vegetarian
✓ Suitable
Gluten-Free
✓ Suitable
Dairy-Free
— Not suitable
Mediterranean
✓ Suitable
Paleo
✓ Suitable
Whole30
— Not suitable
DASH
— Not suitable
Keto
✓ Suitable
Low FODMAP
— Not suitable
Boiled Egg (One Yolk) Fat Profile
SATURATED
1.55g
MONOUNSATURATED
1.85g
POLYUNSATURATED
0.7g
Omega 6:3 ratio 16.3:1
Above the ideal 4:1 (16.3:1).
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Nutrition data compiled from USDA FoodData Central and scientific sources.