Hard-boiled egg: calories and nutrition facts
Calories in hard-boiled egg per 100 g and per typical portion, from the MacroLab food catalog.
155kcal per 100 g
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To burn these 155 calories:
- 36minWalking (5 km/h)
- 15minRunning (8 km/h)
- 19minCycling (16–19 km/h)
- 21minSwimming
Times use the MET equation for a 70 kg adult. Actual burn varies with your weight, age and pace.
Calories per portion
Common portions from the MacroLab catalog, next to the 100 g reference.
| Portion | kcal |
|---|---|
| 100 g | 155 |
| 1 piece (50 g) | 78 |
Can hard-boiled egg make you gain weight?
At 155 kcal per 100 g, this is a food with medium energy density: about 65 g gives 100 kcal.
One piece (50 g) has only 78 kcal, which is easy to fit into most days.
No single food makes you gain weight. What matters is your total calories over days and weeks compared with what you burn.
Hard-boiled egg vs other foods in “Eggs and dairy”
It has 19% fewer calories than the average food in “Eggs and dairy” (191 kcal per 100 g).
| Per 100 g | This food | Group average |
|---|---|---|
| Energy | 155 kcal | 191 kcal |
Related foods
Frequently asked questions
- How many calories are in 100 g of hard-boiled egg?
- 100 g has 155 kcal. That means about 65 g for every 100 kcal.
- How many calories are in one piece of hard-boiled egg?
- One piece (50 g) has 78 kcal.
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Data from the MacroLab food catalog, updated September 26, 2026. Values vary by variety and brand; check the label of the product you buy.