The number of calories for an egg varies on size and the parts ingested.
Egg whites constitute about 22% of the total calories and the yolk 78%,
An unshelled egg contains approximately 37.5 kcal per ounce.
Egg Size
|
Weight per Egg
|
Calories
|
medium
|
1.75 ounce
|
66 kcal
|
large
|
2.0 ounce
|
75 kcal
|
extra large
|
2.25 ounce
|
84 kcal
|
jumbo
|
2.50 ounce
|
94 kcal
|
For a unshelled hard-boiled egg there are approximately 155 kcal per 3.5 ounces (100 grams).