Egg calories: nutrition, weighed portions and preparation

How many calories does egg contain?

For the numbers in this guide, egg means “Egg, whole, raw, fresh” (USDA FoodData Central 171287). It contains 143 kcal per 100 g edible portion. The selected reference is a raw whole egg. It is a calculation reference, not advice to eat raw eggs or a value for a fried egg with cooking fat. Keeping that definition attached to the number prevents a plain ingredient from being mistaken for a prepared meal.

A weighed 50 g portion provides approximately 71.5 kcal: 50 × 143 ÷ 100. A smaller 25 g portion gives 35.8 kcal, while 75 g gives 107.3 kcal. These are calculated amounts of the named food, not claims about the weight of a standard piece, cup or restaurant serving.

What comes with those calories?

The same 100 g reference provides 12.6 g protein, 0.7 g total carbohydrate, 9.5 g fat and 0 g fiber. For the illustrated 50 g portion, those amounts become 6.3 g protein, 0.4 g carbohydrate, 4.8 g fat and 0 g fiber. Calories and individual nutrients describe different parts of the food, so keep all of them on the same portion basis when reading the table.

An egg shell is excluded from the edible reference. Egg size categories and a weighed amount are different ways of describing a portion, and the gram calculation is the clearer option when comparing recipes.

Weighing egg without guessing a serving

Use edible egg weight without the shell. When cooking several eggs, record how many edible portions the recipe actually contains. A useful kitchen sequence is to place an empty bowl on the scale, tare it to zero, add the edible egg, and note the grams before combining it with other foods. If you serve only part of that amount, record the part eaten. Leftovers matter because the amount available and the amount consumed are different quantities.

For an omelet, count the edible egg used and include milk, cheese, vegetables and cooking fat. Dividing the omelet after cooking divides the ingredients, even if the finished weight changes through cooking.

What changes in a complete dish?

The raw whole-egg record is a nutrition reference rather than a recommendation to eat uncooked egg. A prepared fried-egg entry should be checked for whether added cooking fat is already included.

Scrambled eggs may include milk, cheese or butter. Use a suitable cooked entry or calculate those additions separately.

For an explicit ingredient example, 50 g of the named egg plus 5 g olive oil gives approximately 115.7 kcal. The egg contributes 71.5 kcal and the oil contributes 44.2 kcal. This is an illustrative two-ingredient calculation, not a tested recipe or a claim that egg is always served with oil.

How egg compares with tofu

The comparison food is “Tofu, raw, firm, prepared with calcium sulfate” (FDC 172475), which contains 144 kcal per 100 g. At equal 50 g weights, the egg reference supplies 71.5 kcal and tofu supplies 72 kcal: a difference of 0.5 kcal. That is a calculation for these records, not a universal ranking of foods or an instruction to exchange equal portions.

Compare the nutrients as well as the energy in the named records below. A food with a different water content, texture or role in the meal may not be a direct substitute. For a real swap, compare the amounts you plan to eat and include the rest of the plate, rather than choosing solely from the lower number in a 100 g table.

Recording the meal in BiteCal

In BiteCal, start with a photo of the egg portion and the rest of the meal. Review the proposed food name, preparation, amount and visible additions before saving the calorie and macro estimate. If you already know the gram weight, use it as a check rather than accepting a visually plausible portion. A photo cannot establish a hidden oil quantity or replace the identity of a packaged product.

The nutrient figures come from USDA SR Legacy, final release April 2018. They provide a reproducible reference for the named food rather than a laboratory result for your own serving. Use the current package or restaurant information when it describes your exact product more closely. Rounding explains small differences between displayed portions; calculations here use the retained unrounded reference values.

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