How many calories are in an egg white?
One large egg white is about 17 kcal. It carries roughly 3.6 g of protein and almost no fat, which gives it one of the best protein-per-calorie ratios in ordinary food.
Per portion
| Portion | Calories | Protein | Carbs | Fat |
|---|---|---|---|---|
| 1 large egg white, ~33 g | ~17 kcal | 3.6 g | 0.2 g | 0.1 g |
| 2 large egg whites | ~35 kcal | 7 g | 0.4 g | 0.1 g |
| 4 large egg whites | ~70 kcal | 14 g | 0.7 g | 0.2 g |
| 100 g (3.5 oz), about three whites | ~52 kcal | 11 g | 0.7 g | 0.2 g |
| 250 ml (8 fl oz) carton liquid white | ~125 kcal | 26 g | 1.7 g | 0.4 g |
A carton is the easier way to buy them in quantity: 250 ml is roughly seven or eight whites, and the figures are near-identical to separating your own. Some cartons add salt, which changes the taste and not the calories.
What changes the number
Very little, within the white itself. There is no fat to vary, so a white is about as stable a food as you will find. Medium whites are nearer 15 kcal and very large ones nearer 20, and that is the whole range.
The pan, as always. Whites stick ferociously, which is the quiet problem with cooking them alone — people reach for oil. A teaspoon is about 40 kcal, which more than doubles a two-white scramble. A non-stick pan or a brief spray keeps the ratio intact.
Sugar, in the other direction. A whisked white becomes meringue, and a meringue is mostly sugar: one shop-bought nest is around 50–60 kcal, almost none of it from the egg. Pavlova and macarons work the same way. The white is the structure, not the calories.
Where it fits in a deficit
Roughly 21 g of protein per 100 kcal puts egg whites at the top end of common foods — slightly ahead of chicken breast, about level with white fish, and more than twice the ratio of a whole egg. If the budget is tight and you are still short of a protein target, they add 15–20 g without much else attached.
The practical limit is appetite. Whites alone are bland and watery and do not hold people for long, so they tend to work as an addition — whisked into a scramble, stirred into oats, bulking out an omelette — rather than as the meal itself. A deficit you cannot stay in is not a cheaper one, and if the figures are that tight it is usually worth rechecking the target rather than squeezing the food.
What you give up with the yolk
The “whites only” habit has a real cost, and it is not calories. Nearly everything in an egg other than protein lives in the yolk: essentially all the vitamin A, D, E and K, most of the B12, folate and iron, the lutein, and almost all the choline. Discard three yolks and you have saved about 165 kcal and thrown away most of what made the egg worth eating.
The saving is also smaller than it feels. A three-white scramble is about 50 kcal against about 215 for three whole eggs. On a 1,800 kcal day that 165 is real but not decisive, and it is rarely the reason a calorie deficit stalls.
The middle option is usually the better one: one whole egg plus two or three whites. You keep the yolk nutrition and the flavour, land somewhere near 110–130 kcal, and still get most of the protein. If the yolks are going in the bin it should be a deliberate choice rather than a default — and whole boiled eggs remain the simpler answer most days.
Figures are typical values and vary by variety, size and preparation. General information, not medical advice.