The number of eggs that make up 500 calories depends on the size and preparation of the eggs. On average, a large egg contains approximately 71.5 calories (9). Therefore, you would need approximately 7 large eggs to reach 500 calories (as 7 eggs x 71.5 calories each = 500.5 calories). If you include cooking methods such as frying in oil or adding ingredients such as cheese, the calorie count will increase.