330 joules.

1. A boiled egg contains 334.88 kilojoules. The calorie of a boiled egg is 80 kilojoules. 1 kcal = 4.186 kilojoules. Therefore, the calorie of an egg is: 80x4.186=334.88 kilojoules. Jiao. Fried eggs add more calories than boiled or poached eggs.

2. An egg of about 60 grams can produce about 90 kcal of heat. However, the amount of heat generated by eating eggs is also affected by the cooking method.

3. Boiled eggs are the egg cooking method with the least nutritional loss. Eggs are a high-quality source of protein and can be eaten in moderation during weight loss.