Is that even a diet? Just sit back and see the question that you're asking. You are looking to go for a Kcal diet? Kcal stands for kilo calories and if you consume that many calories a day, you can't call it a diet. You will probably be in the running for the most obese person on earth. A diet is a meal that provides the body with minimal calories, calories that the body can't do without. Anything more than that gets stored in body. Try opting for an 1800 calorie diet, and follow aerobics or other exercises. Don't even think about an 1800 Kcal diet!