A healthy body weight of which is indicated with the power to maintain a healthy weight. Ideal body weight is the weight of the body that matches the height according to a specific formula and then finally in accordance with the standards that have been defined. In adults, known as the body mass index formula, which is the body weight (BW) divided by height (mtr.) Squared. Medium in infants and toddlers can be measured by weigh, and then recorded in the Towards Health Card (KMS). Healthy children, the added age, so the added weight. Year old child to the top, every year is going to be added BB 2, 5 kg until they were 18 years old .. Parents should be prejudiced if the two bln. BB consecutively son not be added, said Dr. Idrus Juice’at, dean of the Faculty of Health Sciences, Campus Esa Unggul, Jakarta. In adults, body mass index (BMI), which normally is 18, 524, 25 IMT 9. The body weight was listed advantages as well as 27 upwards, including overweight and obesity. Although widely used in a way, but it could not be finished IMT measurement tool for children’s body weight as well as some bodybuilders who have a lot of muscle. You need to be aware when BMI values ??reach 27. Some obese people more vulnerable to various diseases. According to the Centers for Disease Control and Prevention, there are many diseases associated with a high BMI values, such as coronary heart disease, type 2 diabetes, cancer, high blood insistence, dyslipidemia (high cholesterol), stroke, sleep problems, osteoarthritis, etc.