The amount of body fat in children is relative and depends on a number of factors, including age, gender, and genetics. Generally speaking, however, most children have between 5-20% body fat.   Overweight and obese children often have more than 20% body fat. This excess weight can put them at risk for a number of health problems, including type 2 diabetes, high blood pressure, heart disease, and stroke.   There are a number of ways to help reduce your child's body fat and promote healthy weight loss. These include making sure they eat a balanced diet and get regular exercise. You can also talk to your child's doctor about other ways to help manage their weight.