A girl with a height of 175cm weighs between 56.7 and 73.5kg. Generally, you can calculate the body mass index to determine the body fat and thin situation, the normal range of 18.5 ~ 24.0, this value is less than 18.5 is underweight, between 24.0 ~ 27.9 is overweight, more than 28.0 is obese. Therefore, a girl with a height of 175cm weighing between 56.7 and 73.5kg is considered normal. If there is no causative factor, found that their own weight in a short period of time significantly increased or decreased, should be alert to whether it is caused by disease, need to go to the regular hospital as soon as possible to avoid delaying the condition. Normally, you should have a balanced diet to avoid malnutrition or obesity.