Height cm  Weight kg  

Height 190 weight 67
What is the ideal weight for 190 cm tall male or female? Is it normal to weigh 67 kg for this height? Body Mass Index (BMI) will answer these questions. If BMI value is within the range 18.5 – 24.99 (for any height), then the weight is withing normal limits.
For the height 1.9 meters (190 cm) and for the weight 67 kilograms:  

Result:  ✔ The weight is within normal limits. 
BMI:  ✔ 18.56 
Normal weight limits:  67  90 kg. 
What to do?  Maintain current weight. You can lose 0 kg and gain 23 kg staying within BMI ranges. 
How to calculate BMI and weight ranges on your own?
 BMI formula: weight / height^{2}
 where the height value is in meters (not in centimeters), for example 1.62 (not 162).
 Multiplication first, then division!  For example, if the height is 169 cm and the weight is 116 kg, then BMI = 116 / 1.69 * 1.69 = 40.61. BMI above normal values.
Check yourself. The Height and weight combinations below are normal or not?