The weight of a 19-29 years old boy should be 83.4 kg, while the weight of a girl should be up to 73.4 kg. Weight of a boy between 30-39 years should be up to 90.3 kg, while the weight of a girl should be up to 76.7 kg. Weight of a 40-49 years old boy should be 90.9 kg, while a girl should weigh 76.2 kg.