Pupils are 146cm tall and weigh 58 kg. Is it normal?

Male: (height cm-80) × 70 = standard weight.

Female: (height cm-70) × 60% = standard weight.

Standard weight plus or minus 10% is normal weight.

Standard weight plus or minus 10 ~ 20% overweight or underweight.

Obesity or underweight is defined as plus or minus 20% of standard weight.

If the boy is 146cm, then the standard weight is (146-80) x 0.7 = 46.2 kg = 92.4 kg.

If the girl is 146cm, then the standard weight is (146-70) x 0.6 = 45.6 kg = 91.2 kg.

So 88 kg is ok.