BMI for 178 cm and 47 kg
BMI 14.8
Asia-Pacific cut-offs (23 · 25) · underweight
WHO international cut-offs (25 · 30) · underweight
Reference weight and healthy range
At BMI 22 the reference weight is 69.7 kg.
The healthy range (BMI 18.5–22.9) is 58.6–72.6 kg.
That is 11.6 kg below the bottom of the range.
Other pairs that also give BMI 14.8
Nearby heights and weights
BMI cannot tell muscle from fat, so it reads high for people who train heavily. It is a reference figure, not a diagnosis.