BMI for 45 kg at 165 cm tall
A person weighing 45 kg at 165 cm has a BMI of 16.5, classed as underweight. Healthy weight range for this height: 50.4–67.8 kg.
BMI 16.5 — Underweight
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Full breakdown
| BMI | 16.5 |
| Category (WHO) | Underweight |
| Healthy weight at 165 cm | 50.4 – 67.8 kg |
| Weight in pounds | 99.2 lb |
| Height in feet/inches | 5 ft 5.0 in |
Step-by-step working
- Convert height to metres: 165 cm ÷ 100 = 1.65 m
- Square the height: 1.65² = 2.7225 m²
- Divide weight by height²: 45 ÷ 2.7225 = 16.5
BMI = weight (kg) ÷ height (m)²
Try your own numbers with the BMI Calculator.