Understanding BMI for Adults
Learn what your BMI number means, what category you fall into, and what the WHO guidelines say.
Healthy weight range for your height: 56.7 – 76.3 kg
BMI is a screening tool, not a diagnostic measure. It does not account for muscle mass, bone density, or fat distribution. Consult a healthcare professional for personalised advice.
Education tips
Note: this calculator uses adult BMI categories. Children and teenagers require age- and sex-specific BMI percentile charts (BMI-for-age) — consult a paediatrician.
BMI = weight (kg) ÷ height² (m²). A 70 kg person who is 1.75 m tall: 70 ÷ (1.75 × 1.75) = 70 ÷ 3.0625 = 22.9 (Normal).
The WHO defines four categories: Underweight (<18.5), Normal (18.5–24.9), Overweight (25–29.9), Obese (30+). These are international standards.
Some health organisations use lower BMI thresholds for Asian populations, where health risks from excess weight appear at lower BMI values.
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