⚖️ BMI Calculator (Body Mass Index)
Calculate Body Mass Index (BMI) from weight and height and see the WHO weight-status category. Free, instant, and computed in your browser — no data leaves your device.
BMI Calculator (Body Mass Index)
Weight (kg)
Height (cm)
When to use
Quick screening of weight status in adults. Not a diagnosis and does not separate fat from muscle.
How it works
BMI = weight(kg) / height(m)². Categories: < 18.5 underweight, 18.5–24.9 normal, 25–29.9 overweight, ≥ 30 obese.
Key points
- Screening tool only — interpret with waist circumference and clinical context.
- Asian-population thresholds for overweight/obesity are lower (≥ 23 / ≥ 27.5).
- Muscular individuals may be misclassified as overweight.
References
Decision support for licensed clinicians only; not a substitute for clinical judgement, diagnosis or local protocols.