BMI Calculator
BMI compares your weight with your height to show whether you sit in a healthy weight range. It is a quick screening number — a starting point, not a diagnosis.
Your numbers
Result
- Healthy minimum weightkg
- 53.46
- Healthy maximum weightkg
- 71.96
How BMI is calculated
The formula is BMI = weight ÷ height², with weight in kilograms and height in meters. For example, 70 kg at 1.70 m gives 70 / (1.70 × 1.70) ≈ 24.2. Prefer pounds and inches? Use the unit toggle — the math is identical, only the display changes.
WHO classification ranges
Underweight: below 18.5. Normal weight: 18.5 to 24.9. Overweight: 25 to 29.9. Obesity class I: 30 to 34.9. Class II: 35 to 39.9. Class III: 40 or above. These cut-offs apply to adults.
What BMI does not tell you
BMI does not separate muscle from fat, and it ignores where fat sits on your body, your age and your sex. A muscular athlete can score "overweight" while carrying very little fat, and someone with a normal BMI can still carry excess abdominal fat. Treat it as a first reference and speak to a health professional for a full assessment.
Informational and educational result. Not a substitute for professional advice.
Frequently asked questions
Sources
- World Health Organization (WHO) — Obesity and overweight
- WHO — Body mass index (BMI) classification for adults
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