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V47.1 health quality reviewed
BMI Calculator
Estimate body mass index from height and weight, then compare the result with standard adult BMI categories. BMI is a screening number, not a full health diagnosis.
Calculate BMI
Enter height and weight.
BMI formula
BMI = weight kg ÷ height m²
Example: 75 kg and 1.80 m gives 75 ÷ 1.80² = 23.1.
Health note: BMI can be misleading for children, pregnancy, older adults, athletes, or people with unusually high or low muscle mass.
BMI categories for adults
- Below 18.5: underweight range
- 18.5 to 24.9: healthy weight range
- 25.0 to 29.9: overweight range
- 30.0 and above: obesity range
FAQ
Is BMI medical advice?
No. BMI is a simple screening calculation. Speak with a qualified health professional before making health decisions.