Calculate body mass index from height and weight. This dedicated page is built for fast, clean calculations and search visibility.
Enter your values, click calculate, and see the result instantly. The page uses a simple, focused layout to improve usability on mobile and desktop.
How to use this calculator
- Open the bmi calculator page.
- Enter the required values in the form fields.
- Click Calculate to see the result and breakdown.
- Use the related links to explore similar tools.
Understanding your BMI result
Body Mass Index (BMI) is calculated as weight (kg) divided by height (m) squared. The WHO classifies results as: Underweight below 18.5, Normal weight 18.5–24.9, Overweight 25–29.9, and Obese 30 and above. For Asian populations including Indians, health risks begin at lower thresholds — overweight is often defined as BMI ≥23 and obese as ≥27.5.
BMI is a screening tool, not a diagnostic. A muscular athlete and a sedentary person can have identical BMIs with very different health profiles. BMI does not distinguish between fat and muscle mass.
What BMI doesn't tell you
- Fat distribution: Abdominal fat (waist circumference above 90cm for men, 80cm for women in South Asia) is a stronger predictor of metabolic risk than BMI alone.
- Muscle mass: Strength trainers often register as "overweight" despite having very low body fat. Use body fat percentage alongside BMI for a clearer picture.
- Age and gender: Body composition changes with age. Women naturally carry more fat than men at the same BMI, and this is physiologically normal.
A BMI in the normal range is a positive indicator, but the more actionable metrics are waist-to-height ratio (aim for below 0.5) and resting heart rate. Use this calculator to track directional change over months — a falling BMI alongside improving energy and fitness markers is the meaningful signal.