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⚖️ BMI Calculator
Body Mass Index from height and weight
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About the BMI Calculator
Our BMI calculator estimates Body Mass Index from your height and weight in metric or imperial units. It returns your BMI score plus the standard WHO category: underweight, healthy, overweight or obese.
BMI is a quick population-level screen, not a diagnosis. It does not account for muscle mass, bone density, age or ethnicity, so treat the number as a starting point rather than a verdict.
How it works
- Choose metric (cm, kg) or imperial (ft/in, lb).
- Enter your height and weight.
- Read your BMI score and the category it falls into.
What you'll learn
- How BMI is calculated from height and weight.
- Where the standard healthy, overweight and obese cutoffs sit.
- Why BMI alone does not capture body composition.
FAQs
- Is BMI accurate for athletes?
- Often not. Muscle is denser than fat, so muscular athletes can score as overweight even at low body fat.
- What is a healthy BMI range?
- The standard adult healthy range is 18.5 to 24.9, but optimal varies by individual.
- Does BMI work for children?
- Children use age and sex-specific percentile charts rather than the adult formula.
Disclaimer: Not medical advice. Talk to a qualified clinician about your individual health.