Calculator BMI Calculator
Metric and imperial. Shows BMI value, health category, and standard range guidelines.
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BMI categories
- Under 18.5 — Underweight
- 18.5 – 24.9 — Normal weight
- 25.0 – 29.9 — Overweight
- 30.0 and above — Obese
These are the categories used by the World Health Organization (WHO) for adults.
About BMI
BMI is a simple ratio of weight to height squared. It is widely used as a screening tool but has known limitations — it does not account for muscle mass, bone density, age, or fat distribution. Use it as one data point, not a diagnosis.
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FAQ
- What is a healthy BMI range?
- According to standard guidelines: Underweight below 18.5, Normal 18.5–24.9, Overweight 25–29.9, Obese 30+.
- Can I use imperial units (feet and pounds)?
- Yes — toggle to Imperial to enter height in feet/inches and weight in pounds.
- Is BMI the best measure of health?
- BMI is a simple screening tool. It does not account for muscle mass, bone density, or fat distribution. Consult a doctor for full assessment.