Home › Geometry › BMI Calculator
BMI Calculator
Enter weight and height — BMI and category update instantly.
Formula
BMI = weight (kg) / height² (m²)
WHO Categories
| BMI | Category |
|---|---|
| < 18.5 | Underweight |
| 18.5 – 24.9 | Normal weight |
| 25 – 29.9 | Overweight |
| ≥ 30 | Obese |
FAQ
What are BMI's limits?
BMI ignores muscle vs fat — athletes often score "overweight" while being healthy. Use it as a population-level screening tool, not a diagnosis.
What is a healthy BMI range?
18.5–24.9 per the WHO. For a 175 cm person that is roughly 57–76 kg.