BMI Calculator | Body Mass Index Health Tracker (Free & Fast)
### How to Calculate BMI
To calculate your Body Mass Index (BMI), use the formula: **Weight (kg) / [Height (m)]²**. For imperial units: **(Weight (lb) / [Height (in)]²) × 703**.
BMI Categories:
- **Underweight:** < 18.5
- **Normal:** 18.5 – 24.9
- **Overweight:** 25 – 29.9
- **Obese:** 30+
Frequently Asked Questions
Is BMI accurate for athletes?
BMI can be misleading for athletes with high muscle mass, as it doesn't distinguish between muscle and fat.