BMI Calculator
⚖️ BMI Calculator
Body Mass Index — Check Your Health Status Instantly
🎯 Your Healthy Weight Range
📜 BMI History
No BMI calculations yet
📖 How to Use the BMI Calculator — Complete Guide
⚖️ How to Calculate Your BMI
- Choose your unit system: Metric (kg/cm) or Imperial (lbs/ft/in).
- Enter your weight and height. The result appears instantly as you type.
- Check the BMI value, category (Underweight, Normal, Overweight, Obese), and the color‑coded scale.
- Review the additional metrics: Ideal Weight Range, Ponderal Index, and Body Surface Area.
📊 BMI Categories (WHO)
| BMI Range | Category | Health Risk |
|---|---|---|
| Below 18.5 | Underweight | Increased |
| 18.5 – 24.9 | Normal Weight | Lowest |
| 25.0 – 29.9 | Overweight | Moderate |
| 30.0 and above | Obese | High to Very High |
📐 BMI Formula
Metric: BMI = weight (kg) / height² (m)
Imperial: BMI = 703 × weight (lbs) / height² (inches)
Dual Units
Switch between Metric and Imperial.
Visual Scale
Color‑coded bar with your position.
Detailed Metrics
Ideal weight, Ponderal Index, BSA.
History
Your last 10 calculations are saved locally.
100% Private
All data stays on your device.
Mobile‑Friendly
Works perfectly on all screens.
❓ FAQ
BMI (Body Mass Index) is a number calculated from your weight and height. Formula: weight (kg) / height² (m). Use our calculator above for instant results.
A healthy BMI for adults is between 18.5 and 24.9. Below 18.5 is underweight, 25‑29.9 is overweight, and 30+ is obese.
BMI is a general guideline. It may overestimate body fat in muscular individuals and underestimate it in older people. It's best used as a screening tool.
Yes, switch to the Imperial tab and enter your weight in pounds and height in feet/inches.
No, all calculations happen locally. Your weight and height never leave your device. BMI history is stored only in your browser.