What is BMI?
BMI (Body Mass Index) is a simple calculation that uses your height and weight to estimate whether you're in a healthy weight range. It's widely used by doctors, fitness trainers, and health organizations worldwide.
How to Use This BMI Calculator
- Choose your preferred unit: Metric (kg/cm) or Imperial (lb/in)
- Enter your weight
- Enter your height
- Click Calculate BMI
- See your BMI value and category instantly
BMI Categories
- Underweight: BMI below 18.5
- Normal weight: BMI 18.5 - 24.9
- Overweight: BMI 25 - 29.9
- Obese: BMI 30 and above
Why Use This Tool?
- 100% Free — No signup required
- Instant Results — Calculate in seconds
- Privacy-First — All processing local
- Both Units — Metric and Imperial
- Mobile-Friendly — Works on any device
Frequently Asked Questions
What is a healthy BMI?
For most adults, a healthy BMI is between 18.5 and 24.9.
Is BMI accurate for everyone?
No. BMI is a general guideline. It may not be accurate for athletes, pregnant women, elderly people, or children.
Does this tool store my data?
No. Everything runs locally in your browser. Nothing is sent to any server.