Body Mass Index Calculator
"Free Online BMI Calculator lets you instantly calculate your Body Mass Index based on your height and weight. Understand your BMI category — underweight, normal, overweight, or obese — with fast, accurate results. No login or signup required. Quick, private, and easy to use."
🧮 BMI Calculator — Calculate Your Body Mass Index (BMI)
Our Free Online BMI Calculator helps you quickly estimate your Body Mass Index — a widely used health screening tool that uses your height and weight to give you a BMI number and category (like underweight, normal, overweight, or obese). No sign-up, no login, and no app download required — just accurate, instant results right in your browser.
📊 What Is BMI?
Body Mass Index (BMI) is a simple number calculated from your height and weight that gives a general idea of whether your body weight falls into a health-related category. It’s used as a quick screening tool to help people understand if they are underweight, at a healthy weight, or if excess weight may be a concern.
🧠 How It Works
BMI is calculated using this standard formula:
BMI = weight (kg) ÷ height² (m²)
If you use imperial units like pounds and feet/inches, the tool handles the conversion for you so the result is accurate.
Just enter your height and weight, hit “Calculate”, and your BMI score will appear instantly along with a category label.
📈 BMI Categories (Typical Ranges)
| BMI Value | Weight Category |
|---|---|
| < 18.5 | Underweight |
| 18.5 – 24.9 | Normal weight |
| 25 – 29.9 | Overweight |
| ≥ 30 | Obesity |
These categories help you understand where your BMI falls in general health standards.
📱 Why Use This BMI Calculator?
🚀 Instant Results: BMI calculated in seconds with no delays.
📊 Easy & Clear: Simple input fields for height and weight — no confusion.
🔒 Privacy Friendly: Your data is not stored or shared.
🔁 Responsive: Works smoothly on phones, tablets, and desktops.
🧰 Useful Tool: Great for quick health checks or tracking fitness goals.
🩺 Important Notes
BMI is a screening tool, not a diagnosis. It doesn’t measure body fat directly and doesn’t account for muscle mass or body composition.
For a full health assessment, it’s best to consult a healthcare professional.
BMI ranges may vary by age, gender, and population group — this tool provides general guidance.
📍 How to Use the Calculator
Select your preferred units (metric or imperial).
Enter your height and weight.
Tap Calculate BMI and view your score and category instantly.