BMI Calculator – Check Your Body Mass Index Instantly
Want to know if you’re underweight, at a healthy weight, or overweight? This free BMI calculator gives you instant results. Just enter your height and weight in either metric or imperial units, and the tool will calculate your Body Mass Index (BMI) in seconds.
Note: For imperial units, enter total inches (e.g., 5’8" = 68 inches).
Note: BMI is a quick screening tool to assess your body weight relative to your height. It does not directly measure body fat and may not be accurate for athletes or individuals with a high muscle mass. Other factors, such as age, gender, and body composition, should be considered when evaluating your health.
🧮 What Is BMI and Why Does It Matter?
BMI, or Body Mass Index, is a simple number that compares your weight to your height. It helps estimate whether you're within a healthy weight range. While it's not a perfect measure of health, it’s commonly used by doctors, fitness experts, and health organizations worldwide.
The World Health Organization generally classifies BMI as follows:
- Underweight: BMI under 18.5
- Normal weight: BMI 18.5 to 24.9
- Overweight: BMI 25 to 29.9
- Obese: BMI 30 and above
Keep in mind that BMI doesn’t account for muscle mass, bone density, or body fat percentage. However, it’s still a useful starting point for evaluating your overall health.
🧑⚕️ How to Use This BMI Calculator
Using this BMI calculator is fast and easy:
- Choose between metric (kg, cm) or imperial (lbs, in) units.
- Enter your weight and height.
- Click “Calculate” and your BMI will appear below.
No math, no formulas — just simple, instant results to help guide your health journey.
⚖️ Why Tracking Your BMI with a Calculator Helps
Tracking your BMI over time can help you stay aware of important changes in your health. Whether you're starting a new fitness plan, adjusting your diet, or simply checking in on your well-being, monitoring your BMI is a useful habit. In addition, it allows you to spot trends early and make better-informed decisions. While BMI doesn’t show the full picture — like muscle or fat percentage — it still offers a quick reference point that’s easy to calculate and understand.
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