BMI Calculator - Track Your Body Mass Index | Health Blog

BMI Calculator

Metric (cm/kg)
Imperial (in/lbs)
23.4
Normal weight
BMI Categories:
Underweight: < 18.5
Normal weight: 18.5 - 24.9
Overweight: 25 - 29.9
Obesity: 30 or greater

© 2025 Health Blog. This BMI calculator provides general information only and is not a substitute for professional medical advice.

What is BMI?

BMI (Body Mass Index) is a health metric that helps you understand your body fat level based on height and weight. It’s widely used by doctors, trainers, and health-conscious individuals to assess whether someone is underweight, normal, overweight, or obese. This tool instantly calculates your BMI and gives you a quick snapshot of your physical health status.

How to Use

  1. Enter your height in centimeters (cm).
  2. Enter your weight in kilograms (kg).
  3. Click the “Calculate BMI” button.
  4. View your BMI result and category (e.g., Normal, Overweight).

Why It Matters

Knowing your BMI helps you make informed decisions about your fitness, diet, and lifestyle. It’s a simple yet effective way to track your health progress over time. Whether you're starting a weight loss journey, maintaining your current fitness level, or just curious about your health status, this tool gives you instant insights without needing any medical equipment.

FAQs & Common Issues

  • Q: Is BMI accurate for athletes?
    Not always. Athletes may have high muscle mass, which can skew BMI results. Use additional health metrics for better accuracy.
  • Q: What is a healthy BMI range?
    Typically, 18.5 to 24.9 is considered normal. Below 18.5 is underweight, and above 25 is overweight or obese.
  • Q: Can children use this calculator?
    This tool is designed for adults. For children, BMI interpretation requires age-specific percentiles.
  • Q: Is this tool free?
    Yes, it’s 100% free and requires no login or registration.

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