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What Does Your BMI Really Mean?

BMI is one of the most talked-about health numbers—but how useful is it really?

What Is BMI?

BMI (Body Mass Index) is a calculation that uses your height and weight to categorize you into ranges like underweight, normal weight, overweight, and obese. The formula is:

BMI = weight (kg) / [height (m)]²

For example, someone who is 1.70 meters tall and weighs 68kg would have a BMI of 23.5.

BMI Categories

• Underweight: BMI less than 18.5
• Normal: 18.5 – 24.9
• Overweight: 25 – 29.9
• Obese: 30 and above

The Good, the Bad, and the Incomplete

✅ The Good: It’s easy to calculate and helps identify population-level trends.

⚠️ The Bad: It doesn’t differentiate between fat and muscle. Athletes can be labeled overweight despite having low body fat.

🧠 The Incomplete: It ignores age, gender, fat distribution, and health habits.

What Should You Do Instead?

Use BMI as a starting point, not a verdict. Pair it with tools like our Body Fat Calculator for a more complete picture of your health.

Final Note

Your health is more than a number. Eat well, move your body, and talk to professionals—not just calculators.