BMI: Understanding Your Body Mass Index and What It Really Means

What is BMI?

Body Mass Index (BMI) is a simple calculation that uses your height and weight to estimate whether you have a healthy body weight.

How BMI is Calculated

The formula is straightforward:

BMI = Weight (kg) / Height (m)�

For example, a person who weighs 70 kg and is 1.75 meters tall has a BMI of 22.9.

BMI Categories

• Below 18.5: Underweight
• 18.5 to 24.9: Normal weight
• 25.0 to 29.9: Overweight
• 30.0 and above: Obese

Limitations of BMI

While BMI is a useful screening tool, it has important limitations:

Muscle vs. Fat

BMI doesn't distinguish between muscle and fat. A highly muscular athlete might have a high BMI despite having very little body fat.

Body Composition

Two people with the same BMI can have very different body compositions. BMI doesn't tell you where your fat is distributed.

Age and Gender

Body fat naturally increases with age, and women typically have more body fat than men at the same BMI.

Using BMI Alongside Other Metrics

For a more complete picture of your health, consider:

• Waist circumference to assess abdominal fat
• Body fat percentage � use our body fat calculator for a direct measure of body composition
• Blood pressure, cholesterol, and blood sugar for metabolic health
• Physical fitness levels including cardiovascular endurance and strength

Calculate Your BMI with Measurely

Use our BMI calculator to get your number instantly. It's free, takes just seconds, and gives you immediate feedback on where you fall in the BMI categories.

For a more complete picture of your metabolism, also check your BMR and read our guide on BMR and weight management.

Check your BMI today as part of your health journey.