BMI Calculator – Calculate Your Body Mass Index

What Is BMI?

Body Mass Index (BMI) is a simple calculation using a person's height and weight. It is an inexpensive and easy screening method for weight category underweight, healthy weight, overweight, and obesity.

Understanding Your Score

The standard weight status categories associated with BMI ranges for adults are same for men and women of all body types and ages.

BMI Range	Weight Status
Below 18.5	Underweight
18.5 – 24.9	Normal or Healthy Weight
25.0 – 29.9	Overweight
30.0 and Above	Obese

Limitations of BMI

While BMI is useful for the general population, it has significant blind spots:

Athletes: Muscle is denser than fat. A bodybuilder may have a "High" BMI but very low body fat.
Elderly: Older adults may have more body fat than younger adults with the same BMI.
Distribution: BMI does not account for where fat is stored (e.g., belly fat is more dangerous than subcutaneous fat).

For a more accurate picture of your health, combine BMI with waist circumference measurements or use our Body Fat Calculator.

What Next?

If your BMI indicates you are overweight or underweight, the next step is to look at your diet and activity level.

Calculate Calories

Find your weight loss targets.

Get a Diet Plan

Structured eating for health.

Frequently Asked Questions

Is BMI 100% accurate?

No. BMI is a screening tool, not a diagnostic one. It does not distinguish between muscle mass and body fat, so athletes may be classified as 'overweight' despite having low body fat.

What is a healthy BMI?

For most adults, a healthy BMI falls between 18.5 and 24.9. However, this range can vary based on ethnicity and age.

Does age affect BMI?

Yes. Older adults often have more body fat than younger adults with the same BMI. Conversely, children use separate BMI percentile charts.