Free Tool

BMI Calculator

Body Mass Index is a quick, widely used screening measure based on your height and weight. Enter your details below to calculate yours, see where it falls on the standard scale, and understand what it does and doesn't tell you.

Standard BMI Categories

Underweight Below 18.5
Healthy Weight 18.5 to 24.9
Overweight 25.0 to 29.9
Obesity 30.0 and above

These ranges follow the WHO and CDC adult BMI classification and are intended as a general screening reference, not a diagnosis.

What BMI Does and Doesn't Tell You

It's a Screening Tool

BMI estimates body fat using only height and weight. It's useful as a quick, population level screening measure, not a precise individual diagnostic test.

It Doesn't Measure Muscle

BMI can't distinguish muscle from fat. Very muscular individuals may score higher on the scale without carrying excess body fat.

It Varies by Individual

Age, sex, ethnicity, bone density, and overall body composition all affect how meaningful a given BMI number is for one specific person.

It's a Starting Point

A result outside the typical range is a reason to have a conversation with a doctor, not a verdict on your health. Context always matters more than the number alone.

This calculator is for general informational purposes only and does not provide medical advice, diagnosis, or treatment. BMI is one of many factors used to assess health and should always be interpreted alongside a full evaluation by a qualified doctor. If you have concerns about your weight, nutrition, or overall health, please book a consultation with a doctor on Doctiplus rather than relying on this tool alone.