⚖️ BMI Calculator

Calculate Body Mass Index from height and weight.

Weight (kg)

Height (cm)

📋 How to Use

1. Enter your height and weight (metric or imperial).
2. Click Calculate to get your Body Mass Index.
3. See which BMI category (underweight, normal, overweight, obese) your result falls into.

✅ Features

Supports both metric (cm/kg) and imperial (ft-in/lb) units.
Shows the standard WHO BMI category alongside your number, not just the raw figure.
A quick screening tool — the page also notes it isn't a substitute for medical advice.

What is BMI?

Body Mass Index (BMI) is a quick screening number calculated from your weight and height: weight in kilograms divided by height in metres squared. It is used worldwide as a simple first check of whether a person's weight is in a healthy range for their height.

Standard adult BMI ranges (WHO)

Below 18.5 – underweight
18.5 – 24.9 – normal weight
25 – 29.9 – overweight
30 and above – obese

Some health bodies use slightly lower cut-offs for South Asian adults, because health risks can start at a lower BMI.

Limitations to keep in mind

BMI does not measure body fat directly. Muscular people can show a high BMI while being very fit, and it is not designed for children, pregnant women or older adults in the same way. Treat the result as a starting point, and speak to a doctor for a proper health assessment.

Frequently Asked Questions

Is BMI an accurate measure of health for everyone?

No — BMI is a simple screening tool based only on height and weight. It doesn't distinguish muscle from fat and can be misleading for athletes, older adults, or certain body types. It's a starting point, not a diagnosis.

What BMI range is considered "normal"?

The commonly used WHO range for adults is roughly 18.5–24.9. Below that is classified underweight, and above it moves into overweight and obese categories — this tool shows which category your result falls into.