BMI Calculator

Check your Body Mass Index instantly

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About This Tool

The BMI Calculator helps you quickly determine your Body Mass Index using your height and weight. BMI is a widely used screening metric developed by the World Health Organization (WHO) to categorize individuals into Underweight, Normal weight, Overweight, and Obese ranges. Use this tool as a quick first check, and always consult a healthcare professional for a full health assessment.

How to Use

  1. Enter your height and select your unit (cm, ft, or in).
  2. Enter your weight and select your unit (kg or lbs).
  3. Click Calculate BMI to compute your body mass index.
  4. View your BMI value and corresponding weight category displayed below the form.

Frequently Asked Questions

Is BMI accurate for everyone?

BMI is a general screening tool and doesn't account for muscle mass, bone density, or overall body composition. Athletes may have a high BMI due to muscle, not fat.

What if my BMI is too high or low?

Consult a healthcare provider for personalized advice. BMI is just one indicator of health and should not be used as a sole diagnostic tool.

Is my data stored?

No. All calculations are performed locally in your browser. Your height and weight values never leave your device.

What's a healthy BMI range?

A BMI between 18.5 and 24.9 is considered Normal weight. Below 18.5 is Underweight, 25–29.9 is Overweight, and 30+ is Obese.

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