Medical Disclaimer
This calculator is for informational and educational purposes only.
- Not Medical Advice: The information provided does not constitute medical advice, diagnosis, or treatment.
- Consult a Healthcare Professional: Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.
- No Doctor-Patient Relationship: Use of this calculator does not create a doctor-patient relationship.
- Accuracy Not Guaranteed: While we strive for accuracy, we make no warranties regarding the completeness, reliability, or accuracy of this information.
- Emergency Situations: Never disregard professional medical advice or delay in seeking it because of something you have calculated or read on this website.
BMI Calculator
Calculate your Body Mass Index (BMI) instantly. Get your BMI score, category, and healthy weight range. Supports metric (cm, kg) and imperial (ft/in, lbs) units. 100% free and private.
Instant Results
Get your BMI score and category instantly with just a few clicks.
Flexible Units
Use metric (cm, kg) or imperial (ft/in, lbs) measurements.
100% Private
All calculations happen in your browser. Your data never leaves your device.
BMI Categories
Underweight
BMI less than 18.5
Normal Weight
BMI between 18.5 and 24.9
Overweight
BMI between 25 and 29.9
Obese
BMI 30 or higher
Frequently Asked Questions
What is BMI?
BMI (Body Mass Index) is a measure of body fat based on height and weight. It is calculated by dividing weight (in kilograms) by the square of height (in meters). BMI is used as a screening tool to identify potential weight problems in adults.
What is a healthy BMI?
A BMI between 18.5 and 24.9 is generally considered a healthy weight. BMI less than 18.5 is underweight, 25-29.9 is overweight, and 30 or higher is obese. However, BMI does not directly measure body fat and may not be accurate for athletes, elderly, or children.
How do I calculate my BMI?
Simply enter your height and weight using either metric (cm and kg) or imperial (feet/inches and lbs) units, then click the Calculate button. The tool will instantly display your BMI, category, and healthy weight range.
Does BMI work for everyone?
BMI is a useful screening tool, but it has limitations. It may not accurately reflect body composition in athletes with high muscle mass, elderly individuals, children, or pregnant women. For a comprehensive health assessment, consult a healthcare professional.
Is my data private?
Absolutely. All BMI calculations happen in your browser. Your height and weight data never get sent to any server, ensuring complete privacy and security.