BMI Calculator
Calculate your Body Mass Index to understand your weight category
Enter your weight and height to calculate your BMI
Medical Disclaimer
This calculator is for informational and educational purposes only. It is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.
Your data is calculated locally in your browser and is never stored on our servers.
Read full medical disclaimer →What is BMI?
Body Mass Index (BMI) is a simple calculation using a person's height and weight. The formula is BMI = kg/m² where kg is a person's weight in kilograms and m² is their height in metres squared. BMI is a useful measure of overweight and obesity at a population level.
Limitations of BMI
- Does not distinguish between muscle and fat mass
- May not be accurate for athletes or highly muscular individuals
- Does not account for age, gender, or ethnicity variations
- Not applicable for children or pregnant women
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Quick answer
Medikle BMI Calculator
The Medikle BMI Calculator estimates adult Body Mass Index from height and weight, then explains whether the result falls in the underweight, healthy weight, overweight, or obesity range.
How BMI is calculated
BMI is calculated by dividing weight in kilograms by height in meters squared. In imperial units, the same relationship is converted from pounds, feet, and inches before the score is shown.
- BMI = weight in kg / height in meters squared.
- A BMI from 18.5 to 24.9 is commonly considered the healthy adult range.
- BMI is a screening measurement, not a diagnosis.
When to use this calculator
Use this tool for a quick adult weight-category check, to discuss weight goals with a clinician, or to compare progress over time. BMI is less precise for athletes, pregnant people, children, older adults, and people with unusual muscle mass or fluid retention.
Frequently asked questions
What is the Medikle BMI Calculator?v
The Medikle BMI Calculator is a free Body Mass Index tool that uses your height and weight to estimate your adult BMI category and healthy weight range.
What BMI range is considered healthy?v
For most adults, a BMI from 18.5 to 24.9 is commonly considered the healthy weight range. BMI should be interpreted with medical history, body composition, and clinician guidance.
Can BMI diagnose obesity or health risk by itself?v
No. BMI is a screening measure. It does not directly measure body fat, muscle mass, or metabolic health, so it should not replace professional medical advice.
Medical sources
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