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BMI Calculator
Calculate your Body Mass Index instantly. Check if you're at a healthy weight based on your height and weight.
Calculate Your BMI
Enter your weight and height below. Results update instantly.
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Understanding BMI
What is BMI?
Body Mass Index (BMI) is a simple screening method that uses your weight and height to estimate body fat. It's widely used by healthcare professionals to identify potential weight-related health risks.
BMI Categories (WHO Standards)
- Underweight: BMI less than 18.5
- Normal weight: BMI 18.5 – 24.9
- Overweight: BMI 25 – 29.9
- Obesity: BMI 30 or greater
Limitations of BMI
BMI doesn't distinguish between muscle and fat. Athletes with high muscle mass may have a high BMI but low body fat. It also doesn't account for age, sex, or bone density. Always consult a healthcare provider for a comprehensive health assessment.
Frequently Asked Questions
Is BMI accurate for everyone?
No. BMI is a screening tool, not a diagnostic. It doesn't account for muscle mass, bone density, age, or sex. Athletes may be classified as overweight despite having low body fat.
What is a healthy BMI range?
According to the World Health Organization (WHO), a healthy BMI range for adults is 18.5 to 24.9 kg/m².
How do I calculate BMI manually?
Divide your weight in kilograms by the square of your height in meters. Formula: BMI = kg / m². For example, 70 kg / (1.7 m)² = 24.2.
Is this calculator free to use?
Yes, 100% free with no limits, no signup required, and no hidden fees. Use it as many times as you need.