BMI Calculator
Calculate your Body Mass Index (BMI) using metric or imperial units. See your BMI category and healthy weight range.
No sign-up • No server uploads • 100% browser-based
Medical Disclaimer: BMI is a screening tool, not a diagnostic tool. It does not account for muscle mass, bone density, body composition, or ethnic differences. Please consult a qualified healthcare provider for a proper health assessment.
Read Guide: How to Calculate BMI →
How It Works
Enter your height and weight to calculate your Body Mass Index. The tool categorizes your result and shows your healthy weight range.
- Metric: Enter height in centimeters and weight in kilograms. BMI = weight (kg) / height (m)²
- Imperial: Enter height in feet and inches and weight in pounds. BMI = (weight / height²) × 703
- Categories: Underweight (<18.5), Normal (18.5-24.9), Overweight (25-29.9), Obese (30+)
Frequently Asked Questions
What is a healthy BMI?
A BMI between 18.5 and 24.9 is considered healthy for most adults. Below 18.5 is underweight, 25-29.9 is overweight, and 30+ is obese.
Is BMI accurate for athletes?
BMI may overestimate body fat in athletes and those with high muscle mass. It does not distinguish between muscle and fat.
Is this tool a substitute for medical advice?
No. This is for informational purposes only. Always consult a healthcare professional for health-related decisions.
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