BMI Calculator
Calculate your Body Mass Index and understand your health category
About the BMI Calculator
Our free online BMI (Body Mass Index) calculator helps you quickly assess whether your weight falls within a healthy range based on your height. BMI is a widely used screening tool for weight categories that may lead to health problems.
How to Use
- Choose Metric (cm/kg) or Imperial (ft/in/lb) units
- Enter your height and weight
- Click "Calculate BMI" to see your BMI and health category
BMI Categories
- Below 18.5 — Underweight
- 18.5 to 24.9 — Normal weight
- 25.0 to 29.9 — Overweight
- 30.0 and above — Obese
Disclaimer: BMI is a screening tool and does not diagnose body fatness or health. Consult a healthcare professional for a complete health assessment.
Frequently Asked Questions
Select your preferred unit system (Metric cm/kg or Imperial ft/in/lb), enter your height and weight, then click "Calculate BMI" to see your results instantly.
BMI = weight (kg) / height (m)². For imperial units: BMI = (weight (lb) / height (in)²) × 703. Our calculator handles both unit systems automatically.
Yes, our BMI calculator uses the standard BMI formula recommended by health organizations worldwide. Results are calculated precisely based on your input values.
Underweight: <18.5, Normal: 18.5-24.9, Overweight: 25-29.9, Obese: ≥30. These categories help assess weight relative to height for health screening.
BMI is a useful screening tool but doesn't account for muscle mass, bone density, or body composition. For comprehensive assessment, consult a healthcare provider.