BMI Calculator

Input Fields

• Select your preferred unit system (metric or imperial)
• Enter your current weight in kilograms or pounds
• Enter your height in centimeters or inches
• The calculator will automatically update your BMI result

Calculations

• BMI Formula: BMI = weight (kg) / height (m)² or weight (lbs) / height (in)² × 703
• BMI Categories: Underweight, Normal weight, Overweight, and Obese classifications
• Healthy Weight Range: Recommended weight range for your height based on BMI 18.5-24.9

Tips for Accurate Results

• Measure your height without shoes
• Weigh yourself in the morning on an empty stomach
• Use consistent units (metric or imperial)
• BMI is a screening tool, not a diagnostic measure
• Consult healthcare professionals for personalized advice

BMI Formula

BMI is calculated by dividing your weight in kilograms by the square of your height in meters. For imperial units, the formula is adjusted with a conversion factor of 703.

BMI Categories

BMI categories help classify weight status: Underweight (BMI < 18.5), Normal weight (BMI 18.5-24.9), Overweight (BMI 25.0-29.9), and Obese (BMI ≥ 30.0) with further subdivisions for obesity classes.

BMI Limitations

BMI doesn't distinguish between muscle and fat mass, so athletes may have high BMI despite being healthy. It also doesn't account for age, sex, ethnicity, or body composition. BMI is best used as a screening tool alongside other health assessments.