BMI Calculator
Calculate your Body Mass Index and check your health status
Your Details
BMI Results
Health Information
BMI Categories
Health Disclaimer
This BMI calculator provides general health information only and should not replace professional medical advice. BMI may not accurately reflect health status for athletes, elderly, or individuals with specific medical conditions. Please consult a healthcare professional for personalized health guidance.
What is BMI Calculator?
A BMI (Body Mass Index) calculator determines your body mass index by dividing your weight by the square of your height. It's a widely used screening tool to categorize individuals as underweight, normal weight, overweight, or obese.
Essential for health assessments, fitness planning, medical evaluations, and understanding your weight status relative to health recommendations.
BMI Formula & Calculation
Metric Formula
BMI = Weight (kg) ÷ Height (m)²
Imperial Formula
BMI = (Weight (lbs) ÷ Height (inches)²) × 703
Example Calculation
Person weighing 70kg with height 1.75m: BMI = 70 ÷ (1.75)² = 22.9
BMI Categories & Health Implications
Underweight (Below 18.5)
May indicate malnutrition, eating disorders, or underlying health conditions. Consider consulting a healthcare provider.
Normal Weight (18.5-24.9)
Indicates healthy weight range associated with lowest risk of weight-related health problems.
Overweight (25-29.9)
Increased risk of cardiovascular disease, diabetes, and other health conditions. Lifestyle changes recommended.
Obese (30 and above)
Significantly increased health risks. Medical consultation recommended for weight management strategies.
Frequently Asked Questions
Is BMI accurate for everyone?
BMI doesn't distinguish between muscle and fat mass. Athletes with high muscle mass may have high BMI but low body fat.
What's a healthy BMI range?
Generally 18.5-24.9 is considered healthy, but optimal ranges may vary by age, ethnicity, and individual health factors.
How often should I check my BMI?
Monthly or quarterly monitoring is sufficient for most people, unless actively trying to lose or gain weight under medical supervision.