BMI Calculator
Calculate your Body Mass Index (BMI) to determine if you're at a healthy weight. Enter your height and weight below to get your BMI score and health category with personalized recommendations.
📊 Enter Your Details
📈 Your BMI Result
Ready to Calculate
Enter your height and weight above, then click "Calculate BMI" to see your Body Mass Index and health category.
BMI Categories
| BMI Range | Category | Health Risk |
|---|---|---|
| Below 18.5 | Underweight | Increased risk of malnutrition, osteoporosis |
| 18.5 - 24.9 | Normal Weight | Lowest health risk |
| 25.0 - 29.9 | Overweight | Increased risk of heart disease, diabetes |
| 30.0 and above | Obese | High risk of serious health conditions |
How to Use the BMI Calculator
Choose Units
Select your preferred measurement system: Metric (kg/cm) for kilograms and centimeters, or Imperial (lbs/ft) for pounds and feet/inches. The calculator supports both systems.
Enter Height & Weight
Input your current height and weight accurately. For metric: height in centimeters, weight in kilograms. For imperial: height in feet and inches, weight in pounds.
Calculate BMI
Click "Calculate BMI" or enable auto-calculate for instant results. Your BMI will be calculated using the standard formula: weight (kg) ÷ height (m)².
Review Results
See your BMI score, health category (Underweight, Normal, Overweight, or Obese), and personalized health recommendations based on your results.
Frequently Asked Questions
How accurate is BMI as a health indicator?
+BMI is a useful screening tool for weight categories, but it has limitations. It doesn't distinguish between muscle and fat mass, so athletes or very muscular individuals may have high BMIs despite being healthy. BMI also doesn't account for age, gender, or body composition. It's best used as a general guideline alongside other health assessments.
What should I do if my BMI indicates I'm overweight or obese?
+If your BMI is above the normal range, consult with a healthcare professional for personalized advice. They can assess your overall health, consider factors BMI doesn't measure, and recommend appropriate lifestyle changes. Generally, a combination of balanced nutrition, regular physical activity, and gradual weight loss (1-2 pounds per week) is recommended.
Is BMI calculation different for children and teenagers?
+Yes, BMI for children and teens (ages 2-19) is calculated the same way but interpreted differently using age and gender-specific percentiles rather than fixed categories. This accounts for normal growth patterns. Our calculator is designed for adults (18+). For children, consult pediatric BMI charts or healthcare providers.
Why might someone with a lot of muscle have a high BMI?
+BMI only considers height and weight, not body composition. Muscle tissue is denser than fat tissue, so athletes, bodybuilders, or people with high muscle mass may have BMIs in the "overweight" or "obese" range despite having low body fat percentages and excellent health. Additional measurements like body fat percentage or waist circumference provide better health assessments for these individuals.
How often should I calculate my BMI?
+For general health monitoring, calculating BMI monthly or quarterly is sufficient since healthy weight changes occur gradually. If you're actively trying to lose or gain weight, weekly calculations can help track progress. However, don't obsess over daily fluctuations - weight naturally varies due to factors like hydration, food intake, and hormonal changes.