BMI Calculator
Calculate Your BMI
Your Results
Enter your measurements to see results.
About This Tool
The Body Mass Index (BMI) is a universally recognized screening tool used to estimate a person’s body fat based on their height and weight. While it doesn't directly measure body fat, it correlates with direct measures and serves as an excellent initial indicator of health status. Our BMI Calculator uses the standard World Health Organization (WHO) formula to categorize results into Underweight, Normal Weight, Overweight, and Obesity classes. It is a vital tool for anyone monitoring their fitness journey, enabling you to set realistic weight goals and understand your risk factors for health conditions like heart disease and diabetes. Understanding your body metrics is the first step toward achieving your health and fitness goals. This calculator uses scientifically validated formulas endorsed by health organizations worldwide, ensuring accuracy you can trust. The results provide personalized insights that help you make informed decisions about your diet, exercise routine, and lifestyle choices. Whether you're trying to lose weight, build muscle, or simply maintain a healthy lifestyle, this tool gives you the data-driven guidance you need. It's perfect for fitness enthusiasts, athletes, nutritionists, and anyone committed to improving their health through measurable, evidence-based approaches.
How to Use This Tool
Select System
Choose Metric (cm/kg) or Imperial (ft/lbs) units.
Enter Height
Input your accurate height.
Enter Weight
Input your current weight.
Calculate
Click to see your BMI score and category.
Key Features
- Instant Assessment: Get a snapshot of your weight health in seconds.
- Health Screening: Identify potential risks related to being underweight or overweight.
- Goal Setting: Use your BMI to determine a target healthy weight range.
- WHO Standards: Uses internationally accepted medical classifications.
- Privacy Focused: Your health data is processed locally and never stored.
Frequently Asked Questions
What is a 'normal' BMI?
According to WHO, a BMI between 18.5 and 24.9 is considered normal weight.
Is BMI accurate for athletes?
Not always. Muscle is denser than fat, so athletes may have a high BMI ('Overweight') despite having low body fat. Use our Body Fat Calculator for better precision.
Does age affect BMI?
The standard formula applies to adults (18-65). For children and seniors, interpretations may vary.