Body Mass Index (BMI) is a cornerstone of modern health assessment. In the USA and around the globe, it’s the primary screening tool used by doctors to determine if a person's weight falls within a healthy range relative to their height. While it doesn’t measure body fat directly, it provides a crucial baseline for your long-term fitness goals.
1. Understanding the Categories
The BMI scale classifies adults into four main categories: Underweight (below 18.5), Normal (18.5-24.9), Overweight (25-29.9), and Obese (30 or higher). Our BMI Calculator uses standard medical formulas to provide your categorization instantly, helping you communicate more effectively with your healthcare providers.
2. Privacy First Analytics
Health data is the most sensitive information you own. Gravity Lab is built with an isolated, "Local-First" architecture. All your height and weight measurements are processed in your browser’s temporary memory (RAM) and are never uploaded to our servers. You get the insights you need without sacrificing an ounce of privacy.
3. When to Look Beyond BMI
While BMI is excellent for general screening, it has limitations. For athletes with high muscle mass or older adults, BMI may not tell the whole story. In these cases, it’s best used alongside other metrics like body fat percentage and waist circumference to get a complete picture of your health status.
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