BMI Calculator Metric and Imperial
Calculate Body Mass Index with metric or imperial units.
Your BMI Is
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What is BMI Calculator?
Evaluate your Body Mass Index by comparing your weight against your height in metric kilograms and centimeters or imperial pounds and inches. It instantly classifies your physical health profile into World Health Organization standard categories: Underweight (below 18.5), Normal weight (18.5 to 24.9), Overweight (25 to 29.9), and Obese (30 and above). Whether tailoring a gym nutrition regimen, monitoring weight loss progress, or reviewing clinical wellness markers, this tool provides instant insight into healthy target weight boundaries.
How to Use BMI Calculator in 4 Easy Steps
Step 1
Choose your preferred measurement system: Metric (cm / kg) or Imperial (ft-in / lbs).
Step 2
Enter your current height and body weight into the respective input fields.
Step 3
View your calculated BMI score along with your highlighted health category status.
Step 4
Review the recommended healthy weight range tailored specifically to your height.
Honest Technical Specifications & Limits
Standard Formulas
Uses the standard Quetelet index formula (kg / m²).
Scope
Designed as a general screening tool for adult men and women.
Clinical Context
Does not directly differentiate between bone density, muscle mass, and body fat.
Privacy First: 100% Client-Side In-Browser Processing
100% In-Browser Local Execution. BMI Calculator operates directly inside your browser memory using client-side JavaScript and WebAssembly. Your data is never transmitted over the internet or logged on remote servers. You can open Developer Tools (F12) Network tab to verify zero outbound network calls.
Verify it yourself: Open your browser's Developer Tools (F12 or Inspect), switch to the Network tab, and perform your action. You will observe zero outbound data uploads — your data never leaves your computer.
Popular Real-World Use Cases
Fitness & Weight Loss Tracking
Establish a baseline fitness metric and track progress toward your ideal body weight throughout workout routines.
Preventative Health Screenings
Check if your body weight falls within recommended cardiovascular and metabolic wellness ranges.
Dietary & Nutrition Planning
Calculate target weight goals to determine healthy daily caloric intake recommendations with nutritionists.
Calculations, Formulas & Practical Examples
Body Mass Index (BMI) Equation
Classifications: Underweight (<18.5), Normal (18.5-24.9), Overweight (25-29.9), Obese (>=30.0).
Metric BMI Evaluation
Adult weighing 70 kg with a height of 175 cm (1.75 m).