BMI CalculatorCalculate Your Body Mass Index
Calculate your Body Mass Index (BMI) instantly. Get your BMI score, weight category, and health recommendations — completely free and private.
What is BMI and Why Does It Matter?
Body Mass Index (BMI) is a simple measurement that uses your height and weight to estimate your body fat. It's a widely used tool to screen for weight categories that may lead to health problems.
While BMI is not a perfect measure of health, it provides a useful guideline for understanding whether your weight is within a healthy range. Our BMI calculator gives you instant results with clear category classifications and health recommendations.
All calculations happen locally in your browser — your data never leaves your device, ensuring complete privacy.
How It Works
Choose Units
Select metric or imperial
Enter Values
Input your height and weight
Calculate
Get your BMI score instantly
Review
See category and recommendations
Frequently Asked Questions
What is BMI and how is it calculated?
BMI (Body Mass Index) is calculated by dividing your weight in kilograms by the square of your height in meters (kg/m²). For imperial units, the formula is (weight in lbs / height in inches²) × 703.
Is BMI an accurate measure of health?
BMI is a general indicator of body fat. It may not be accurate for athletes, bodybuilders, pregnant women, and elderly individuals. Always consult a healthcare professional for personalized advice.
What are the different BMI categories?
Underweight (under 18.5), Normal weight (18.5-24.9), Overweight (25-29.9), and Obese (30 and above).
Is my data stored or saved?
No, all calculations happen locally in your browser. Your data never leaves your device, ensuring complete privacy.
Can I use this on mobile?
Yes, the BMI calculator is fully responsive and works great on all devices.
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