Free BMI Calculator Online

Calculate your BMI, ideal weight, daily calorie needs, and body fat percentage. All calculations happen instantly in your browser. Free, no registration required.

⚖️BMI CalculatorCalculate your Body Mass Index (BMI) and see your weight category — underweight, normal, overweight, or obese.🎯Ideal WeightFind your ideal body weight range using multiple formulas (Devine, Robinson, Miller, Hamwi).🔥Calorie (TDEE)Calculate your Total Daily Energy Expenditure (TDEE) and daily calorie needs based on activity level.📐Body Fat %Estimate your body fat percentage using the US Navy method with waist, neck, and hip measurements.

What is BMI?

Body Mass Index (BMI) is a measure of body fat based on height and weight. BMI = weight(kg) ÷ height(m)². A BMI under 18.5 is underweight, 18.5–24.9 is normal, 25–29.9 is overweight, and 30+ is obese.

While BMI is a useful screening tool, it does not directly measure body fat. Use the Body Fat % calculator for a more accurate estimate of your body composition.