BMI Calculator

Calculate your Body Mass Index (BMI) instantly. Understand your weight category and ideal range.

📏 Metric (cm, kg)
📐 Imperial (ft/in, lbs)
24.2
Normal weight
BMI = weight / (height)²

📊 BMI Categories

  • Underweight: < 18.5
  • Normal weight: 18.5 – 24.9
  • Overweight: 25 – 29.9
  • Obese: ≥ 30
BMI is a screening tool; consult a healthcare professional for accurate assessment.

✨ Why Use Our BMI Calculator?

  • Two unit systems – Switch between metric (cm/kg) and imperial (ft/in/lbs).
  • Instant results – BMI and weight category update as you type.
  • Clear category display – Color-coded categories: underweight, normal, overweight, obese.
  • Educational info – See BMI categories and what they mean.
  • 100% free & private – No signup, all calculations happen in your browser.

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