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BMI Calculator: Body Mass Index and Healthy Weight Range

calendar_today 28 Jun 2026 5 min read

BMI (Body Mass Index) is a screening tool using height and weight. It does not measure body fat directly but helps flag underweight or excess weight risks.

BMI formula

BMI = weight (kg) ÷ height (m)²

Example: 70 kg, 1.75 m → BMI = 70 / (1.75×1.75) ≈ 22.9 (normal range).

Adult categories (WHO)

  • Below 18.5 — Underweight
  • 18.5 – 24.9 — Normal
  • 25 – 29.9 — Overweight
  • 30+ — Obese

Limitations

Athletes with high muscle mass may show high BMI without excess fat. Consult a doctor for personal health advice.

Use Master Calc BMI Calculator with Ideal Weight and Calorie Calculator for wellness planning.

Disclaimer: Not a medical diagnosis. See a healthcare professional.