BMI Calculator
Unit System
cm
kg
Your BMI
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Category
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Healthy weight range (BMI 18.5 - 24.9)
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About This Calculator
This calculator uses the standard BMI formula — weight in kilograms divided by height in meters squared (kg/m²) — adopted by the World Health Organization. It classifies results into underweight, normal, overweight, and obese categories, and shows the weight range that corresponds to a normal BMI of 18.5 - 24.9 for your height. BMI is widely used by healthcare providers as a quick screening tool during checkups, though it does not directly measure body fat and may be less accurate for athletes or older adults.
FAQ
What is BMI?
BMI (Body Mass Index) estimates body fat based on weight and height: weight (kg) / height² (m). It is a screening tool, not a diagnosis.
Is BMI accurate for athletes?
BMI may overestimate body fat in muscular people and underestimate it in those with low muscle mass. Consider body fat %, waist size, and fitness too.
What is a healthy BMI range?
WHO ranges: Underweight <18.5, Normal 18.5 - 24.9, Overweight 25 - 29.9, Obese ≥30.
How can I lower my BMI?
Combine a balanced diet with regular activity (cardio + strength). Consult a healthcare professional before starting a plan.