BMI Calculator
Body Mass Index — calculate yours using WHO standards and find your healthy weight range.
Healthy weight
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for your height
Weight—
Height—
BMI (weight ÷ height²)—
To reach healthy range—
Healthy weight range—
Note: BMI is a screening tool, not a diagnosis. It does not account for muscle mass or fat distribution. Athletes may score "overweight" while being healthy. Always consult a healthcare provider for personalized advice.
BMI — Frequently asked questions
What is a healthy BMI?
WHO defines: Underweight → below 18.5 · Normal → 18.5–24.9 · Overweight → 25–29.9 · Obese class I → 30–34.9 · Obese class II → 35–39.9 · Obese class III → 40+. Some populations (e.g. Asian) may use lower thresholds.
Is BMI accurate for everyone?
No. BMI cannot distinguish muscle from fat. A muscular athlete may show "overweight" BMI despite low body fat. Waist circumference and DEXA scans are more accurate for individuals. BMI works best as a population-level screening tool.
How do I convert lbs and inches to metric?
Pounds to kg: divide by 2.205 · Inches to cm: multiply by 2.54. For example, 150 lbs = 68 kg; 5'8" = 172.7 cm.