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BMI Calculator

Calculate your Body Mass Index instantly. Get your BMI category, healthy weight range, and personalised health insights β€” in metric or imperial units.

Your Details
KG
CM
YRS
Your BMI
β€”
BMI Scale β€” Where You Stand
1018.5253040
Underweight
< 18.5
Normal
18.5–24.9
Overweight
25–29.9
Obese I
30–34.9
Obese II+
35+
β€”
Your BMI
β€”
Ideal Weight
β€”
Difference
Your Healthy Weight Range
Minimum healthy weight β€”
Maximum healthy weight β€”
Ideal midpoint weight β€”
Weight to gain/lose β€”

What is BMI?

BMI (Body Mass Index) = Weight (kg) Γ· HeightΒ² (mΒ²)

BMI is a simple number that classifies your body weight relative to your height. It is widely used as a screening tool to identify whether a person is underweight, normal weight, overweight, or obese.

BMI Categories (WHO standard):
Below 18.5 = Underweight Β· 18.5–24.9 = Normal weight Β· 25–29.9 = Overweight Β· 30–34.9 = Obese Class I Β· 35–39.9 = Obese Class II Β· 40+ = Obese Class III

Important note: BMI is a screening tool, not a diagnostic one. Athletes with high muscle mass may have a high BMI without excess fat. Always consult a healthcare professional for a complete health assessment.

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