BMI Calculator

Calculate Body Mass Index from height and weight, metric or imperial.

Configuration Parameters

Height (cm)

Weight (kg)

22.9

Normal

BMI is a general screening indicator and does not account for muscle mass, age or body composition. Consult a professional for medical advice.

Body Mass Index estimates whether your weight is in a healthy range for your height. It is a quick screening number, not a diagnosis.

BMI = weight(kg) ÷ height(m)². In imperial units it becomes 703 × weight(lb) ÷ height(in)². The same value results either way.

Below 18.5 is underweight, 18.5–24.9 normal, 25–29.9 overweight, and 30+ obese. These bands come from population health studies.

BMI ignores muscle, bone density and fat distribution, so athletes may read high. Treat it as one signal among many.

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