BarnMD General Health Hub

BMI Calculator

Calculate your Body Mass Index using WHO guidelines with instant interpretation, healthy weight range, and evidence-based recommendations.

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Enter Your Measurements

Weight (kg)Enter weight in kilograms (1–300 kg)

Height (cm)Enter height in centimeters (50–250 cm)

Clinical Note

BMI is calculated using the formula: weight (kg) / height (m)². Results are classified according to WHO guidelines. BMI is a screening tool and should be interpreted alongside other health indicators.

BMI Reference Table

BMI Range	Category	Health Risk
< 18.5	Underweight	Moderate
18.5 – 24.9	Normal weight	Low
25 – 29.9	Overweight	Moderate
30 – 34.9	Obese Class I	High
35 – 39.9	Obese Class II	Very High
≥ 40	Obese Class III	Extreme

Your results will appear here

Enter your weight and height, then click Calculate BMI to see your full analysis.

Educational use only. BMI is a screening tool that provides a general indication of healthy weight ranges. It should not replace professional medical advice. Always consult a qualified healthcare provider for personalized health guidance.