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What is the BMI for someone 5'9" and 100 lbs?

Answer
BMI: 14.8 (Underweight)
Normal weight range for 5'9": 125-169 lbs25 lbs below normal rangeConsider consulting a healthcare provider

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How We Calculated This

BMI = (weight × 703) / height²

(100 × 703) / (69 × 69) = 70,300 / 4761 = 14.8

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Calculated using verified formulas. Last updated March 2026.