Anorexic BMI Calculator

Medical screening tool to calculate BMI and compare to anorexia nervosa clinical thresholds

⚠️ MEDICAL DISCLAIMER - PLEASE READ This calculator is a screening tool ONLY and cannot diagnose anorexia nervosa. Low BMI is just one physical feature of eating disorders. Diagnosis requires comprehensive medical and psychological evaluation by qualified healthcare professionals. If you have concerns about your weight or eating patterns, please seek immediate professional help.
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For children/teens, use age-specific percentile charts

💡 What is BMI? Body Mass Index is calculated as weight (kg) divided by height squared (m²). It's a screening tool to assess if a person's weight may be affecting their health.
17.2
BMI (kg/m²)
Healthy BMI Range: 18.5 - 25
Assessment Result
📊 Anorexia Nervosa Severity Classification (DSM-5)

Based on Body Mass Index for adults. These are clinical guidelines, not diagnostic criteria alone.

BMI Range Classification Clinical Significance
≥ 18.5 HEALTHY Normal weight range for adults
17.5 - 18.49 BORDERLINE Below healthy range, warrants evaluation
17 - 17.49 MILD May meet criteria for mild anorexia nervosa
16 - 16.99 MODERATE Moderate severity, requires professional intervention
15 - 15.99 SEVERE Severe condition, urgent medical care needed
< 15 EXTREME Life-threatening, immediate hospitalization required
Important Note on BMI Limitations BMI below 13.5 can lead to organ failure. BMI below 12 can be life-threatening. However, BMI is only ONE indicator and does not account for muscle mass, bone density, age, or individual variation. Comprehensive medical evaluation is essential.
🏥 When to Seek Professional Help
  • National Eating Disorders Helpline: 1-800-931-2237 (available 24/7)
  • Crisis Text Line: Text "NEDA" to 741741
  • SAMHSA National Helpline: 1-800-662-4357
  • Emergency: Call 911 or go to nearest emergency room
  • Find Treatment: Visit nationaleatingdisorders.org/help-support/