Anorexic BMI Calculator
Calculate BMI and identify severely underweight ranges.
Body Measurements
BMI Result
Body Mass Index
16.3
Category
Moderately Underweight
⚠️ Important:
Low BMI. Consider consulting with a healthcare provider.
BMI Categories:
Very Severely Underweight: <15
Severely Underweight: 15-15.9
Moderately Underweight: 16-16.9
Underweight: 17-18.4
Normal: 18.5-24.9
💙 Support Available:
If you're struggling with an eating disorder, help is available. Contact a healthcare provider, therapist, or eating disorder helpline for support.
About This Calculator
The Anorexic BMI Calculator helps identify if a person's BMI falls into the severely underweight or anorexic range. This calculator is designed to raise awareness about dangerously low body weight and encourage seeking professional medical help when needed.
Important: BMI below 18.5 is considered underweight, and BMI below 17 indicates moderate to severe underweight. BMI below 15 is considered very severely underweight and requires immediate medical attention. This calculator is for educational purposes and should not replace professional medical evaluation.
Formula & Calculation Method
BMI Calculation:
BMI = Weight (kg) ÷ [Height (m)]²
Or in imperial units:
BMI = [Weight (lbs) × 703] ÷ [Height (inches)]²
BMI Categories:
• Very Severely Underweight: BMI < 15
• Severely Underweight: BMI 15-15.9
• Moderately Underweight: BMI 16-16.9
• Underweight: BMI 17-18.4
• Normal Weight: BMI 18.5-24.9
• Overweight: BMI 25-29.9
• Obese: BMI ≥ 30
How to Use This Calculator
- Select Unit: Choose metric (cm, kg) or imperial (inches, lbs).
- Enter Height: Input your height in the selected unit.
- Enter Weight: Input your current weight in the selected unit.
- View Results: See your BMI and category classification.
- Seek Help: If your BMI is in the underweight range, consider consulting with a healthcare provider.
Important: If you or someone you know is struggling with an eating disorder, please seek professional help. Contact a healthcare provider, therapist, or eating disorder helpline for support.
Frequently Asked Questions
What BMI is considered anorexic?
While "anorexia" is a clinical diagnosis that involves more than just BMI, BMI below 17 is considered moderately to severely underweight, and BMI below 15 is very severely underweight. However, anorexia nervosa is a mental health condition diagnosed by healthcare professionals, not just by BMI.
Is this calculator accurate for diagnosing anorexia?
No. This calculator only provides BMI information. Anorexia nervosa is a complex mental health condition that requires professional diagnosis. BMI is just one factor, and the condition involves psychological, behavioral, and physical symptoms.
What should I do if my BMI is very low?
If your BMI is below 17, especially below 15, it's important to consult with a healthcare provider. They can assess your overall health, provide appropriate treatment, and help you work toward a healthy weight in a safe manner.
Can someone have a normal BMI and still have an eating disorder?
Yes. Eating disorders, including anorexia, are mental health conditions that can affect people of all body sizes. BMI alone cannot diagnose or rule out an eating disorder. Professional evaluation is necessary.
Expert Reviewed
This calculator was reviewed by NumCalculators Editorial Team, Multi-disciplinary Expert Team