A familiar situation
Review a very low adult BMI screening value without using BMI to diagnose an eating disorder.
How to use this calculator
- Enter weight, height.
- Select Calculate to see the answer and its breakdown.
- Keep a scenario, change an input and compare the results.
Use consistent units and check the assumptions below before applying the result.
How anorexic bmi is calculated
BMI=weight(kg)/height(m)². Adult BMI under 16 is a very low screening value; eating-disorder diagnosis depends on clinical assessment, not a BMI threshold alone. At 45 kg and 1.70 m, BMI is 15.6, a result that warrants careful medical context rather than self-diagnosis.
BMI=weight(kg)/height(m)²; BMI alone cannot diagnose an eating disorder.At 45 kg and 1.70 m, BMI is 15.6, a result that warrants careful medical context rather than self-diagnosis.
Assumptions & useful context
BMI cannot diagnose anorexia or any eating disorder.
Health calculations are estimates for education. They cannot diagnose a condition or replace a clinician’s assessment. Individual needs vary, especially during pregnancy, illness and growth.
Frequently asked questions
Does a low BMI prove anorexia nervosa?
No. An eating disorder can occur at many body sizes and requires professional assessment.
What should I do if the number worries me?
Contact a qualified healthcare professional; urgent symptoms need urgent care.