Using the Anorexic BMI Calculator
The form uses height and weight to produce the same BMI arithmetic as an adult BMI calculator. The reference category describes that number only. Eating-disorder concerns cannot be resolved by finding a particular BMI, and a result in any category does not rule them in or out.
Worked example
Use the example inputs below to reproduce this result. These are the form's starting values, not recommended targets. Changing your inputs updates your result above; this worked example stays fixed for comparison. Results are rounded for display.
Example inputs
- Weight (kg)
- 70
- Height (cm)
- 175
Example result
- BMI
- 22.857143
- BMI reference category
- Healthy weight
- Weight at BMI 18.5 (kg)
- 56.65625
- Weight at BMI 24.9 (kg)
- 76.25625
Method and assumptions
BMI = kg / m². Adult screening categories only; not for children or pregnancy. BMI cannot diagnose anorexia or any eating disorder, and no underweight target is recommended.
Reference: cdc.gov — method and further reading
Read a screening number in context
BMI relates total body weight to height. It does not record body composition, symptoms, medical history or an individual's circumstances. A category can help describe the number consistently, but it should not stand in for a broader assessment. Use the reference as an explanation of the calculation rather than a personal instruction to change weight.
Common question
Can this calculator diagnose anorexia?
No. Anorexia and other eating disorders require an appropriate clinical assessment. A height-and-weight calculation does not assess eating behaviors, psychological symptoms or the other information needed for diagnosis. Seeking support does not depend on reaching a particular BMI.
Guide updated .