Using the Overweight Calculator
Because height is squared in the formula, a small height-entry error can affect the result. Use centimeters rather than meters in the height field and kilograms rather than pounds for weight. The calculator also shows the weights corresponding to the displayed adult reference endpoints.
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 BMI tell whether extra weight is muscle or fat?
No. BMI uses only height and total weight. It cannot distinguish muscle from fat or show where body fat is distributed. Interpreting the result requires context beyond the category shown on this page.
Guide updated .