What this calculator measures
There is no single 'ideal' body weight — the concept depends on your muscle mass, training goals, health history, and age. This calculator presents two reference ranges: the healthy-BMI weight band (the weight range corresponding to BMI 18.5–24.9 for your height) and the Devine formula, a clinical dosing reference that is often misrepresented as a target weight.
How this calculator works
The healthy-BMI weight range is calculated directly from BMI = weight (kg) / height (m)² rearranged for the 18.5–24.9 bounds. The Devine formula (Devine, 1974) was originally developed for estimating ideal body weight for drug dosing in clinical settings — not as a fitness target — and tends to underestimate for people with significant muscle mass.
How to use your result
Use the healthy-BMI range as a general screening reference, not a number to pursue precisely. If you are muscular or athletic, the lower end of this range may be inappropriate. For performance-oriented goals, body fat percentage and strength metrics are more useful targets than any weight formula.
Important limitation
Calculator results are estimates. Pregnancy, eating disorders, medical conditions, injuries, or concerning symptoms require qualified professional guidance.