Ideal Weight Calculator: Four Formulas Compared
There is no single answer to “what should I weigh?” Different medical formulas have been developed over the decades, each with different assumptions. This calculator shows results from the four most-used methods so you can see the range — most healthy adults fall somewhere in the overlap zone between them.
Ideal Weight Calculator
See your ideal weight range according to four evidence-based formulas.
The Devine formula (1974) was originally created to estimate drug dosing, not set fitness targets. The Hamwi formula, created in 1964, was intended for diabetic patient management. None of these were designed to tell you what you should weigh for personal health goals — they are starting points for clinical reference, not personal targets. Use them as a loose reference, not a destination.