Ideal Weight Calculator

There's no single “ideal” weight, but several long-standing clinical formulas estimate a healthy weight from your height and sex. This calculator runs four of the best-known — Robinson, Miller, Devine and Hamwi — and shows the range they produce along with an average, so you get a realistic band rather than a false-precision single number.

All four are based on height: each adds a set amount of weight per inch above five feet, with slightly different constants. Because they were derived decades ago for medication dosing and population health, they don't account for muscle mass, age or body composition — a muscular athlete may sit “above” their ideal weight while being perfectly healthy. The frame-size option nudges the estimate to reflect smaller or larger builds.

For context, the calculator also shows the healthy weight range from BMI. Treat all of these as guides, not goals.