Ideal Weight Calculator (Devine, Robinson, Miller, Hamwi)
Estimate ideal body weight from height and sex using four classic clinical formulas, plus the healthy BMI weight range. Free, in your browser.
Healthy BMI range: 56.7 kg – 76.3 kg
🔒 Calculated in your browser. Four classic clinical formulas plus the healthy-BMI weight range — estimates for a frame, not a target; healthy weight is a range, not one number.
Four formulas plus a BMI range
Enter your height and sex to see ideal-body-weight estimates from the Devine, Robinson, Miller and Hamwi formulas — the classic equations used in clinical dosing and fitness. Alongside them, the tool shows the healthy weight range for your height at BMI 18.5–24.9.
A range, not a target
These formulas were built for medication dosing and give a single figure per height, but real healthy weight is a range that depends on build, muscle and body composition. Treat the numbers as a rough reference, not a goal. Everything is calculated in your browser.
Frequently asked questions
What is ideal body weight?
A formula-based estimate of a "reference" weight for a given height and sex, originally for medication dosing. It ignores build and muscle, so use the BMI range too.
Which formula should I use?
They give slightly different numbers; Devine is the most widely cited. Seeing all four plus the BMI range gives a realistic range rather than one figure.