Compare four classic ideal-weight formulas alongside the WHO healthy BMI range.
Each formula is sex-specific and based on inches above 5 ft. There is no single “correct” ideal weight — treat the four-formula average and the WHO healthy BMI range as the realistic envelope.
Estimate your ideal body weight using the Devine, Robinson, Miller and Hamwi formulas, plus the WHO healthy BMI range for your height. Switch between metric and imperial freely.
There's no consensus. Devine (1974) was originally designed for medication dosing and is the most widely cited. Robinson and Miller (both 1983) tweak Devine's slope; Hamwi (1964) is older and tends to read higher. The four-formula average is a robust general number.
All take the form: base + slope × (height − 60 in). Devine: 50 + 2.3×Δin (men), 45.5 + 2.3×Δin (women). Robinson: 52 + 1.9×Δin / 49 + 1.7×Δin. Miller: 56.2 + 1.41×Δin / 53.1 + 1.36×Δin. Hamwi: 48 + 2.7×Δin / 45.5 + 2.2×Δin.
They were derived from different study populations decades apart, with different goals (drug dosing, life-insurance tables, clinical research). Modern body-composition science treats 'ideal weight' as a range, not a number.
Use both. The formula number is a single target; the BMI range gives you the healthy band. If your activity level or muscle mass is high, the upper end of the BMI range may suit you better than a low formula reading.
They were derived for adults of average build. They're less reliable for very muscular people, very tall or very short people, pregnant women and children. Treat the result as guidance, not a prescription.
Find your Body Mass Index in seconds — with the healthy weight range for your height.
Estimate body-fat % from a tape measure — the U.S. Navy method, in metric or imperial.
Find your Basal Metabolic Rate and daily calorie targets to maintain, lose or gain weight.