Ideal Weight Formulas
All formulas use height above 5 feet (in inches) as the variable h:
Hamwi (Male): IBW = 48 + 2.7 × h
Hamwi (Female): IBW = 45.5 + 2.2 × h
Devine (Male): IBW = 50 + 2.3 × h
Devine (Female): IBW = 45.5 + 2.3 × h
Robinson (Male): IBW = 52 + 1.9 × h
Robinson (Female): IBW = 49 + 1.7 × h
Miller (Male): IBW = 56.2 + 1.41 × h
Miller (Female): IBW = 53.1 + 1.36 × h
Results in kg; multiply by 2.205 for lbs
Healthy Weight Ranges
These formulas give a single-point estimate. A healthy weight range is typically the ideal weight ±10%. For example, if your ideal weight is 160 lbs, a healthy range would be 144–176 lbs. BMI can also define healthy weight: 18.5–24.9 kg/m² is the standard healthy range.