About These Formulas
Each formula estimates ideal body weight based on height and gender. They were originally developed for drug dosage calculations, but are now widely used as general health references. All four apply only to adults who are at least 5 feet (152 cm) tall.
Devine Formula (1974)
Created by Dr. B.J. Devine for medication dosing. It became the most commonly referenced ideal weight formula in clinical settings. Male: 50 + 2.3 kg per inch over 5 ft. Female: 45.5 + 2.3 kg per inch over 5 ft.
Robinson Formula (1983)
A modification of the Devine formula by Dr. J.D. Robinson, intended to produce more realistic estimates. Male: 52 + 1.9 kg per inch over 5 ft. Female: 49 + 1.7 kg per inch over 5 ft.
Miller Formula (1983)
Also published in 1983, this formula tends to produce higher base weights. Male: 56.2 + 1.41 kg per inch over 5 ft. Female: 53.1 + 1.36 kg per inch over 5 ft.
Hamwi Formula (1964)
One of the earliest ideal weight formulas, developed by Dr. G.J. Hamwi. It is still widely cited in nutrition and dietetics. Male: 48 + 2.7 kg per inch over 5 ft. Female: 45.5 + 2.2 kg per inch over 5 ft.
These formulas provide general estimates and do not account for body composition, frame size, or individual variation. They work best as a rough guideline. Talk to your doctor for personalized advice.