Ideal Weight Calculator — evidence-based tool to check your ideal weight. Includes formula, tips, and interpretation guide.
Hamwi (1964): Males: 48 kg + 2.7 kg per inch over 5 ft. Females: 45.5 kg + 2.2 kg per inch over 5 ft. Adjust ±10% for large/small frame.
Devine (1974, used in pharmacology): Males: 50 kg + 2.3 kg per inch over 5 ft. Females: 45.5 kg + 2.3 kg per inch over 5 ft.
Robinson (1983): Males: 52 kg + 1.9 kg per inch over 5 ft. Females: 49 kg + 1.7 kg per inch over 5 ft.
BMI method: Target weight range = height (m)² × 18.5 to height (m)² × 24.9.
Example (5'9" male = 175 cm): Hamwi = 48 + 9×2.7 = 72.3 kg. Devine = 50 + 9×2.3 = 70.7 kg. BMI range = 1.75² × 18.5 to 24.9 = 56.6 to 76.2 kg. The BMI range is the broadest and most permissive; clinical formulas are more specific.