Ideal Weight Calculator

Ideal body weight is an old medical concept, originally used to compute drug dosages and as reference for anesthesia. Throughout the 20th century several doctors proposed formulas based on height and sex. This calculator applies the four most-used: Devine (1974, US hospital standard), Robinson (1983), Miller (1983), and Hamwi (1964, common in diabetes care).

Formulas (all use inches above 5 feet = 152.4 cm):

Devine    M: 50 + 2.3 × in   F: 45.5 + 2.3 × in
Robinson  M: 52 + 1.9 × in   F: 49 + 1.7 × in
Miller    M: 56.2 + 1.41 × in  F: 53.1 + 1.36 × in
Hamwi     M: 48 + 2.7 × in   F: 45.5 + 2.2 × in

Important: these formulas were developed on specific populations (mostly white American adults) and carry bias. They don't account for body composition — an athlete with high muscle mass may weigh much more than "ideal" without any health issue. For body assessment, BMI (Body Mass Index), body fat percentage, and waist-to-hip ratio are the metrics used today.

Where these formulas remain useful: drug dosing based on ideal body weight (especially in obese patients where actual weight would distort), reference for weight-loss targets in healthy adults, and protein needs in nutrition planning. For any significant clinical decision, consult a physician or registered dietitian.