Adults only. These formulas are designed for adults only. They are not appropriate for children, adolescents, or pregnant individuals.
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These formulas are based on population averages. Body composition, muscle mass, and frame size are not accounted for. Use these as general guidelines only, and consult a healthcare professional before making changes to your diet or exercise routine.
About Ideal Weight Calculations
The Ideal Weight Calculator compares four well-known formulas side-by-side: Devine (1974), Robinson (1983), Miller (1983), and Hamwi (1964). Each was developed for different medical purposes, so they produce slightly different results. No single formula is universally correct — they provide useful reference ranges rather than exact targets.
The Four Formulas Explained
Devine: Developed for medication dosing in clinical settings; most commonly used in medicine
Robinson: A revision of the Devine formula based on actuarial data; tends to give slightly lower values
Miller: Based on insurance data; tends to give the lowest ideal weight of the four formulas
Hamwi: A simple rule-of-thumb formula widely taught in nursing; uses a base weight plus a per-inch increment
Limitations of Ideal Weight
These formulas were derived from population studies and don't account for body composition. A person with a high muscle mass might be above the "ideal weight" range but have excellent health markers. BMI, body fat percentage, and waist-to-height ratio together give a more complete picture than any single number.