Calculate your ideal body weight range using four established medical formulas - Devine, Robinson, Miller and healthy BMI range.
Originally for drug dosing. Men: 50 + 2.3×(H−60in). Women: 45.5 + 2.3×(H−60in). First widely adopted IBW formula.
Revised Devine. Men: 52 + 1.9×(H−60in). Women: 49 + 1.7×(H−60in). Considered slightly more accurate for shorter heights.
Men: 56.2 + 1.41×(H−60in). Women: 53.1 + 1.36×(H−60in). Tends to give slightly higher values, especially for taller individuals.
Weight corresponding to BMI 18.5–24.9. Preferred by WHO; does not differ by sex. Broadest range of the four.
Ideal body weight (IBW) is a clinically used estimate of the weight at which a person of a given height is likely to experience optimal health outcomes. Unlike BMI, which uses weight and height together, IBW formulas account for height alone and were originally developed for medical dosing purposes - particularly for calculating drug doses and mechanical ventilation settings. The three most widely used formulas are Devine (1974), Robinson (1983), and Miller (1983).
The Devine formula, introduced by Dr B.J. Devine in 1974, was the first standardised IBW formula and remains a reference in pharmacology. The Robinson formula refines Devine's work, while the Miller formula produces slightly lower estimates, particularly for women. All three formulas use height in feet and inches as input, with separate equations for men and women. Results from different formulas are presented as a range rather than a single target, acknowledging that ideal weight is a healthy band, not a single number.
The National Institute of Nutrition (NIN), Hyderabad - under ICMR - has published Indian-specific dietary guidelines noting that Indians tend to have a higher percentage of body fat at lower BMI values than Western populations. AIIMS and other premier medical institutions use IBW routinely in clinical nutrition, anaesthesia dosing, and ICU management. Health insurance policies offered by companies like Star Health and Niva Bupa often reference healthy weight ranges during underwriting. This calculator helps individuals set realistic fitness goals aligned with their height and gender.