The Ideal Weight Calculator computes ideal body weight (IBW) ranges based on height, gender, and age. The idea of finding the IBW using a formula has been sought after by many experts for a long time. Currently, there persist several popular formulas, and our Ideal Weight Calculator provides their results for side-to-side comparisons.
• Choose your measurement system: Metric Units (Default), US Units, or Other Units.
• Input your Age (2–80), Gender, and Height.
• Inspect comparative outputs across Robinson (1983), Miller (1983), Devine (1974), Hamwi (1964), and the WHO Healthy BMI Range.
Consensus across Robinson, Miller, Devine, and Hamwi clinical equations for men of your height.
Side-by-side comparison of historical clinical formulas alongside WHO standard reference BMI.
| Formula | Ideal Weight |
|---|---|
Robinson (1983) Modification of the Devine formula using updated empirical population surveys. | 72.6 kg (or 160.2 lbs) |
Miller (1983) Derived from statistical weight-for-height tables with moderate slope scaling. | 71.5 kg (or 157.7 lbs) |
Devine (1974) The standard clinical benchmark formula used in hospitals for drug dosage calibration. | 75 kg (or 165.3 lbs) |
Hamwi (1964) The pioneering rule-of-thumb formula originally designed for the American Diabetes Association. | 77.3 kg (or 170.5 lbs) |
Healthy BMI Range WHO standard BMI window: 18.5 - 25.0 kg/m² | 59.9 - 81 kg (or 132.1 - 178.6 lbs) |
Ideal Body Weight formulas were historically designed not for aesthetic or cosmetic goals, but primarily by pharmacologists and clinicians to calculate accurate medication doses (such as theophylline, aminoglycosides, and anesthesia) where adipose fat tissue does not absorb drugs at the same rate as lean tissue.
The most widely cited formula in clinical medical literature. Serves as the foundation for modern creatinine clearance estimations and critical care drug infusions.
Updated the Devine coefficients using large-scale empirical demographic data to provide slightly higher baseline weights for shorter individuals.
Features a gentler slope multiplier (1.41 kg/in for men, 1.36 kg/in for women), producing more moderate ideal weight increments for very tall individuals.
The original rule-of-thumb designed for diabetic meal planning (106 lbs for 5ft + 6 lbs/inch for men; 100 lbs + 5 lbs/inch for women).