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Comprehensive Weight Assessment Tool

Calculate BMI, Ideal Body Weight (IBW), and weight status in one dashboard. Uses WHO data and Devine formulas to map your weight loss journey.

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Category Health & Nutrition
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About

Weight management is not about a single number. While BMI provides a general categorization, the Ideal Body Weight (IBW) formulas offer a target based on skeletal height conventions used in pharmacology and medicine. This tool aggregates these metrics to provide a "Gap Analysis"—the specific difference between where you are and the statistical ideal.

Devine's formula is the standard for dosage calculations, while Robinson and Miller offer variations that may suit different body types. Knowing the discrepancy between your current weight and these benchmarks helps set realistic, data-driven goals rather than arbitrary wishes.

IBW BMI weight loss health assessment ideal weight

Formulas

The Devine Formula is the primary logic used for the "Gap Analysis" in this tool.

{
Men: 50 + 2.3 × (Hin − 60)Women: 45.5 + 2.3 × (Hin − 60)

Body Mass Index is calculated as:

BMI = WeightkgHeightm2

Reference Data

Formula NameCalculation Basis (Men)Primary Use Case
Devine (1974)50kg + 2.3kg per inch over 5ftMedical Dosing (Standard)
Robinson (1983)52kg + 1.9kg per inch over 5ftRevised for Modern Populations
Miller (1983)56.2kg + 1.41kg per inch over 5ftHigher Base, Lower Slope
Hamwi (1964)48kg + 2.7kg per inch over 5ftStrict/Light Frame
BMI Range18.5 − 24.9 kg/m2WHO Health Standard

Frequently Asked Questions

The Devine formula is the most widely accepted standard in medical fields. However, if you have a particularly small frame, Hamwi might be more realistic. For larger frames, Miller often provides a more attainable target.
Standard IBW formulas do not factor in age. They are strictly height-based. As humans age, muscle mass often decreases and bone density changes, but the 'Ideal' pharmacological weight remains a static constant based on height.
IBW formulas were developed decades ago when populations were generally leaner. They represent a 'statistical ideal' rather than an aesthetic one. A healthy weight is often considered to be within a range of ±10% of the IBW.