Which ideal weight formula is the most accurate?

The Devine formula is the most widely used clinical standard in pharmacological dosing. Robinson and Miller are slight refinements, while Hamwi is an older standard. Looking at all four together gives a balanced range.

Does age affect ideal weight?

These formulas do not explicitly include age. Instead, they represent healthy physiological benchmarks for adults based on height.

What is the healthy BMI-based ideal weight range?

A body mass index between 18.5 and 24.9 is considered healthy. This equates to a wide, flexible weight range tailored specifically to height.

Health Tool

Ideal Weight Calculator

Calculate your ideal body weight range based on standard clinical equations (Devine, Robinson, Miller, and Hamwi) and healthy BMI parameters.

Interactive Ideal Weight Calculator Workspace

Live Solver

Your Vertical Height (cm)

Clinical Ideal Weight Comparisons

Devine (1974)70.5 kgStandard clinical dose

Robinson (1983)68.9 kgStandard revision

Miller (1983)68.7 kgHigh weight variance

Hamwi (1964)72.0 kgHistorical formula

WHO Healthy BMI Weight Band (BMI 18.5 - 24.9)56.7 kg to 76.3 kg

This represents the optimal health weight buffer tailored specifically to your height.

Mathematical Formula & Variables

Equation ModelIdeal Weight (Devine Male) = 50.0 + 2.3 kg per inch over 5 feet

Medical formulas estimate ideal weight by assigning a baseline weight for 5 feet of height and adding increments for each additional inch.

Variable Definitions

Symbol	Description
Devine Male Base	50.0 kg for 5 feet (60 inches)
Devine Female Base	45.5 kg for 5 feet (60 inches)
Increment	2.3 kg (5.07 lbs) for each inch above 60 inches

How to Use the Ideal Weight Calculator

Select biological sex.
Input height (either in metric or feet/inches).
Click calculate to compare estimates across the four major clinical formulas alongside healthy WHO BMI ranges.

Practical Example Calculation

Scenario Context: Calculating ideal weight for a male standing 6 feet 0 inches tall (72 inches).

Step 1: Calculate inches above 5 feet (60 inches): 72 - 60 = 12 inches.

Step 2: Multiply additional inches by 2.3 kg: 12 * 2.3 = 27.6 kg.

Step 3: Add male base (50.0 kg): 50.0 + 27.6 = 77.6 kg.

The ideal weight by Devine formula is 77.6 kg (171 lbs).

Frequently Asked Questions

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