Ideal Weight Calculator: Devine, Robinson, Miller & Hamwi Formulas

Ideal Weight Calculator

Calculate your healthy ideal body weight based on scientific clinical equations. Compare estimates from the Devine, Robinson, Miller, and Hamwi formulas alongside the World Health Organization (WHO) healthy weight range.

Formula Consensus Average

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Consensus range across classical clinical formulas: 0 – 0 kg

Comparison of Clinical Equations

Devine (1974)

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Most common medical standard; frequently used for pharmaceutical drug dosing.

Robinson (1983)

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Refinement of Devine's equation using updated empirical population metrics.

Miller (1983)

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Modified baseline that tends to produce slightly higher target estimates.

Hamwi (1964)

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Classic clinical rule of thumb originated for diabetic dietary planning.

Summary Reference Breakdown

Methodology	Base Formula (over 5 feet)	Estimated Target
Devine	50 kg + 2.3 kg/inch	0.0 kg
Robinson	52 kg + 1.9 kg/inch	0.0 kg
Miller	56.2 kg + 1.41 kg/inch	0.0 kg
Hamwi	48 kg + 2.7 kg/inch	0.0 kg

World Health Organization (WHO) Healthy Weight Range

The weight window where your Body Mass Index (BMI) remains between 18.5 and 24.9.

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How Ideal Body Weight is Estimated

Clinical ideal body weight (IBW) formulas were originally developed by medical researchers and pharmacologists to calculate safe drug dosages and renal clearance. Each equation uses a baseline weight for an adult of 5 feet (60 inches) tall and adds a linear multiplier for each additional inch:

Devine Formula (1974): The standard equation utilized in global clinical medicine and pharmacokinetic dosing.
Robinson Formula (1983): A revised iteration of the Devine formula using updated empirical demographic data.
Miller Formula (1983): Developed as an alternative model using a higher base with a lower per-inch increment.
Hamwi Formula (1964): A practical rule of thumb originally published for diabetic and nutritional counseling.