Devine Formula Robinson Formula Miller Formula

Ideal Weight Calculator

Reference body weight from the Devine and Robinson formulas.

Use this free ideal weight calculator to estimate a healthy reference body weight from your height and sex. This healthy weight calculator compares the Devine, Robinson, and Miller formulas side by side so you see a clear range, not a single number.

Sex

Units

Height

Ideal body weight formulas use only height and sex. They were designed as clinical references, not personal weight goals.

Average estimate —

Devine (1974) —

Robinson (1983) —

Miller (1983) —

This calculator provides estimates based on published formulas and methodologies. Results are for educational and informational purposes only and should not be considered medical advice.

Understanding your result

Ideal body weight formulas estimate a reference weight for a given height and sex. They were originally developed for medical dosing, not as personal weight goals.

Because each formula was derived from different data, they produce slightly different numbers. Showing them side by side makes the range clear rather than implying a single 'correct' weight.

These formulas depend only on height and sex. They do not account for frame size, muscle mass or body composition, so they are best read as a rough reference band.

Methodology

We compute three established formulas — Devine (1974), Robinson (1983) and Miller (1983) — each based on a base weight at 5 feet (60 inches) plus an increment per inch above that height.

Height is converted to inches internally; the increment per inch differs by formula and sex.

An average of the three formulas is shown to summarise the range, not to suggest a target.

The formula

Each formula adds a per-inch increment above 5 feet to a base weight.

Devine — men: 50.0 + 2.3 × (in − 60) kg · women: 45.5 + 2.3 × (in − 60) kg

Robinson — men: 52.0 + 1.9 × (in − 60) kg · women: 49.0 + 1.7 × (in − 60) kg

Miller — men: 56.2 + 1.41 × (in − 60) kg · women: 53.1 + 1.36 × (in − 60) kg

'in' is height in inches; the term (in − 60) is the number of inches above 5 feet.

References

Frequently asked questions

What is 'ideal body weight' really?

It is a reference value calculated from height and sex, originally created to standardise medication dosing in clinical settings. It is not a personalised health or aesthetic target.

Why do the formulas give different results?

Each formula was derived from a different dataset and era, so the base weights and per-inch increments differ. The spread between them reflects genuine uncertainty in the concept itself.

Should I use this as a weight goal?

No. These formulas ignore muscle, frame size and body composition. For a personal goal, a healthy BMI range and a conversation with a healthcare professional are more appropriate.

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