Body & diet / Weight
Ideal Weight Calculator (Devine, Robinson, Miller, Hamwi)
Find the ideal body weight for your height and sex with the four best-known formulas, Devine, Robinson, Miller, and Hamwi, and compare them with the weight range for a healthy BMI, in kilograms or pounds.
Ideal Weight Calculator (Devine, Robinson, Miller, Hamwi): Each formula starts from a weight at 5 feet and adds a fixed amount per inch: Devine gives men 50 kg plus 2.3 kg per inch. For a man of 5 ft 10 in, the formulas give 70.3 kg (Miller) to 75 kg (Hamwi), and Devine 73 kg. For a woman of 165 cm, they give 56.5 to 59.9 kg, against a healthy BMI range of 50.4 to 67.9 kg. Runs 100% locally in your browser with zero server file uploads.
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| Formula | Ideal weight |
|---|---|
| Devine (1974) | 125.7 lb |
| Robinson (1983) | 126.8 lb |
| Miller (1983) | 132.1 lb |
| Hamwi (1964) | 124.6 lb |
These formulas were made to dose medicines, not to set goals: each gives a base weight for a height of 5 feet and adds a fixed amount for every inch above it. They ignore muscle, frame, and age, and disagree by several kilograms, so treat them as a rough guide alongside the healthy BMI range.
The formulas
Per inch over 5 feet, in kg. Men: Devine 50 + 2.3, Robinson 52 + 1.9, Miller 56.2 + 1.41, Hamwi 48 + 2.7. Women: Devine 45.5 + 2.3, Robinson 49 + 1.7, Miller 53.1 + 1.36, Hamwi 45.5 + 2.2.
Short and tall people
The formulas are least reliable below 5 feet, where they can give very low weights, and for tall or very muscular people. The BMI calculator shows where your current weight falls.
How to use it
- Choose your sex and units.
- Enter your height.
- Compare the four formulas with the healthy BMI range.
Privacy & limitations
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Frequently asked questions
Where do these formulas come from?
Devine published his in 1974 to dose medicines; Robinson and Miller proposed revisions in 1983, and Hamwi's dates from 1964. None was meant as a personal target.
Why do the formulas disagree?
They were fitted to different data and ignore muscle, frame size, and age, so a range is more honest than a single figure.
Should I aim for the ideal weight?
Not necessarily: a weight anywhere in the healthy BMI range, a waist under half your height, and good fitness matter more. Ask a doctor before setting a target.
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