Ideal Weight Calculator
See what the four classic ideal body weight formulas, Devine, Robinson, Miller and Hamwi, give for your height, and how far apart they land.
The classic ideal body weight formulas disagree with each other. For a man 70 inches tall (5 ft 10 in), they range from 155.0 lb (Miller) to 166.0 lb (Hamwi), with Devine at 160.9 lb and Robinson at 156.5 lb. They are height-only estimates historically used for drug dosing, not a weight anyone should aim for.
These are historical estimates from height and sex alone, shown for information; they are not medical advice, not a diagnosis, and not a weight to aim for. They ignore muscle, frame, age, pregnancy, health conditions and body composition, and they are not written for people under 5 feet. If you have questions about your weight or health, talk with a doctor or registered dietitian.
The equations are written for heights from 5 ft (60 in, 152.4 cm). 5 ft 10 in is 70 inches.
The four equations give
155.0 to 166.0 lb
70.3 to 75.3 kg at 70.0 inches
- Devine (1974)
- 160.9 lb / 73.0 kg
- Robinson (1983)
- 156.5 lb / 71.0 kg
- Miller (1983)
- 155.0 lb / 70.3 kg
- Hamwi (1964)
- 166.0 lb / 75.3 kg
Old drug-dosing formulas that disagree with each other, not a weight to aim for.
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About the Ideal Weight Calculator
"Ideal body weight" equations predict a weight from height alone, as a straight line: a starting weight at 5 feet, plus a fixed amount for every inch above it. They were built for practical jobs such as dosing medicines, not as health targets, and the review credited below sets them side by side. Hamwi's 1964 equations work in pounds; Devine's of 1974 and the 1983 equations of Robinson and of Miller work in kilograms; they come from different decades and are straight lines through height alone, so they disagree. For a man 70 inches tall, Miller gives 155.0 lb, Robinson 156.5 lb, Devine 160.9 lb and Hamwi 166.0 lb, an 11 lb spread from one height. For a woman 64 inches tall the four land between 120.0 and 129.1 lb. None of them knows your age, frame, muscle or body fat, and none is written for heights under 5 feet, so the calculator shows nothing there instead of stretching a line past where it was drawn. Read the spread as a reminder of how rough a height-only formula is.
Frequently asked questions
What is the Devine formula?+
For men, 50.0 kg plus 2.3 kg for each inch over 5 feet; for women, 45.5 kg plus 2.3 kg per inch. At 70 inches the male version gives 73.0 kg, or 160.9 lb.
Why do the formulas give different answers?+
Each dates from a different decade and uses height alone, as a straight line. For a man at 70 inches they span 155.0 to 166.0 lb.
Does this tell me how much I should weigh?+
No. These are dosing formulas based on height alone. They ignore muscle, frame, age and health, and a healthy weight is a range that a clinician can help you think about.
Why does it not work below 5 feet?+
The equations are written as a weight at 5 feet plus an amount per inch above it. Running them below 5 feet would be guessing, so the calculator does not.
Equations as tabulated in Peterson CM et al., "Universal equation for estimating ideal body weight and body weight at any BMI", American Journal of Clinical Nutrition 2016, Table 3 (Hamwi 1964, Devine 1974, Robinson et al. 1983, Miller et al. 1983). Pound: 0.45359237 kg exactly.
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