Ideal Weight Calculator
Compare four height-based reference-weight formulas in kilograms and pounds. The page shows their differences rather than choosing a single personal target.
Calculator arithmetic runs locally in your browser and does not require an API.
The interactive calculator loads here when JavaScript is enabled.
How to use Ideal Weight Calculator
Select equation parameters and enter a height of at least five feet (152.4 cm). Re-enter height after changing units; the fields do not convert existing numbers. These formulas are not extrapolated below their five-foot baseline, and no frame-size adjustment is included.
Formula and method
Let X = height in inches − 60. Male/female formulas: Devine (kg) = 50+2.3X / 45.5+2.3X; Robinson (kg) = 52+1.9X / 49+1.7X; Miller (kg) = 56.2+1.41X / 53.1+1.36X; Hamwi (lb) = 106+6X / 100+5X.
Understanding the results
The displayed range spans the four formula outputs; it is not a recommended weight interval. Different starting values and per-inch increments give different estimates. There is no universal ideal weight defined by these equations alone.
Worked example
At 5 ft 10 in using male parameters, X = 10. Devine gives 73 kg, Robinson 71 kg, Miller 70.3 kg and Hamwi 166 lb (about 75.30 kg).
Results are estimates for general information, not a diagnosis or a substitute for professional medical advice.
References
Frequently asked questions
Why do the formulas disagree?
They use different baseline weights and increments per inch; the page retains each result separately.
Is the reference range a weight-loss target?
No. It only summarizes the formula outputs and does not assess your individual needs.
Can I enter a height below five feet?
No. This implementation avoids extrapolating these formulas below their baseline.