Ideal weight calculator
You get each formula side by side; Devine is the one hospitals use most, for example in drug dosing.
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How to use it
- Enter sex and height.
- The result appears straight away and updates as you edit.
- Copy the result, or copy a link that keeps the same values to share it.
How it is calculated
For each inch over 60 (5 ft): Devine men 50 + 2.3, women 45.5 + 2.3. Robinson 52 + 1.9 and 49 + 1.7. Miller 56.2 + 1.41 and 53.1 + 1.36. Hamwi 48 + 2.7 and 45.5 + 2.2 (kg).
Example
Inputs: Sex = Male, Height = 175 cm. Result: Devine (1974): 70.5 kg; Robinson (1983): 68.9 kg; Miller (1983): 68.7 kg.
Limits and caveats
- None of the formulas account for age, frame size or muscle mass.
- Heights under 152.4 cm are not supported, since the formulas start at 5 ft.
Questions about this tool
Which ideal weight formula is most accurate?
None is right for everyone. Devine is the most used in medicine; Robinson and Miller were later refinements.
Why do the formulas give different numbers?
Each was fitted to different data, and they usually differ by a few kilograms.
Is ideal weight the same as healthy weight?
Ideal weight is a single reference number; healthy weight is the wider range given by a BMI of 18.5 to 24.9.