MasterTool

Ideal Weight Calculator

Compare four published ideal body weight formulas — Devine, Robinson, Miller and Hamwi — for your height.

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What this tool does

Compare four published ideal body weight formulas — Devine, Robinson, Miller and Hamwi — for your height. All four formulas are linear height rules from the published literature (Devine 1974 and successors); they disagree by design, so the range across them is shown rather than a single 'ideal'.

How to use the Ideal Weight Calculator

  1. Enter or select height in in.
  2. Enter or select sex.
  3. Read the calculated result; change any measurement to compare alternatives.

Formula

Devine: 50/45.5 kg + 2.3 kg per inch over 5 ft; Robinson: 52/49 + 1.9/1.7; Miller: 56.2/53.1 + 1.41/1.36; Hamwi: 48/45.5 + 2.7/2.2 (male/female base)
height
Height (in, before metric conversion)
sex
Sex

All four formulas are linear height rules from the published literature (Devine 1974 and successors); they disagree by design, so the range across them is shown rather than a single 'ideal'.

Worked example

For ideal weight calculator, the following measurements illustrate the exact method: Height: 69; Sex: male.

Inputs

  • Height69 in
  • SexMale

Result

  • Devine ideal weight155.87 lb
  • Robinson ideal weight152.34 lb
  • Miller ideal weight151.88 lb
  • Hamwi ideal weight159.39 lb
  • Range across formulas151.9 – 159.4 lb

Results explained

Devine ideal weight
Devine ideal weight from the formula above, expressed in lb before metric conversion. All four formulas are linear height rules from the published literature (Devine 1974 and successors); they disagree by design, so the range across them is shown rather than a single 'ideal'.
Robinson ideal weight
Robinson ideal weight from the formula above, expressed in lb before metric conversion. All four formulas are linear height rules from the published literature (Devine 1974 and successors); they disagree by design, so the range across them is shown rather than a single 'ideal'.
Miller ideal weight
Miller ideal weight from the formula above, expressed in lb before metric conversion. All four formulas are linear height rules from the published literature (Devine 1974 and successors); they disagree by design, so the range across them is shown rather than a single 'ideal'.
Hamwi ideal weight
Hamwi ideal weight from the formula above, expressed in lb before metric conversion. All four formulas are linear height rules from the published literature (Devine 1974 and successors); they disagree by design, so the range across them is shown rather than a single 'ideal'.
Range across formulas
Range across formulas from the formula above. All four formulas are linear height rules from the published literature (Devine 1974 and successors); they disagree by design, so the range across them is shown rather than a single 'ideal'.

Frequently asked questions

None is definitive — Devine (1974) is the most widely used, while Robinson, Miller and Hamwi adjust the slope per inch. This tool shows all four so you see the spread instead of false precision.

It starts from 50 kg for men or 45.5 kg for women at 5 feet tall and adds 2.3 kg for every additional inch of height.

Ideal-weight formulas are single height-based values; the healthy weight range (BMI 18.5–24.9) is a band. A formula value near the edge of the band is not automatically better than any weight inside it.

No. They use height and sex only. Frame size, muscle mass, age and health conditions all shift what weight is appropriate for an individual.

Treat it as one historical reference point, not a target to hit precisely. Sustainable habits and clinician guidance matter more than a single formula output.