Estimate ideal body weight with the Miller formula (1983)—a revision of earlier Devine and Robinson equations that uses slightly different base weights and inch coefficients.
Formula
Height is converted to inches: inches = cm ÷ 2.54. Let h = inches above 5 feet (60 inches).
- Male: IBW (kg) = 56.2 + 1.41 × h
- Female: IBW (kg) = 53.1 + 1.36 × h
Results are rounded to one decimal place. Valid height range is 100–250 cm.
When to use it
Side-by-side comparison with Devine and Robinson on the same height and sex, reviewing updated IBW literature, or exploring how coefficient changes shift estimates for tall versus average stature.
Limitations
Miller shares the same population-average assumptions as other height-only IBW rules: no frame size, body composition, or age adjustment. Estimates may not match BMI healthy ranges or DEXA-derived lean mass. For heights under 5 feet, negative h reduces the result below the base constant.
Example
A 165 cm female: h ≈ 5.0 inches → IBW ≈ 53.1 + 1.36 × 5.0 ≈ 59.9 kg.
Health disclaimer
Ideal weight formulas are educational benchmarks—not diagnoses or treatment targets. Consult a qualified healthcare professional before changing diet, exercise, or medication dosing based on these estimates.