Ideal Weight Calculator
Height drives most “ideal weight” estimates. We show four classic clinical formulas in kg, a BMI band (18.5–24.9), and an average — then optionally nudge for self-reported frame size.
Inputs
Results
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Blended recommendation (midpoint of formulas × frame)
Devine—
Robinson—
Miller—
Hamwi—
BMI healthy range (18.5–24.9): —
Why more than one formula?
Clinicians once used “ideal body weight” to size drug doses and ventilator settings. Devine (1974), Robinson, Miller, and Hamwi each publish a linear rule based on height above five feet — they agree in the middle but diverge at tall and short extremes. Showing all four highlights uncertainty: there is no single divine number, only a band.
BMI 18.5–24.9 marks a population-level healthy range for many adults; it is not perfect for muscular athletes or older adults with sarcopenia. Better markers include waist circumference, waist-to-hip ratio, and body-fat percentage from DEXA or skilled skinfold testing — when available.
Frame size here is a simple ±7% nudge around the average of formulas — a coarse stand-in for bone breadth, not diagnostic. If your weight and activity feel good and labs are fine, a chart should not override lived experience — but sudden unintended weight change still warrants medical review.
Continue learning with our BMI calculator for category screening and the calorie / TDEE calculator if you are planning structured nutrition changes with professional oversight.
FAQ
Can I see pounds or stone?
Use the unit tabs above the results — kg, lb, or stone + lb (UK). Your choice is remembered on this device.
What about kids?
Pediatric growth charts differ — this page targets adults.