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Ideal Weight Calculator

See four classic ideal weight formulas at once. Then read why none of them is really the number worth chasing, and what is.

Calculate Your "Ideal Weight"

Please enter a valid height.
FormulaResult
Devine (1974)--
Robinson (1983)--
Miller (1983)--
Hamwi (1964)--
Average--

What This Number Actually Is

Every formula above was invented as a fast clinical shortcut, mostly for estimating medication dosing, between 1964 and 1983. None of them was derived from research into what weight actually produces the best health outcomes for an individual. They were never fitness targets to begin with, and they disagree with each other by design, because four different people built four different shortcuts decades apart, not because one of them is more correct.

The four formulas (height in inches over 5 feet)
Devine: 50kg + 2.3kg/in (men), 45.5kg + 2.3kg/in (women)
Robinson: 52kg + 1.9kg/in (men), 49kg + 1.7kg/in (women)
Miller: 56.2kg + 1.41kg/in (men), 53.1kg + 1.36kg/in (women)
Hamwi: 48kg + 2.7kg/in (men), 45.5kg + 2.2kg/in (women)

None of these formulas can see muscle. A muscular, athletic person will be told they are "overweight" by every single one, and a thin person with a high body fat percentage will be told they are "ideal." That is the real limit here, not a rounding error. Body fat percentage is a far better answer to the question these formulas are actually trying to answer.

The Honest Answer

This tool exists because "ideal weight" is genuinely one of the most searched questions in fitness, and refusing to answer it does not help anyone who is already going to search it somewhere. But the honest answer is that these four numbers are old medication-dosing shortcuts, not a real health target, and they were never meant to describe an individual body. If you want a number that actually reflects what is happening in your body, check your body fat percentage instead. It accounts for muscle, it tracks real change over time, and it is the number every SanoobFit program is actually built around.

Where This Fits in APEX

Inside SanoobFit's APEX system, real body composition, not a weight-for-height formula, is tracked as the Body Composition standard, part of the Stage 1, Foundation, profile and the real basis of every Fat Loss program.

Standard: Body Composition Stage 1: Foundation Program: Fat Loss

Check the Number That Actually Matters

The SanoobFit app builds your real profile around body composition, not a decades-old formula, free to start.

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Frequently asked questions

Why do I get a different number from each ideal weight formula?
Devine, Robinson, Miller and Hamwi were each invented independently, decades apart, originally as quick clinical shortcuts for medication dosing, not as fitness targets derived from health outcome data. Disagreement between them is expected, not an error.
Should I try to hit my ideal weight number exactly?
No. None of these formulas account for muscle mass, so a muscular person will be told they are overweight by every one of them. Body fat percentage is a far better target than a weight-for-height number.
Does ideal weight account for muscle mass?
No, none of the four classic formulas do. Two people at the same height and the same weight can have completely different bodies, and a weight-only formula cannot tell them apart.

Related Reading

This tool gives an old, formula-based estimate for reference only. It is not a diagnosis, not a real health target, and does not replace advice from your own doctor about a healthy weight for you.