Ideal Weight vs. BMI Range: Which Should You Actually Use
An ideal weight formula produces a single specific number for a given height, while a BMI-based healthy weight range gives a broader span (commonly the 18.5–24.9 BMI category translated into pounds or kilograms for a given height) — the range is often more practically useful, since it acknowledges that a healthy weight genuinely varies across a span rather than pinpointing one exact number.
Both approaches share the same underlying limitation — neither accounts for body composition — but they present the result differently in a way that matters for how it's actually used.
Why a single number can be misleading
Presenting one specific "ideal" weight implies a precision that isn't really justified given how much individual factors (muscle mass, frame size, overall health) affect what's actually healthy for a specific person — a range better reflects the genuine uncertainty and individual variation involved.
Why a BMI-based range is often more practical
A healthy BMI range translated to pounds or kilograms for a specific height gives a wider, more realistic target band rather than a single number to hit exactly — acknowledging that a healthy weight for a given height reasonably spans a range rather than one precise figure, though it carries the same muscle-mass limitations covered in the BMI guide.
Using both together sensibly
Neither a single ideal weight number nor a BMI range alone captures the full picture — using either as a rough starting reference, combined with a body fat estimate and how someone actually feels and performs, gives a more complete and personally meaningful assessment than relying on any single weight-based figure alone.