Ideal Weight Calculator
with Healthy Weight Range by Height

How ideal weight is estimated

“Ideal weight” is usually estimated from height-based formulas rather than measured directly. Several classic formulas, such as Hamwi, Devine, Robinson, and Miller, start from a base value and then adjust upward with height. Because these formulas differ, they often produce slightly different results for the same person.

This calculator shows the individual formula outputs, their average, and a lightly frame-adjusted blended reference value. It also shows the healthy BMI range for the same height so the reference number can be viewed in context rather than in isolation.

Core structure

Why formulas and BMI range differ

Classic ideal-weight formulas aim to produce a single reference estimate. By contrast, the BMI healthy range produces a lower and upper boundary for a given height. That means the formula outputs and the BMI range are related, but they are not built to answer exactly the same question.

For that reason, it is often more useful to look at the formula average together with the healthy BMI range rather than relying on one formula alone. The blended result gives a center-style reference, while the BMI range shows the broader span around it.

Classic formulas shown here

Current weight difference and reference context

If current weight is entered, the calculator shows the difference from the blended reference result. This does not mean that the reference number is the only acceptable outcome. It simply provides a structured comparison point against the formula average and the BMI healthy range.

For many people, the BMI range may be more useful as a broader context, while the blended reference serves as a single anchor point for interpretation.

Frequently Asked Questions