Ideal Weight Calculator
Estimate a healthy target weight from your height with classic formulas.
A reference weight from height
Ideal body weight formulas estimate a reference weight from your height and sex. They were developed for medication dosing and give a ballpark healthy weight rather than an exact ideal.
The Devine and Robinson equations both add a fixed amount of weight for each inch above five feet. For a 178 cm man that lands near 74 kg. Because they ignore muscle and frame, athletic builds will read high — use the number as a guide.
Instant and private
It converts your height and applies both formulas in your browser, so nothing you enter is uploaded.
Frequently Asked Questions
Which formulas are used?
The Devine and Robinson formulas, two widely cited equations based on height and sex. They give a reference range rather than a single perfect number.
Is there one correct weight?
No. These formulas predate modern body-composition science and ignore muscle and frame size, so treat the result as a rough guide, not a target to chase.
Why does height matter most?
Because these formulas scale weight to height above five feet, adding a fixed amount per inch.
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