Ideal Weight Calculator

This calculator estimates a reference ideal body weight from your height and sex using the Devine and Robinson formulas commonly used in clinical and pharmacy settings.

Worked Example

Sample input: Height (cm): 175, Sex (1 = male, 0 = female): 1

Ideal body weight: 70.5 (Devine formula estimate)

For a male of your height, the Devine formula estimates an ideal body weight of about 70.5 kg (the Robinson formula gives 68.9 kg). These are clinical reference estimates, not strict targets.

Frequently Asked Questions

What is ideal body weight?

Ideal body weight (IBW) is a reference estimate used in medicine, for example to help dose certain medications. It is based on height and sex, not a strict goal weight for everyone.

Which formulas are used?

We show the Devine formula (1974), the most widely used in clinical settings, and the Robinson formula (1983), a refinement. Both estimate weight in kilograms based on inches of height over 5 feet.

Is ideal body weight the same as a healthy weight?

Not exactly. IBW is a single reference number, while a healthy weight is a range. The CDC uses BMI of 18.5 to 24.9 to define a healthy weight range, which accounts for body size better than a single target.

Why does the result not change with my actual weight?

Devine and Robinson formulas depend only on height and sex by design. They estimate a reference weight for your frame, independent of your current weight.

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