How to Estimate Your Ideal Body Weight
Ideal body weight formulas were originally developed for medical dosing purposes — to calculate drug doses for patients based on their body size rather than total weight, which can be skewed by obesity. The Devine formula (1974) and Robinson formula (1983) are the most widely used. These should be understood as rough guidelines, not prescriptive targets.
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Formula
Ideal Weight Calculator
Estimate your ideal body weight using the Devine and Robinson formulas.
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Worked Example
Given:
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FAQs
Are ideal weight formulas accurate for everyone?
These formulas have significant limitations. They do not account for body composition, muscle mass, bone density, or ethnic differences in body structure. They were developed primarily for clinical drug dosing and should not be used as strict weight targets for the general population.
What is the difference between ideal weight and healthy weight range?
Ideal weight is a single number from a formula, while healthy weight range is derived from the BMI 18.5–24.9 range. The BMI-based healthy weight range is generally more nuanced and reflects a broader acceptable zone rather than a single target weight.
Should I aim to reach my ideal weight?
Focus on overall health markers — blood pressure, blood glucose, cholesterol, energy levels, and fitness — rather than a specific number on the scale. A weight that allows you to be active, healthy, and feel well is more meaningful than hitting a formula's output.