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Ideal Body Weight Calculator

Get your ideal body weight using four validated clinical formulas โ€” Devine, Robinson, Miller, and Hamwi โ€” side by side, plus a BMI-based healthy weight range for cross-reference. Metric or imperial units.

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About these formulas: Devine, Robinson, Miller, and Hamwi are all decades-old clinical formulas originally developed for medical dosing calculations, not personal fitness goals. All four are shown here, since no single one is universally "correct" โ€” they typically cluster within a few kilograms of each other for most adult heights.

How to Use This Calculator

Choose your units, select your biological sex, and enter your height โ€” your ideal body weight from all four formulas, their average, and a BMI-based cross-reference range update instantly. For the full explanation of where each formula comes from and how they differ, see the "How to Use the Ideal Body Weight Calculator" section of our complete guide.

Read the full guide first for the best context: the history and clinical origin of each formula, why they were built for medical dosing rather than fitness goals, how to interpret a "range" rather than a single target number, and a detailed worked example for every calculation on this page are all covered in our Ideal Body Weight Calculator Guide 2026 โ†’

This calculator provides general estimates for informational and educational purposes only. It is not medical advice and does not diagnose any medical condition. These formulas are population-average estimates originally developed for medical dosing calculations and do not account for muscle mass, frame size, or individual body composition. Always consult a doctor or registered dietitian before setting a personal weight target.