Ideal Weight Calculator
Find out your ideal body weight based on your height and gender, and see how it compares across several well-known medical formulas.
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These formulas estimate a healthy target weight based only on your height and gender. They don’t account for muscle mass, frame size, or body composition, so treat this as a general guide rather than a strict target.
How Ideal Weight Is Calculated
Ideal body weight is an estimate of a healthy weight for your height, originally developed for medical dosage calculations and later adopted as a general fitness reference. This calculator offers four well-established formulas.
All four formulas use height and gender as the base inputs, with weight added per inch above five feet. The Devine formula, originally created for drug dosing, is now the most widely referenced version in clinical and fitness contexts.
Frequently Asked Questions
What exactly does ideal weight measure?
Ideal weight is an estimate of a healthy target body weight based purely on your height and gender. It was originally designed for medical purposes like drug dosing, and is now commonly used as a general fitness reference point.
Why do the formulas give different results?
Each formula was developed by different researchers using different population data and assumptions, so their weight-per-inch factors vary slightly. None of them is universally “correct” — they’re all reasonable approximations.
Should I try to hit my ideal weight exactly?
No — these formulas don’t account for muscle mass, bone density, or body frame, so a muscular or large-framed person may naturally weigh more than the number shown. Use the healthy BMI range alongside it for a broader picture.
Which formula should I use?
The Devine formula is generally recommended, as it’s the most widely referenced in clinical practice today. We include Robinson, Miller, and Hamwi as alternatives, since some people prefer to compare across formulas.