Free Ideal Weight Calculator: Healthy Weight Range Predictor
Calculate your ideal body weight for your height and gender using the clinical Devine and Hamwi formulas. Discover your optimal weight range backed by medical research.
Ideal Weight Calculator
Enter your height and gender to find your clinically-derived ideal weight range.
FORMULA: IBW = 50 + 2.3 × (height in inches − 60)How It Works
Our Ideal Body Weight (IBW) calculator utilizes the Devine Formula and the Hamwi Methodology, which are the clinical standards for determining optimal weight for height in medical scenarios. These formulas calculate a "base weight" for the first 5 feet of height and add a standardized increment for every additional inch. By comparing multiple clinical models, we provide a mathematically sound target for your physical wellness journey.
What You'll Get
This utility provides multiple data points to help you identify your healthiest range:
- Clinically Ideal Weight: The specific numerical target based on the Devine medical formula.
- Healthy Weight Range: A +/- 10% buffer around your ideal weight to account for body variety.
- BMI-Standardized Midpoint: A comparative target based on the "Healthy" BMI of 22.5.
- Imperial & Metric Conversion: Input results in cm, kg, inches, or lbs.
For a broader view of your health categories, use our BMI Calculator or estimate your composition with the Body Fat Estimator.
Accuracy & Limitations
It is important to distinguish between "Ideal Weight" and "Healthy Weight." These formulas were originally designed for drug dosing and medical assessments, not for assessing fitness level. Athletes with high muscle density or individuals with larger bone frames may naturally sit above the calculated "ideal" without any increased health risk. We recommend visiting our BMR Engine to understand your actual energy needs based on your current weight.
Common Questions
The Devine Formula is the most widely used in clinical settings (drug dosing, ICU care) for its consistency across populations. Most modern research, however, supports targeting a BMI of 22–24 as the optimal health range.
No. Men typically have a higher ideal weight than women of the same height due to differences in bone density, muscle mass distribution, and body composition.
Height is the primary variable in all IBW formulas. For every 2.5cm (1 inch) above 5 feet, the Devine formula adds approximately 2.3kg to the ideal weight estimate.
Standard IBW formulas are calibrated for adults over 5 feet. For shorter individuals, the BMI-based method (targeting BMI 22.5) is generally a more reliable estimation.
Not always. Ideal weight is a statistical estimate, while healthy weight is a range. Athletes with high muscle mass might weigh more than the 'ideal' value but still have excellent health markers.
Absolutely. All ideal weight calculations are performed locally in your browser. We never store or access your height, gender, or personal health data.