Ideal Weight Calculator

Finding Your Healthy Weight: Evidence-Based Recommendations

Ideal weight is highly individual, influenced by height, frame size, muscle mass, age, and genetics. Our calculator uses four scientifically-validated formulas (Hamwi, Devine, Robinson, Miller) developed through population studies, then averages results and applies personalized adjustments for frame size and age to provide realistic, individualized recommendations rather than one-size-fits-all targets.

These formulas were developed for medical use in determining medication dosages and assessing health risks. While originally created decades ago, they remain clinically relevant and widely used. Each formula has slight variations in calculations, which is why we average all four—this approach provides more robust recommendations than relying on a single formula that might over or underestimate for your specific body type.

Beyond the Numbers

Healthy weight is a range, not a specific number. Our calculator provides both formula-based ideal weight and BMI-based healthy range (18.5-24.9 BMI). Where you fall within this range depends on muscle mass, training status, and genetics. Muscular individuals might healthily exceed "ideal" weight. Frame size significantly affects healthy weight— someone with large frame and broad shoulders naturally weighs more than someone with small frame at the same height.

Don't chase a number at the expense of health. Weight is less important than body composition, fitness level, metabolic health markers (blood pressure, glucose, cholesterol), and how you feel. Some people thrive at the high end of healthy range; others feel best at the lower end. Use this calculator as a starting point for discussion with healthcare providers, not as a rigid target. Focus on sustainable healthy habits rather than achieving a specific scale number.