Ideal Weight Calculator
See your ideal weight range based on four published scientific formulas and a healthy BMI range.
About ideal weight formulas
The four formulas shown here were developed between the 1960s and 1980s, primarily for use in pharmacology to calculate drug doses based on lean body mass. They were not designed to prescribe aesthetic weight goals.
The Robinson (1983) formula is generally considered the most updated. The Devine formula (1974) is still widely used in clinical settings for medication dosing. The BMI range of 18.5–24.9 from the World Health Organization may be more practically relevant for health outcomes, though BMI doesn't account for muscle mass or body composition.
Use these numbers as context, not targets. Two people at the same height can have different healthy weights based on frame size, muscularity, and genetics.
Ideal weight — FAQ
Not necessarily. Ideal weight formulas represent statistical averages for a given height — they don't account for your individual body composition, frame size, or athletic background. A competitive powerlifter, for example, might be well above the "ideal weight" for their height but have excellent health markers. Focus on body composition (body fat %) and health biomarkers rather than chasing a specific number on the scale.
Each formula was derived from a different study population and era. They agree closely for average heights but diverge at extremes. Rather than picking one "correct" answer, looking at the range across all formulas gives you a practical window. The overlap between formulas and the healthy BMI range is the most meaningful zone to target.