No. Ideal weight is a range, not a single number. Different medical formulas produce different estimates, and all of them have limitations. Factors like muscle mass, bone density, age, and body fat distribution are not captured by height-based formulas. The results from this calculator should be used as a general guideline, not a precise target.

Each formula was developed for a different medical purpose and population. The Devine formula was designed for medication dosing, not fitness. The BMI method is based on population-level statistics. No single formula is universally “correct” — together they give you a useful range of reference points. Most health professionals use BMI as the primary reference.

Body frame size (small, medium, large) refers to your skeletal structure — specifically your bone size and width. People with larger frames naturally carry more weight at the same height. Frame size is typically estimated by measuring wrist circumference relative to height. The frame option in this calculator adjusts the formula results by approximately ±10% accordingly.

Height-weight formulas are designed for average body compositions and do not account for unusually high muscle mass. A bodybuilder or professional athlete may weigh significantly more than the “ideal” range shown here while being in excellent health. For athletes, body fat percentage measured by DEXA scan or hydrostatic weighing is a more meaningful metric than weight alone.

No. All the formulas used in this calculator are designed for adults. For children and teenagers, ideal weight is assessed using age- and sex-specific growth percentile charts. Consult your child’s pediatrician for healthy weight guidance for anyone under 18 years of age.