A historical sex-specific height-and-weight rule of thumb. It is not an athlete performance target.
View ReferenceSelected Formula Estimate
72.3kg
Hamwi Formula (1964); a historical height-based reference, not a performance target.
Formula Comparison
Hamwi
72.3 kg
Devine
70.5 kg
These formulas compare historical reference equations. They do not identify an ideal race weight, body-fat target, or safe weight-loss goal. Performance and health cannot be inferred from height alone.
Do not use this calculator to set a weight-loss target. Consult a qualified sports dietitian or physician for body-composition concerns.
Compare the outputs of the historical Hamwi and Devine height-based reference formulas. The results are educational formula estimates—not ideal racing weights, body-composition goals, or weight-loss recommendations.
This tool compares two historical height-based reference formulas. It keeps the popular racing-weight calculator route while making the limitation explicit: neither output is an endurance-performance target or a prescription to lose weight.
Both formulas begin with a sex-specific reference at five feet and add weight for each additional inch. They ignore body composition, frame size, sport, training load, health history, and current performance. The calculator shows both results so the difference is visible rather than hiding the choice.
A lighter number is not automatically a faster or healthier one. Under-fueling can impair recovery, bone health, hormonal function, immunity, mood, and training quality. Body-mass changes should never be inferred from a height-only formula.
If weight or body composition is affecting health or performance, work with a qualified sports dietitian or clinician who can consider the whole athlete.
Searches often call generic height rules a Stillman weight calculator or ask for another author's racing-weight method. This page does not relabel Hamwi or Devine as Stillman, and it does not reproduce a proprietary coaching method. It names the two formulas it actually computes and links to their historical context.
No. It calculates the named Hamwi and Devine formulas. It does not present either output as a Stillman formula or as a performance target.
No. This independent educational comparison does not reproduce or claim to implement another author's proprietary method.
There is no universally correct number from height alone. Performance, health, energy availability, body composition, and the demands of the sport all need individualized assessment.