No single “ideal” weight exists — so compare the four widely cited clinical formulas (Devine, Robinson, Miller, Hamwi) side by side, plus the WHO healthy BMI range.
None is definitive — they were developed for drug dosing, not fitness goals. The healthy BMI range (18.5–25 kg/m²) is the more practical guide.
Each uses a different base weight and per-inch increment, and each was fit to different populations decades apart.
No. Muscular individuals can be perfectly healthy above formula weights. Body composition matters more than scale weight.