What is my ideal weight?

Multiple formulas exist — Devine, Robinson, Miller, Hamwi — and they disagree by 10-20 lbs. For a 5'10" male: 166 lbs (Devine), 160 lbs (Robinson), 163 lbs (Miller). Use body fat percentage instead — "ideal weight" is a range, not a number. 15-20% body fat for men, 20-28% for women is healthy.