A 75kg rider with a 260W FTP has 3.47 W/kg. Recreational cyclists: 1.5-2.5 W/kg. Competitive amateurs: 3.0-3.5 W/kg. Elite: 4.0-4.5 W/kg. Professional: 5.0+ W/kg. W/kg can be improved by increasing power (harder, takes months) or decreasing weight (faster via nutrition, but must not sacrifice power). On flat terrain, absolute watts matter more; on climbs, W/kg dominates.