Watts per Kilogram (W/kg)
What is Watts per Kilogram (W/kg)?
Watts per kilogram (W/kg) divides erg power output by the rower's body weight. On the erg, absolute watts determine split time regardless of weight — but W/kg provides a fair comparison across weight categories and is more relevant for on-water rowing where the boat must carry the athlete. Typical 2K test values: recreational 2.0-2.5 W/kg, competitive club 3.0-3.5 W/kg, collegiate 3.5-4.0 W/kg, international 4.0-5.0+ W/kg. W/kg is closely related to the Concept2 weight-adjusted scoring system but is simpler to calculate and understand. Lightweight rowers often have excellent W/kg ratios despite lower absolute watts, which is why lightweight events exist in competitive rowing.
How Watta Uses Watts per Kilogram (W/kg)
Watta calculates W/kg from your average watts and profile weight, providing normalised comparisons on the leaderboard. The Effort Score's Work Output component uses a weight-adjusted formula so that lighter rowers are not penalised for lower absolute watts.
Further Reading
- Concept2 Training Resources — Official training guides and workout plans from Concept2.
- Concept2 RowErg Specifications — Technical specifications and performance monitor details.
- World Rowing — The international governing body for the sport of rowing.
Frequently Asked Questions
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