Power-to-Weight Ratio
Calcula W/kg e classificação Coggan (untrained → world class).
W/kg + classe
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Power-to-weight ratio in cycling
The W/kg ratio is the cyclist's FTP (Functional Threshold Power, in watts) divided by body weight in kilograms: W/kg = FTP / weight_kg. A 75 kg rider with FTP of 300 W has 4.0 W/kg. Reference brackets: <2 beginner, 2–3 recreational, 3–4 trained amateur, 4–5 racing category, 5–6 elite amateur, 6+ professional. Tadej Pogacar holds about 6.4 W/kg sustained over 30-minute climbs in the Tour de France.
Applications
Comparing riders of different sizes (heavier riders need more raw watts for the same W/kg), classifying climbs, deciding whether to upgrade racing category, and setting your Zwift level — categories B/C/D are gated by W/kg thresholds. On flat terrain raw watts matter more; on climbs W/kg dominates.
FAQ
How do I measure my FTP? The classic protocol is a 20-minute all-out test; average power × 0.95 is your estimated FTP. Smart trainers and platforms like Zwift, TrainerRoad and Garmin automate this.
Should I lose weight or gain watts? Both raise W/kg, but losing muscle hurts absolute power. Below a certain body fat threshold, gaining watts becomes the only sustainable path.
Is 4 W/kg good? Yes — it puts you in the racing-category amateur bracket, above ~90% of recreational riders.
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