Power-to-Weight Calculator
Calculate your cycling W/kg ratio from FTP and body weight. Find your performance category and see how improvements in power or weight affect your ratio.
Use the FTP Calculator if unsure
Power-to-Weight Ratio
Category: Well-trained
Consistent structured training, competitive amateur
W/kg Categories
How to Improve Your W/kg
Raise FTP by 5%
FTP → 263W
3.75
W/kg
Add 20W to FTP
FTP → 270W
3.86
W/kg
Lose 3kg body weight
Weight → 67.0kg
3.73
W/kg
For most cyclists below 3.5 W/kg, raising FTP through structured training yields faster gains than losing weight. Above 4.0 W/kg, weight management becomes increasingly important for climbing performance.
Frequently Asked Questions
What is power-to-weight ratio (W/kg)?
Power-to-weight ratio (W/kg) is your Functional Threshold Power (FTP) divided by your body weight in kilograms. It measures how much power you can sustain relative to your mass. A lighter rider with the same FTP as a heavier rider will go faster uphill because they have a higher W/kg. It's the single most important metric for climbing performance in cycling.
How can I improve my W/kg?
There are two levers: raise your FTP or reduce body weight. Raising FTP requires structured training — intervals at threshold, VO2max blocks, and consistent aerobic base. Reducing body weight requires a caloric deficit while preserving muscle, which takes careful nutrition management. A 5% FTP gain or 5% weight loss both improve W/kg by the same amount — the most effective approach depends on your starting point.
What is a good W/kg for amateur cyclists?
For amateur cyclists: a recreational rider is typically 2.0–3.0 W/kg, a trained club rider is 3.0–3.5 W/kg, a competitive amateur is 3.5–4.5 W/kg. If you can sustain 4.0+ W/kg, you're in the top tier of amateur racing. Most cyclists improve most efficiently below 4.0 W/kg through structured FTP-focused training.
Does weight matter on flat terrain?
On flat ground, aerodynamic drag dominates — heavier riders can often produce more absolute power (higher watts) and go faster. W/kg matters primarily on climbs and in races with significant elevation. For flat time trials, absolute FTP in watts is more relevant than W/kg. The steeper the gradient, the more W/kg determines the outcome.
What W/kg do elite Tour de France cyclists have?
Grand Tour climbers sustain approximately 6.0–6.5 W/kg for 30+ minutes on major climbs. GC contenders at Tour de France peak around 6.0–6.3 W/kg. WorldTour domestiques and sprinters typically range from 5.0–5.5 W/kg. The all-time tested record for a 60-minute effort stands around 6.7 W/kg. These numbers are essentially unachievable without an elite training programme spanning years.
Track your W/kg progress in FlipMP
Connect your power meter and scale. FlipMP automatically calculates your W/kg and tracks how it changes with every training block.
Start tracking W/kg with FlipMP →