Power-to-Weight Calculator
Work out your W/kg — the number that matters most when the road tilts up.
Result
Power-to-weight
3.33 W/kg
FTP ÷ body weight
Rough rider level
Solid recreational (Cat 4–5)
What it means
Power-to-weight ratio (W/kg) is your FTP divided by your body weight. On a climb, where you're fighting gravity, W/kg predicts speed far better than raw watts do.
Two riders with the same 250 W FTP but different weights climb at very different speeds. Improving W/kg comes from two levers: raising power through training, and — carefully and healthily — optimising body composition.
Let the app do this for you
Ride & Run Lab calculates all of this automatically from your real rides — plus an AI coach, form & fitness tracking and segments. $5/month.
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