Free calculators and simulators for data-driven cycling training.
Calculate Functional Threshold Power from 20-minute test, ramp test or direct input. Training zones auto-generated.
Calculate FTP →Calculate your W/kg, find your cycling category, estimate climbing speeds and analyze weight goals.
Calculate W/kg →Calculate Training Stress Score — with a power meter or by estimating intensity. Includes recovery guide.
Calculate TSS →Simulate fitness build (CTL) over weeks. Visualize training phases and season preparation with real numbers.
Simulate CTL →FTP, CTL, ATL, TSB from your Strava activities — updated daily, no manual calculation needed.
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