Cycling Calculators
Physics-based tools built for cyclists who want to understand the numbers behind their performance. No accounts, no ads – just pure cycling science.
FTP Calculator
Calculate your Functional Threshold Power and get personalized training zones using the Coggan, Polarized, or Sweet Spot models. Supports 20-min, 8-min, and ramp test protocols.
Climb Time Calculator
Predict your time on any climb – from local hills to iconic climbs like Alpe d'Huez and Mont Ventoux. Includes VAM calculation and what-if analysis for weight and power changes.
Watts → Speed
Estimates cycling speed from power using aerodynamic drag, rolling resistance, and gradient. Includes wind and position presets for realistic pacing.
Nutrition Calculator
Plan your carbohydrate intake based on the latest sports science from Jeukendrup and the IOC. Tailored recommendations for different ride types – from easy spins to race day fueling.
Critical Power & W′ Calculator
Estimate Critical Power (CP) and W′ from maximal efforts and visualize your power–duration curve. Understand your sustainable power ceiling and finite work capacity for smarter pacing and interval design.
External calculators we recommend
For advanced tire pressure modeling, we recommend the Silca Pro Tire Pressure Calculator.
Looking for training guidance?
Check out our training articles for practical advice on reaching your cycling goals.