Cycling Power Duration Curve Calculator
Calculate sustainable power outputs for different durations based on your FTP and anaerobic capacity
About this calculator
The Cycling Power Duration Curve Calculator helps cyclists determine their sustainable power output across different time intervals, from short sprints to long endurance efforts. By inputting your Functional Threshold Power (FTP) and anaerobic capacity, this tool generates a personalized power curve showing exactly how much wattage you can maintain for durations ranging from 15 seconds to several hours. This data is essential for pacing strategies, training zone development, and race planning, allowing cyclists to optimize their performance and avoid early fatigue during competitions or training sessions.
How to use
Enter your current FTP (Functional Threshold Power) in watts and your anaerobic capacity percentage. Select the time duration you want to analyze, ranging from 15 seconds to 6 hours. The calculator will instantly display your sustainable power output for that specific duration, helping you plan your pacing strategy.
Frequently asked questions
What is FTP and how do I find mine?
FTP is your maximum sustainable power for one hour. Determine it through a 20-minute test, taking 95% of average power, or use a power meter during structured testing protocols.
How accurate are power duration curve predictions?
Predictions are highly accurate for trained cyclists with consistent fitness. Results may vary ±5-10% based on individual physiology, training status, and environmental conditions during actual efforts.
Can I use this for race pacing strategies?
Yes, this calculator is excellent for race pacing. Use the power targets to avoid going out too hard early and maintain optimal power distribution throughout your event duration.