How to use this calculator
- Enter current FTP.
- Choose a sustainable race intensity factor.
- Enter expected duration and drivetrain efficiency.
- Use the predicted average power as a pacing reference.
#2762 · Sports & Gaming Tool
Cycling Power Race Prediction Calculator
Use this cycling power race prediction calculator to turn your training inputs into a transparent planning estimate. It shows the main result, the workload or pace values behind it, and supporting figures you can compare across sessions. The calculation runs entirely in your browser and uses only the assumptions displayed on this page.
Calculator
Training inputsFormula
Predicted average power = FTP × intensity factor
Mechanical energy = power × seconds ÷ 1,000
Mechanical energy = power × seconds ÷ 1,000
What the result means
The predicted power is a pacing target implied by your FTP and chosen intensity factor, not a guarantee of finishing time.
Terrain, aerodynamics, wind, drafting, heat, fueling, and fatigue determine speed. Choose an intensity factor you have sustained in similar events.
Example calculation
A 280 W FTP at 0.85 IF predicts 238 W for 120 minutes. That is 1,713.6 kJ of mechanical work and about 231 W at the wheel with 97% drivetrain efficiency.
Tips for better results
- Use a recent threshold or benchmark from a representative test.
- Keep units consistent before comparing sessions.
- Record conditions such as heat, hills, current, or pool length.
- Treat one result as a planning signal, not a verdict.
- Compare trends from similar sessions rather than isolated scores.
Frequently asked questions
Can I use the cycling power race prediction result for every workout?
No. Terrain, aerodynamics, wind, drafting, heat, fueling, and fatigue determine speed. Choose an intensity factor you have sustained in similar events. Use the estimate with your training history, soreness, sleep, and coaching plan.
What should I do if an input is zero?
Use zero only where the field explicitly permits it. Required distances, times, body mass, and threshold values must be greater than zero.
Why can two athletes get different results from similar sessions?
Fitness, technique, environment, fatigue, and the chosen threshold or benchmark can change the estimate even when headline workout numbers look similar.
Does this calculator replace a coach or laboratory test?
No. It is a planning estimate based on the values you enter, not a medical assessment, physiological test, or individualized coaching prescription.
How often should I update my threshold or benchmark?
Update it after a well-executed test or a meaningful change in fitness. Avoid changing it merely to make one workout score look better.
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Intensity assumptions
| Input | Meaning |
|---|---|
| FTP | Current one-hour threshold model |
| Intensity factor | Planned power relative to FTP |
| Efficiency | Share of crank power reaching the wheel |