FTP Calculator: Estimate Your Cycling Power
Use this FTP calculator to estimate your functional threshold power based on a 20-minute test. Your FTP is a key metric in cycling, helping you define power zones and structure your training sessions effectively.
Cycling FTP Calculator
20-minute test, estimated FTP, W/kg and power zones
| Zone | % FTP | Power | Use |
|---|---|---|---|
| Run a calculation to display your power zones. | |||
| Marker | Value |
|---|---|
| Run a calculation to display your markers. | |
• Z1: active recovery, cool down.
• Z2: aerobic endurance, base work.
• Z3: tempo, sustained endurance.
• Z4: threshold, durable effort close to FTP.
• Z5 to Z7: VO₂max, anaerobic and neuromuscular work.
Cycling FTP Calculator : Power and Training Zones
- The cycling FTP calculator helps you estimate your Functional Threshold Power (FTP), a key metric for structuring your cycling training. FTP represents the maximum power you can sustain for approximately one hour. It serves as a benchmark for defining your intensity zones and organizing your workouts with precision.
- Based on a 20-minute test, you can obtain a reliable estimate of your FTP by applying a 95% coefficient to the average power output. This calculator instantly provides your FTP in watts, your power-to-weight ratio (W/kg), and your power zones.
- Whether you’re a road cyclist, triathlete, or home trainer user, FTP is an essential benchmark for making effective progress, better managing your efforts, and tailoring your workouts to your goals.
How is FTP calculated based on a 20 minute test ?
- The 20-minute FTP test is a simple and widely used method for estimating your functional threshold power. It involves maintaining a constant, maximum effort for 20 minutes and then calculating the average power output over that period.
- The formula used is as follows: FTP = average power over 20 minutes × 0.95. This coefficient adjusts the 20-minute effort to approximate the power you could sustain for one hour.
- This method offers a good balance between accuracy and ease of use, particularly for cyclists who train alone or on a stationary bike.
Why use power zones in cycling?
Power zones based on FTP allow you to structure your workouts with precision. Each zone corresponds to a specific type of effort:
- Zone 1: Active recovery
- Zone 2: Endurance
- Zone 3: Tempo
- Zone 4: Threshold
- Zone 5: VO₂max
- Zone 6: Anaerobic capacity
- Zone 7: Neuromuscular effort
Working with these zones helps you optimize your workouts, avoid intensity errors, and make progress in a structured way.
Cycling FTP : FAQ
What is a good FTP?
A good FTP depends on your skill level, training habits, and profile. The power-to-weight ratio (W/kg) is often used to compare performance among cyclists.
Is the 20 minute FTP test reliable?
Yes, it is a widely used method. It provides a reliable estimate if the test is performed at maximum intensity and on a regular basis.
How often should you test your FTP?
We recommend retaking the test every 6 to 8 weeks to adjust your training zones based on your progress.
Can you use FTP without a power meter?
FTP is based on power (watts). Without a power meter, it’s best to use other metrics, such as heart rate or how you feel.
Why calculate W/kg?
W/kg allows you to compare performance while taking the cyclist’s weight into account. It is a key metric in cycling, especially when climbing.
FTP is the equivalent of VMA in cycling. For a comprehensive approach to performance, you can also use our tools:
Use these calculators as a starting point, then move on to a more comprehensive analysis of your data and training
to develop a personalized plan that aligns with your goals.