About the FTP Zones
Functional Threshold Power gives cyclists a single number to anchor an entire structured training plan around, similar to how runners use threshold pace. Our Cycling FTP Training Zones Calculator breaks your FTP into the seven power-based training zones widely used across cycling training platforms.
How It Works
The calculator applies a set of percentage bands to your FTP, following the widely adopted Coggan power training model, to define seven zones ranging from active recovery up through short, maximal neuromuscular power efforts.
Formula & Methodology
Physiologist and cycling coach Andrew Coggan developed this seven-zone power model based on how different percentages of functional threshold power stress different energy systems and physiological adaptations, mirroring the concept of heart rate zones but using directly measured power output instead. Power-based zones respond instantly to effort, unlike heart rate, which lags behind actual exertion by tens of seconds, making FTP-based zones especially useful for structuring short, precise intervals where heart rate wouldn't have time to catch up to true effort.
Step-by-Step: Calculating It By Hand
- 1Determine FTP, typically from a 20-minute all-out time trial effort or a structured ramp test.
- 2Multiply FTP by each zone's percentage band to find that zone's power range in watts.
- 3Zone 1 (active recovery) covers efforts below about 55% of FTP; Zones 2 through 6 progress upward through endurance, tempo, threshold, VO2 max, and anaerobic capacity.
- 4Zone 7 (neuromuscular power) covers brief, maximal efforts above roughly 150% of FTP.
Examples
250-watt FTP
A rider with a 250W FTP has a Zone 2 endurance range of about 140-188W and a Zone 4 threshold range of about 228-263W.
Using zones for structured training
That same rider might target Zone 2 for long endurance rides, Zone 4 for threshold intervals, and brief Zone 6-7 efforts for anaerobic and sprint-specific training.
Advantages
- Uses the Coggan model, the standard reference across most cycling training platforms and coaching methodologies
- Power-based zones respond instantly to effort, unlike heart rate-based zones
- Covers the full spectrum from recovery through maximal sprint efforts in seven distinct zones
- Useful for structuring precise, repeatable interval training
Common Mistakes
- Training zones based on an outdated FTP that no longer reflects current fitness
- Using an inaccurate FTP test protocol (not a true maximal effort) that underestimates true threshold power
- Spending disproportionate training time in high-intensity zones without adequate lower-zone endurance work
- Not retesting FTP periodically as fitness changes through a training block
Edge Cases to Watch For
- FTP itself can shift meaningfully with training block, fatigue, and fitness level, so zones calculated from an outdated FTP become progressively less accurate as fitness changes.
- Outdoor factors like wind, terrain, and drafting affect power output independent of actual physiological effort, which is part of why indoor trainer-based FTP testing tends to be more consistent than outdoor testing.
- The 20-minute test protocol (using 95% of the 20-minute average power as estimated FTP) is a practical field estimate, not identical to a true laboratory-measured functional threshold power.
- Different platforms and coaches sometimes use slightly different percentage boundaries for each zone, so a rider following training plans across multiple systems may see minor zone differences even at the same FTP.
Common Use Cases
- Structuring cycling workouts around specific power-based training zones
- Setting precise interval targets for threshold, VO2 max, or anaerobic training
- Tracking fitness progress by retesting FTP periodically
- Planning a balanced training program across the full zone spectrum