Cycling Power Zones Calculator
Enter your Functional Threshold Power (FTP) or a recent test result and this calculator instantly shows all seven Coggan training zones with exact watt ranges for each. It also shows your power-to-weight ratio and training guidance for every zone. Choose the test protocol that matches how you measured your fitness and the result scales automatically.
What are cycling power zones?
Cycling power zones divide the full intensity spectrum from easy spinning to an all-out sprint into seven distinct bands, each targeting a different physiological system. Because power meters measure output in real time, training with zones gives you objective, repeatable targets that heart rate alone cannot match. When you ride in Zone 2 you are building your aerobic base; when you ride in Zone 4 you are specifically targeting the adaptations that raise your FTP. The system was formalized by sports scientist Andrew Coggan and coaching consultant Hunter Allen and is now the global standard used by TrainingPeaks, Zwift, Garmin, and most professional cycling coaches.
How to find your FTP
Functional Threshold Power is the highest average power you can sustain for roughly one hour. There are four common ways to estimate it: (1) the 20-minute test, where you ride all-out for 20 minutes and multiply average power by 0.95 to account for the effort you could not have sustained for a full hour; (2) the 8-minute test, two 8-minute efforts averaged and multiplied by 0.90; (3) the 60-minute time trial, where average power equals FTP directly; and (4) the ramp test, a stepped incremental effort where your peak 1-minute power is multiplied by 0.75. Each method has tradeoffs: the 20-minute test is most widely validated, the ramp test is shorter and less daunting for beginners, and the 60-minute race is the gold standard but hardest to perform as a solo effort.
How to use your power zones in training
Effective training follows a polarized or pyramidal distribution. The majority of volume (roughly 70 to 80 percent) goes into Zones 1 and 2 to build an aerobic base and manage cumulative fatigue. A smaller proportion targets Zone 3 to 4 for sustained threshold work, and a small but high-quality block goes into Zones 5 to 7 for VO2 Max and sprint development. A common mistake is spending too much time in Zone 3 (sometimes called the "grey zone"): intense enough to cause fatigue but not intense enough to drive the sharpest adaptations. Keeping easy days genuinely easy and hard days properly hard produces faster improvement.
Power-to-weight ratio and what it means
Power-to-weight ratio (W/kg) divides your FTP by your body mass in kilograms. It is the defining performance metric for climbing because a lighter rider can sustain more watts per kilogram than a heavier one on a steep gradient even if the heavier rider produces more raw watts. As a rough guide: below 2.0 W/kg is beginner territory; 2.5 to 3.5 W/kg is a typical recreational cyclist; 3.5 to 4.5 W/kg describes a competitive club or Cat 4-3 racer; 4.5 to 5.5 W/kg is national- or elite-amateur level; and above 5.5 W/kg marks professional grand-tour contenders. These figures vary somewhat by age, sex, and specialization.
Coggan 7-Zone power system
| Zone | Name | % of FTP | Typical duration | Primary adaptation |
|---|---|---|---|---|
| 1 | Active Recovery | < 55% | 30-90 min | Recovery, blood flow |
| 2 | Endurance | 56-75% | 1-6 hours | Aerobic base, fat oxidation |
| 3 | Tempo | 76-90% | 20-60 min | Sustained aerobic power |
| 4 | Lactate Threshold | 91-105% | 10-30 min | Raise FTP |
| 5 | VO2 Max | 106-120% | 3-8 min | Maximal aerobic power |
| 6 | Anaerobic Capacity | 121-150% | 30 sec - 2 min | Short power, glycolytic |
| 7 | Neuromuscular | > 150% | < 15 sec | Peak sprint, muscle recruitment |
Based on Andrew Coggan and Hunter Allen's widely adopted training zones, referenced by TrainingPeaks and most power-meter coaching platforms.
Frequently asked questions
What is FTP and why does it matter?
Functional Threshold Power (FTP) is the average power you could sustain in a maximal effort for approximately one hour. It is the anchor point for all seven training zones because each zone is defined as a percentage of FTP. A higher FTP means faster speeds at every zone boundary, which directly translates to better race and sportive performance.
Which FTP test is most accurate?
The 60-minute time trial gives the truest FTP because you are literally riding at FTP for the full duration. However, it is very demanding to pace correctly as a solo effort. Most athletes use the 20-minute test multiplied by 0.95 as the best practical compromise between accuracy and effort. The ramp test is excellent for beginners because its short, step-based format is mentally easier and still produces a reasonable estimate.
How often should I retest my FTP?
Every 8 to 12 weeks is a common guideline, although you may want to test after completing a structured training block or after a significant increase in volume or intensity. Testing too frequently (every 2 to 4 weeks) is fatiguing and rarely shows meaningful change; waiting too long means your zones go stale and training stimuli become either too easy or too hard.
Why are there different zone systems (5 zones vs 7 zones)?
Several zone models exist. The 5-zone model used by British Cycling and many coaches is simpler and easier to remember. The 7-zone Coggan model adds finer distinctions at the bottom (active recovery vs endurance) and top (anaerobic vs neuromuscular) of the range. Both models are valid; the important thing is consistency, always train and track using the same system so your data is comparable over time. This calculator uses the 7-zone Coggan model because it is the one adopted by most power-meter software platforms.
Can I use these zones on a turbo trainer or smart trainer?
Yes. Smart trainers controlled by apps like Zwift, TrainerRoad, or RGT can hold you precisely at a target wattage using ERG mode. Enter your zones as custom power targets in the app or simply reference the ranges shown here while riding. The zones apply equally to outdoor riding with a power meter and indoor structured sessions.
What is a good W/kg ratio for cycling?
A power-to-weight ratio below 2.0 W/kg is typical for someone new to structured training. Recreational cyclists who ride regularly often sit between 2.5 and 3.5 W/kg. Competitive club racers and sportive riders tend to range from 3.5 to 4.5 W/kg. National-level amateur and elite riders reach 4.5 to 5.5 W/kg, and professional grand-tour contenders typically exceed 5.5 W/kg during their peak climbing performances. W/kg improves by raising FTP, reducing body weight, or both.