Calculate your power training zones based on FTP (Functional Threshold Power). Use FTP-based watt ranges as one practical method for structuring cycling workouts and tracking fitness.
Last updated: March 2026 | By Software Calculator Team
| Zone | % FTP | Watts (@250W FTP) | Duration |
|---|---|---|---|
| Zone 1 — Active Recovery | 0-55% | 0-138W | 30-60 min |
| Zone 2 — Endurance | 56-75% | 140-188W | 60-180 min |
| Zone 3 — Tempo | 76-90% | 190-225W | 20-40 min |
| Zone 4 — Threshold | 91-105% | 228-263W | 8-20 min |
| Zone 5 — VO2 Max | 106-120% | 265-300W | 3-8 min × repeats |
| Zone 6 — Anaerobic | 121-150% | 303-375W | 30-60 sec × repeats |
Note: FTP values vary by experience level. Average recreational: 150-200W, intermediate: 200-300W, advanced: 300-400W+
Power zones are training intensity ranges based on your Functional Threshold Power (FTP), which is the maximum average power you can sustain for one hour. Unlike heart rate, power is an immediate, objective measurement of your work output, making it a useful tool for structured cycling training.
The six-zone model, popularized by Dr. Andrew Coggan, divides training intensity from active recovery (Zone 1) through endurance, tempo, threshold, VO2 max, to anaerobic capacity (Zone 6). Each zone produces specific physiological adaptations: Zone 2 builds aerobic base, Zone 4 increases lactate threshold, and Zone 5-6 develop peak power and anaerobic capacity.
Power responds quickly to effort changes and can be useful for interval training. Heart rate, perceived exertion, terrain, fatigue, and training goals still provide valuable context alongside power-meter readings.
20-Minute Test: After a thorough warm-up, ride as hard as you can sustain for 20 minutes. Your FTP = 95% of your 20-minute average power.
Ramp Test: Increase power by 20W every minute until failure. Your FTP = 75% of your maximum 1-minute power achieved.
Retest FTP every 6-8 weeks to keep zones accurate as fitness improves.
Input:
Calculated Zones:
This cyclist would spend most training time in Zone 2 (endurance), with targeted intervals in Zones 4-5 for threshold and VO2 max development.
FTP (Functional Threshold Power) is the maximum power you can sustain for ~1 hour. It represents your aerobic ceiling and is the anchor point for all power-based training zones.
Training zones are calculated from your absolute FTP in watts. W/kg is useful for comparing power-to-weight ratios, especially for climbing, but it is not interchangeable with watts.
Retest every 6-8 weeks or after a training block. More frequent testing disrupts training and doesn't allow sufficient time for adaptation. Less frequent testing means training in outdated zones.
No reliable way exists. Estimated FTP from heart rate, speed, or perceived exertion is inaccurate. If training with power matters to you, a power meter is essential.
Polarized training model: 75-80% Zone 1-2, 15-20% Zone 4-6, minimal Zone 3. Base building: 90%+ Zone 1-2. Race prep: increase Zone 4-6 to 25-30%. Adjust based on goals and race demands.
The 6-zone model (Coggan) separates anaerobic capacity (Zone 6) from VO2 max (Zone 5), providing more precise targeting for different training adaptations. Some systems use 5 or 7 zones.
Indoor FTP is typically 3-8% lower due to lack of cooling airflow, different biomechanics on a stationary trainer, and psychological factors. Use separate indoor/outdoor FTP values.
Highly variable by training history and genetics. General benchmarks: Beginner male: 2.0-2.5 W/kg. Trained amateur: 3.5-4.5 W/kg. Competitive racer: 4.5-5.5 W/kg. Elite/Pro: 5.5-7.0+ W/kg.
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