Cycling FTP Power Zone Calculator

How the Cycling FTP Zone Calculator Works

This calculator generates seven power training zones using the Coggan power zone classification system, the most widely used framework in cycling training. Enter your FTP directly or estimate it from a 20-minute test (multiply by 0.95), 8-minute test (multiply by 0.90), or ramp test (75% of peak 1-minute power). Optionally enter your body weight to see your watts per kilogram ratio and rider category classification.

Power-based training has revolutionized cycling because power is an objective, instantaneous measure of how hard you are working. Unlike heart rate, which is influenced by temperature, fatigue, hydration, and caffeine, power output directly measures the work being done. Training with power zones ensures every workout targets the correct physiological system for maximum adaptation.

The Seven Coggan Power Zones

Zone 1 - Active Recovery (below 55% FTP): Very easy spinning for recovery days. Heart rate and breathing are barely elevated. Sessions of 30-90 minutes promote blood flow and recovery without adding training stress.

Zone 2 - Endurance (56-75% FTP): The foundation of cycling fitness. Sustainable for 2-6 hours, this zone builds aerobic base, improves fat metabolism, and increases mitochondrial density. Most long rides should be in Zone 2.

Zone 3 - Tempo (76-90% FTP): Moderate effort sustainable for 1-3 hours. Useful for building muscular endurance and improving the body's ability to utilize lactate. Sometimes called the "no man's land" because it is too hard for easy riding but not hard enough for threshold benefits.

Zone 4 - Threshold (91-105% FTP): At or near your FTP, sustainable for 20-60 minutes. This is the most time-efficient zone for improving your FTP and is the focus of structured training programs.

Zones 5-7 target VO2max (3-8 minute efforts), anaerobic capacity (30 seconds to 3 minutes), and neuromuscular power (under 30 seconds) respectively. These zones are used in structured interval workouts.

Frequently Asked Questions

What is FTP in cycling?

FTP is the highest power you can sustain for approximately one hour, measured in watts. All Coggan power zones are percentages of FTP.

How do I test my FTP?

The most common method is a 20-minute all-out effort, multiplied by 0.95. Other options include the 8-minute test (x0.90) and the ramp test (75% of peak 1-minute power).

What is a good watts per kg?

Recreational riders are 2.0-2.8 W/kg, Cat 3 racers 3.4-4.0, Cat 1/Elite 4.6-5.5, and World Tour pros exceed 5.5 W/kg at threshold.

How often should I retest?

Every 6-8 weeks, or when your zones no longer feel appropriate. Regular retesting ensures training intensity stays optimal.

What zone should most of my riding be in?

Like running, cycling benefits from a polarized approach: about 80% in Zone 1-2 and 20% in Zone 4 and above.