What is FTP and how is it measured?

Functional Threshold Power (FTP) is the highest average power a cyclist can sustain for approximately one hour. It is commonly estimated by multiplying the average power from a 20-minute maximal test by 0.95, or determined via ramp protocols on calibrated power meters and smart trainers.

Why does the calculator display Zone 3 (Tempo) as the primary result?

The implementation highlights Zone 3 (75–90% FTP) as the primary output because tempo efforts occupy a central role in many base-building and threshold-adjacent training blocks. All seven zones remain visible in the secondary details for complete reference.

How often should FTP be retested?

Fitness adaptations typically warrant retesting every four to six weeks during structured training phases. More frequent tests may be appropriate during rapid fitness gains or following illness, injury, or extended breaks from cycling.

Can these zones be used for outdoor rides with variable terrain?

The percentage-based zones reflect steady-state efforts most easily maintained on flat roads or controlled indoor environments. Variable terrain, wind, and drafting introduce power fluctuations that may cause instantaneous wattage to spike above or dip below zone boundaries even when average intensity remains within the target range.

Do the Coggan zones apply equally to all cyclists?

The seven-zone framework is widely adopted, but individual lactate and ventilatory thresholds can shift the subjective intensity experienced at a given percentage of FTP. Riders with atypical profiles—such as those with unusually high or low anaerobic capacity—may benefit from laboratory-verified personalized zones.

Cycling

Cycling Power Zones Calculator

Calculate Coggan seven-zone power training ranges from your Functional Threshold Power (FTP).

Last updated: 22 April 2026

What this tool does

This calculator divides your Functional Threshold Power (FTP) into seven training zones using the Coggan power-based training model developed by Dr. Andrew Coggan and detailed in Training and Racing with a Power Meter. It takes a single input—your FTP in watts—and outputs power ranges for Active Recovery (Z1), Endurance (Z2), Tempo (Z3), Threshold (Z4), VO2max (Z5), Anaerobic Capacity (Z6), and Neuromuscular Power (Z7) by applying fixed percentage boundaries to your FTP. The resulting zones are population-standard ranges intended for structured cycling training; individual responses to intensity may vary based on fitness level and physiology.

Inputs

Result

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Formula Used

Z_{i} = pct_{i} \times FTP, i \in {1, \dots, 7}

FTP

Functional threshold power in watts

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How Cycling Power Zones Calculator works

This calculator applies the Coggan seven-zone power training model to a rider's Functional Threshold Power (FTP). FTP represents the highest average power a cyclist can sustain for approximately one hour. The tool multiplies FTP by seven pairs of percentage boundaries—ranging from 0–55% (Active Recovery) through 150–200% (Neuromuscular)—to produce wattage ranges for each training intensity zone. The primary result displays Zone 3 (Tempo), spanning 75–90% of FTP, alongside all seven zones in the secondary output.

The formula

For each of the seven zones, the calculator computes:
Zone Lower Bound (W) = FTP × Lower Percentage
Zone Upper Bound (W) = FTP × Upper Percentage

The percentage pairs are: Z1 (0–0.55), Z2 (0.55–0.75), Z3 (0.75–0.90), Z4 (0.90–1.05), Z5 (1.05–1.20), Z6 (1.20–1.50), Z7 (1.50–2.00). FTP is measured in watts and typically determined via a 20-minute maximal test multiplied by 0.95, or through ramp protocols on a power meter or smart trainer.

Where this method is most accurate

The Coggan model assumes FTP has been measured under controlled conditions—preferably indoors on a calibrated power meter or trainer—within the past four to six weeks. Accuracy diminishes when FTP is estimated from non-power metrics (heart rate, perceived exertion) or when fitness has changed significantly since the last test. The zones reflect steady-state efforts;短-duration sprints and variable terrain introduce neuromuscular and pacing factors the percentage bands do not capture. Riders with unusual lactate profiles or those adapting from other endurance sports may find subjective intensity does not align perfectly with calculated zones.

What this tool does not do

This calculator generates wattage ranges from a single FTP input; it does not prescribe training volume, session structure, periodization phases, or recovery protocols. It does not measure actual power output, replace a coach's program design, or account for environmental stressors such as heat, altitude, or fatigue. The tool does not diagnose performance limitations, estimate race outcomes, or adjust zones for individual lactate or ventilatory thresholds measured in laboratory settings.

Disclaimer

This tool is intended for educational and informational purposes only. It is not medical, training, or professional coaching advice. Consult a qualified coach or healthcare provider before beginning or modifying any training program. Individual physiology, equipment calibration, and environmental conditions vary; calculated zones are estimates and may require empirical adjustment based on subjective feedback and performance data.

Questions

What is FTP and how is it measured?: Functional Threshold Power (FTP) is the highest average power a cyclist can sustain for approximately one hour. It is commonly estimated by multiplying the average power from a 20-minute maximal test by 0.95, or determined via ramp protocols on calibrated power meters and smart trainers.
Why does the calculator display Zone 3 (Tempo) as the primary result?: The implementation highlights Zone 3 (75–90% FTP) as the primary output because tempo efforts occupy a central role in many base-building and threshold-adjacent training blocks. All seven zones remain visible in the secondary details for complete reference.
How often should FTP be retested?: Fitness adaptations typically warrant retesting every four to six weeks during structured training phases. More frequent tests may be appropriate during rapid fitness gains or following illness, injury, or extended breaks from cycling.
Can these zones be used for outdoor rides with variable terrain?: The percentage-based zones reflect steady-state efforts most easily maintained on flat roads or controlled indoor environments. Variable terrain, wind, and drafting introduce power fluctuations that may cause instantaneous wattage to spike above or dip below zone boundaries even when average intensity remains within the target range.
Do the Coggan zones apply equally to all cyclists?: The seven-zone framework is widely adopted, but individual lactate and ventilatory thresholds can shift the subjective intensity experienced at a given percentage of FTP. Riders with atypical profiles—such as those with unusually high or low anaerobic capacity—may benefit from laboratory-verified personalized zones.

Sources & Methodology

Applies the Coggan seven-zone power model, multiplying FTP by fixed percentage boundaries: Z1 (0–55%), Z2 (55–75%), Z3 (75–90%), Z4 (90–105%), Z5 (105–120%), Z6 (120–150%), Z7 (150–200%). Developed by Andrew Coggan, PhD, and popularized in Training and Racing with a Power Meter.

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