{
  "slug": "cycling-power-zones",
  "title": "Cycling Power Zones Calculator",
  "category": "Cycling",
  "category_slug": "cycling",
  "tier": 1,
  "summary": "Calculate Coggan seven-zone power training ranges from your Functional Threshold Power (FTP).",
  "description": "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.",
  "page_url": "https://fitmetriclab.com/en/tools/cycling/cycling-power-zones/",
  "api_url": "https://fitmetriclab.com/api/tools/cycling-power-zones.json",
  "formula": {
    "id": "cycling_power_zones",
    "expression": "Z_i = \\text{pct}_i \\times \\text{FTP}, \\quad i \\in \\{1, \\dots, 7\\}",
    "variables": [
      {
        "symbol": "\\text{FTP}",
        "description": "Functional threshold power in watts"
      }
    ]
  },
  "inputs": [
    {
      "id": "ftp",
      "label": "FTP",
      "type": "number",
      "unit": "W",
      "default": 220,
      "min": 50,
      "max": 600,
      "step": 1
    }
  ],
  "worked_example": {
    "inputs": {
      "ftp": 220
    },
    "expected_output": "165 W–198 W (Tempo)"
  },
  "result_summary_template": "With an FTP of {ftp} watts, the Coggan seven-zone model calculates power training zones ranging from active recovery to neuromuscular efforts, yielding {result}.",
  "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.",
  "sources": [
    {
      "label": "Coggan, A. & Allen, H. Training and Racing with a Power Meter. VeloPress. 2010.",
      "url": "https://www.velopress.com/books/training-and-racing-with-a-power-meter/"
    },
    {
      "label": "Allen, H., Coggan, A., & McGregor, S. Training and Racing with a Power Meter (3rd ed.). VeloPress. 2019.",
      "url": "https://www.velopress.com/"
    },
    {
      "label": "Pallares, J.G., et al. Imposing a pause between the 20-min test and the ramp test affects the assessment of critical power in professional cyclists. J Sci Med Sport. 2018.",
      "url": "https://pubmed.ncbi.nlm.nih.gov/29102331/"
    }
  ],
  "faqs": [
    {
      "question": "What is FTP and how is it measured?",
      "answer": "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."
    },
    {
      "question": "Why does the calculator display Zone 3 (Tempo) as the primary result?",
      "answer": "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."
    },
    {
      "question": "How often should FTP be retested?",
      "answer": "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."
    },
    {
      "question": "Can these zones be used for outdoor rides with variable terrain?",
      "answer": "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."
    },
    {
      "question": "Do the Coggan zones apply equally to all cyclists?",
      "answer": "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."
    }
  ],
  "related_tools": [
    {
      "slug": "cycling-power",
      "title": "Cycling Power Calculator (Watts from Speed)",
      "api_url": "https://fitmetriclab.com/api/tools/cycling-power.json",
      "page_url": "https://fitmetriclab.com/en/tools/cycling/cycling-power/"
    },
    {
      "slug": "ftp-calculator",
      "title": "FTP Calculator (from 20-Min Test)",
      "api_url": "https://fitmetriclab.com/api/tools/ftp-calculator.json",
      "page_url": "https://fitmetriclab.com/en/tools/cycling/ftp-calculator/"
    },
    {
      "slug": "power-to-weight",
      "title": "Power-to-Weight Ratio Calculator",
      "api_url": "https://fitmetriclab.com/api/tools/power-to-weight.json",
      "page_url": "https://fitmetriclab.com/en/tools/cycling/power-to-weight/"
    }
  ],
  "last_updated": "2026-04-22",
  "price": {
    "value": 0,
    "currency": "USD"
  },
  "runs_in_browser": true,
  "disclaimer": "Educational estimate produced from a published formula. Not medical, nutritional, or training advice. Calculations are deterministic — apply the formula to the inputs to reproduce the result."
}