FTP Calculator (Functional Threshold Power)
Calculate your FTP from a 20-minute max-effort test. Get your 7 cycling power training zones and W/kg ratio to benchmark your fitness against elite riders.
Specialized Versions
Scientific Methodology & Accuracy
Our tools are built using peer-reviewed research and industry-standard formulas. This specific calculator utilizes POWER CALCULATOR metrics validated by sports science organizations like the ACSM and NSCA.
HRV (Heart Rate Variability) is a scientifically validated metric for assessing autonomic nervous system status.
Performance Concept
"Data-driven coaching is the future of individualized athletic success and health."
Expert Protocol
"Dynamic warm-ups are far superior to static stretching for explosive power and injury prevention. Improper form at high intensities increases the likelihood of long-term structural misalignments."
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How to Use This Tool
- 1
Enter your current fitness metrics and goal parameters into the FTP Calculator (Functional Threshold Power).
- 2
Review the calculated outputs and compare against your current training performance to assess the gap.
- 3
Integrate the results into your next training plan by setting specific weekly targets based on the data.
- 4
Reassess inputs every 4–6 weeks to ensure your calculations reflect your current fitness level accurately.
Key Terminology
Frequently Asked Questions
Q1 How does cadence affect cycling performance?
Higher cadence (85–100 RPM) shifts effort from muscles to the cardiovascular system, reducing local muscular fatigue on long rides. Lower cadence (<70 RPM) increases torque demands and knee joint stress. Most coached cyclists aim for 85–95 RPM.
Q2 How do I calculate speed from gear ratio and cadence?
Speed (km/h) = (chainring teeth ÷ cassette teeth) × wheel circumference (m) × cadence (RPM) × 0.06. A 50×17 gear at 90 RPM with a 2.1m wheel circumference produces approximately 33.5 km/h.
Q3 How often should I retest my FTP?
Every 6–8 weeks during a structured training block. FTP can improve significantly in the first 3–6 months of structured training (10–20%), then at 3–8% per year as you approach your genetic ceiling.
Q4 Does aerodynamic position matter for recreational cyclists?
Yes. At 35 km/h, aerodynamic drag accounts for approximately 85% of total resistance. Dropping your torso 10–15 degrees from upright can reduce CdA by 15–25%, saving 20–40 watts — a significant improvement accessible to all cyclists.
What Is FTP?
Functional Threshold Power (FTP) is the highest average power output you can sustain for approximately one hour. It is the single most important metric in structured cycling training — all training zones are anchored to it.
FTP was popularized by exercise physiologist Dr. Andrew Coggan and Joe Friel, and is used universally across TrainingPeaks, Zwift, and Wahoo SYSTM.
The 20-Minute FTP Test Protocol
- Warm up for 15–20 minutes, including 2–3 short hard efforts (30 sec at max)
- Rest 5 minutes easy
- Ride 20 minutes at maximum sustainable effort
- Multiply average power by 0.95 — corrects for the fact that 20-minute power is ~5% higher than true 1-hour power
FTP = 20 ext{-min avg power} imes 0.95
*Source: Allen H, Coggan A (2010). Training and Racing with a Power Meter. VeloPress.*
Ramp Test Alternative
The ramp test (used by Zwift and Wahoo): - Progressive 1-minute intervals at increasing wattage until failure - FTP ≈ 75% of your best 1-minute power
💡 Tip
Less mentally demanding than the 20-min test and reliable for most riders. Can slightly overestimate FTP for pure endurance riders — if your 20-min test and ramp test disagree by > 10%, trust the 20-min result for threshold work.
Coggan Power Training Zones
| Zone | Name | % of FTP | Physiological Target |
|---|---|---|---|
| 1 | Active Recovery | < 55% | Easy spinning, blood flow |
| 2 | Endurance | 56–75% | Aerobic base, fat oxidation |
| 3 | Tempo | 76–90% | Sustained aerobic effort |
| 4 | Lactate Threshold | 91–105% | FTP development |
| 5 | VO2 Max | 106–120% | Aerobic capacity ceiling |
| 6 | Anaerobic Capacity | 121–150% | Short, hard efforts |
| 7 | Neuromuscular Power | > 150% | Sprint, peak power |
W/kg Benchmarks
*Source: Coggan A. (2003). Power Training Levels. TrainingPeaks.*
⚠️ Warning
FTP testing is a high-intensity effort. Individuals with cardiovascular conditions should consult a physician before performing maximal cycling tests.
Use Cases / Example Scenarios
Model your drivetrain across all gears at multiple cadences to find the most efficient setup before purchasing new components.
After a 20-minute all-out effort, use this tool to calculate your FTP and automatically set all 7 Coggan training zones.
Input your power output, body weight, and gradient to project your VAM (meters/hour) and compare to segment benchmarks.
Identify the optimal chainring/cassette combination for your target cadence (85–95 RPM) on your most common terrain.
Calculate sustainable race watts to prevent early fatigue. Stay at 88–93% FTP (Sweet Spot) for events over 90 minutes.
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