Cycling FTP Power Zones Calculator
Enter your Functional Threshold Power (FTP) and instantly get your complete set of cycling training zones in watts, using either the classic 7-zone Coggan model or a simplified 5-zone scheme.
Find Your Training Zones from FTP
Cycling Power Zone
Where:
- \(P_{\text{zone}}\) — power output for a given zone (W)
- \(\text{FTP}\) — functional threshold power, the highest power you can sustain for about one hour (W)
- \(f\) — the fraction of FTP that defines the zone boundary
Each zone is defined as a percentage range of your FTP. Multiplying your FTP by the lower and upper percentages gives the zone's power range in watts.
Cycling Power Zones – Calculation Example
Example: a cyclist with an FTP of 250 W wants to know their threshold zone (Zone 4) and full power zone table using the Coggan 7-zone model.
\[ P_{\text{Z4, low}} = 250 \times 0.91 = 228 \text{ W} \\ P_{\text{Z4, high}} = 250 \times 1.05 = 263 \text{ W} \]
Applying the same calculation to every zone boundary gives the complete table:
| Zone | Name | % of FTP | Watts |
|---|---|---|---|
| Z1 | Active Recovery | 0–55% | 0–138 W |
| Z2 | Endurance | 56–75% | 140–188 W |
| Z3 | Tempo | 76–90% | 190–225 W |
| Z4 | Threshold | 91–105% | 228–263 W |
| Z5 | VO₂max | 106–120% | 265–300 W |
| Z6 | Anaerobic Capacity | 121–150% | 303–375 W |
| Z7 | Neuromuscular Power | >151% | >378 W |
Result: with an FTP of 250 W, the threshold zone is 228–263 W, and endurance riding should be done at 140–188 W.
How to Use the Cycling Power Zones Calculator
- Enter your Functional threshold power (FTP) in watts. This is the highest power you can hold for roughly one hour, typically measured with a 20-minute field test or lab testing.
- Choose your Zone scheme: "7 zones (Coggan, classic)" for the detailed model used in most training plans, or "5 zones (simplified)" if you prefer fewer, broader zones.
- Read the Threshold zone range first — this is the power band around your FTP that defines sustained hard efforts.
- Check the All power zones table for the complete breakdown, including each zone's name, percentage of FTP, and power range in watts.
What Are Cycling Power Zones?
Power zones divide your entire power output range into bands, each targeting a different physiological system. Training in specific zones produces specific adaptations: long rides in Zone 2 build aerobic endurance and fat metabolism, Zone 4 work raises your threshold, and Zone 5 intervals develop your VO₂max. Without zones, terms like "ride easy" or "go hard" are vague; with zones, every workout has a precise, measurable target.
All zones are anchored to your functional threshold power (FTP) — the power you could theoretically hold for one hour in a fresh, race-like effort. Because FTP is the reference point, your zones are personal: two riders with FTPs of 200 W and 300 W will have completely different Zone 2 ranges, even if they train identically. When your FTP changes, every zone shifts with it, which is why retesting every 4–8 weeks during a training block is recommended.
The classic 7-zone model popularized by Dr. Andrew Coggan separates the extremes that simpler schemes lump together. Zone 1 is true active recovery — deliberately spinning easy — while Zones 6 and 7 cover anaerobic and sprint-style efforts that exceed 120% of FTP. The simplified 5-zone model merges everything above 105% of FTP into one zone, which is easier to follow but less precise for high-intensity interval training.
To interpret your results: most of your weekly volume (typically 70–80%) should fall in Zones 1–2, with targeted intensity sessions in Zones 4–6. A common mistake is drifting into Zone 3 on easy days — too hard to recover properly, too easy to build threshold effectively.
Assumptions, Limitations and Practical Tips
- Your zones are only as good as your FTP test. A 20-minute test result should be multiplied by 0.95 to estimate FTP; a full 60-minute effort can be used directly. Ramp tests tend to overestimate FTP for some riders, which shifts all zones too high.
- Power meters measure differently. Trainer power, crank-based meters and pedal-based meters can differ by several percent. Use the same meter for testing and training so your zones stay consistent.
- Zones don't account for fatigue or duration. On long rides, power you can sustain drops even within the same zone. Experienced riders also use "normalized power" or variable targets for intervals rather than holding a fixed wattage.
- Round sensibly. Rounding zone boundaries to the nearest 5 W makes targets easier to hit on the road without meaningfully changing the training stimulus.
- Power and heart rate don't always match. Heart rate lags power changes by 30–90 seconds. For steady efforts you can cross-check your zones against your heart rate training zones, but always let power lead during intervals.
- Context matters. On climbs, your power-to-weight ratio determines your speed, so the same zone output feels very different on flat roads versus gradients. If you're also benchmarking overall fitness, a VO₂max estimate complements your threshold data nicely.
Frequently Asked Questions
How do I calculate cycling power zones by hand without a calculator?
Take your FTP and multiply it by the boundary percentages. For example, with an FTP of 220 W, Zone 2 runs from 220 × 0.56 ≈ 123 W to 220 × 0.75 = 165 W. Repeat for each boundary (91%, 105%, 120%, 150%). Doing the full multiplication for every boundary is tedious, which is exactly what this tool automates — but the underlying math is just simple percentage multiplication.
How do I find my FTP if I don't know it yet?
The most common field test is a hard 20-minute effort: your average power for those 20 minutes multiplied by 0.95 approximates your FTP. An 8-minute test uses a factor of about 0.90. If you can genuinely hold a steady maximal effort for a full 60 minutes, that average power is your FTP directly. Always test when fresh, after a warm-up, and repeat under similar conditions for reliable tracking. If you have health concerns, consult a doctor before maximal testing.
What is a good FTP for a cyclist?
Absolute FTP depends heavily on body weight, so cyclists usually compare watts per kilogram (W/kg). Recreational riders often sit around 2–3 W/kg, fit amateurs at 3–4 W/kg, and competitive racers above 4 W/kg; professionals exceed 5–6 W/kg. Divide your FTP by your body weight in kg to see where you stand. There's no single 'good' number — the most useful benchmark is your own progress over time.
Can I convert my zones from watts to watts per kilogram?
Yes. Divide every zone boundary by your body weight in kilograms. For example, if your Zone 2 range is 140–188 W and you weigh 70 kg, that's 2.0–2.7 W/kg. This is especially useful when comparing yourself to climbs in pro races or when planning efforts on gradients, since climbing speed depends on W/kg rather than absolute power. On flat roads, absolute watts matter more due to air resistance.
Which zone scheme should I choose — 5 zones or 7 zones?
Choose the 7-zone Coggan model if you follow structured training plans or do high-intensity intervals, because it separates VO₂max, anaerobic, and sprint efforts into distinct zones. The 5-zone scheme merges everything above 105% of FTP into one band, which is simpler and pairs naturally with heart-rate-based training, but it's too coarse for precise interval targeting. Zones 1–4 are identical in both models, so the choice only affects how high-intensity work is labeled.
Why do my power zones feel too hard (or too easy) in training?
The most common cause is an inaccurate FTP — ramp tests in particular often overestimate FTP for riders who sprint well, pushing every zone too high. Fatigue, heat, and altitude also shift what you can sustain on a given day, so zones should be targets, not straitjackets. If easy rides consistently drift above Zone 2 or threshold intervals feel impossible, retest your FTP. It's normal for it to change by 5–10% across a season.
Do I need different zones for indoor trainer rides versus outdoor rides?
The zones themselves stay the same, but many riders produce slightly different power indoors — typically 5–10% lower — due to heat buildup, lack of cooling airflow, and motivation differences. If the gap is consistent, some riders keep a separate indoor FTP. At minimum, expect the same zone to feel harder on the trainer. Also make sure your trainer's power readings match your outdoor power meter, since different devices can disagree by several percent.