Cycling FTP Calculator

CYCLING ENDURANCE FTP POWER-TO-WEIGHT TRAINING ZONES

About this tool

FTP + W/kg + Coggan zones

Compute cycling FTP from 20-minute, 8-minute, or ramp test. Outputs FTP watts, W/kg power-to-weight, category benchmark + Coggan training zones 1-7.

RT-HLT-015 · Health & Fitness

Your details

Body weight (kg)

Gender (W/kg adjustment)

Test method

Estimation method

20-min average power (watts)

8-min average power (watts)

Final 1-min peak power (watts)

Your FTP (watts)

FTP

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Power-to-Weight

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Zone	% FTP	Power Range
Enter test data above to compute FTP + zones

Enter your test result + body weight to compute FTP

How to use the Cycling FTP Calculator

Pick a test method

20-min test (recommended): warm up 15-20 min, ride 20 min at maximum sustainable effort, FTP = average × 0.95. Most accurate. 8-min test: shorter, harder, FTP = average × 0.90. Less time but more painful. Ramp test: gradual power increase until failure, FTP = peak 1-min × 0.75. Easiest mentally; popular in Zwift + TrainerRoad. Direct entry: if you already know your FTP from prior tests, enter directly.

Use an accurate power meter

FTP requires a power meter or smart trainer. Wahoo KICKR, Tacx Neo, JetBlack Volt, Saris H3 trainers all provide accurate indoor power. Outdoor: pedal-based (Garmin Rally, Favero Assioma), crank-based (Quarq, 4iiii), spider-based (Power2Max), or hub-based (PowerTap). Don\'t estimate from heart rate — HR is too variable for FTP testing.

Enter weight + read W/kg

Body weight matters because cycling on climbs is gravity-dominated — pure watts matter on flats, but W/kg dominates on hills + general performance. Standard category benchmarks: under 2.0 W/kg untrained; 3.0+ committed amateur; 4.0+ elite amateur; 5.0+ pro level. (Female benchmarks ~85% of male values for equivalent category.)

Use power zones for training

FTP drives all 7 Coggan power zones: Z2 (endurance/base, 56-75% FTP) for the bulk of training volume; Z4 (threshold, 91-105%) for FTP-building intervals; Z5 (VO2 max, 106-120%) for aerobic ceiling. Polarised training (80% Z2 + 20% Z5/Z6) consistently outperforms moderate-pace "tempo" training for FTP improvement.

FTP — the metric that powered the cycling-training revolution

Functional Threshold Power (FTP) is the highest sustained power output a cyclist can hold for approximately one hour. Coined by Dr Andy Coggan and Hunter Allen in their landmark book Training and Racing with a Power Meter (2006), FTP transformed cycling training from heart-rate-based guesswork to power-based precision. Today, FTP is the foundation of nearly every structured training plan — Zwift, TrainerRoad, Wahoo SYSTM, Garmin Connect, all prescribe workouts based on FTP zones. Power meters dropped from $2,000+ in 2010 to under $200 today, democratising the metric for amateur cyclists. If you train without measuring FTP at least every 4-6 weeks, you\'re flying blind on training intensity.

The 20-minute test — why × 0.95?

FTP by definition is one-hour maximum sustainable power. Testing for 60 minutes at maximum effort is brutal + impractical. The 20-minute test is the standard proxy: ride 20 minutes at maximum sustainable effort, multiply by 0.95 to estimate the equivalent 60-minute power. The 0.95 factor accounts for the additional aerobic + anaerobic fatigue that accumulates over the longer duration — at 20 minutes, you can hold ~5% more power than at 60 minutes. Critical for accurate testing: (1) Proper warm-up (15-20 min including some hard openers); (2) Maximum sustainable pacing (don\'t start too fast); (3) Mental preparation — 20 minutes of all-out effort is genuinely hard; (4) Fresh legs (no hard rides 2-3 days prior). Alternative: 8-min × 0.90 — shorter, sharper, but pacing is harder; many athletes underperform the 8-min protocol. Alternative: ramp test × 0.75 — power increases gradually until failure; easiest mentally; popular in Zwift + TrainerRoad.

FTP doubles weekly training time efficiency vs heart-rate training. Power meters dropped from $2,000 in 2010 to under $200 today — there's no excuse not to use them.

W/kg — why power-to-weight dominates cycling

Cycling on flat roads is dominated by aerodynamic drag (proportional to speed squared) — raw watts matter most. Cycling on climbs is dominated by gravity — overcoming the weight × elevation gain is the work. The metric that captures both is watts per kilogram (W/kg): FTP divided by body weight. Category benchmarks (men; women ~85%): Cat 5 (recreational) 2.0-2.5 W/kg; Cat 4 (regular trainer) 2.5-3.0; Cat 3 (committed amateur) 3.0-3.5; Cat 2 (semi-pro amateur) 3.5-4.0; Cat 1 (elite amateur / domestic pro) 4.0-5.0; World Tour pro 5.0+. Elite Tour de France climbers sustain 6.0-6.5 W/kg for 40+ minutes on mountain climbs. Tadej Pogačar, considered the best climber of his generation, weighs ~66kg and produces ~430W FTP — 6.5 W/kg. For amateurs: 1 W/kg improvement on climbs makes a dramatic difference in finish times; the same improvement is much smaller on flat terrain. Pro cyclists optimize body weight aggressively because every kilo lost = improved W/kg on hills.

The ASEAN cycling scene

Cycling has grown rapidly across ASEAN markets over the past decade. Singapore: developed competitive scene with weekly races (Choa Chu Kang Loop, Bukit Timah); major events like OCBC Cycle (mass participation), Tour de Singapore. Limited terrain (no real hills) emphasizes flat power + W/kg matters less; raw watts + pacing skill dominate. Malaysia: Le Tour de Langkawi (UCI-sanctioned), Genting Highlands climbs (challenging mountain terrain favouring W/kg). Thailand: Tour of Thailand + extensive amateur scene, especially in Bangkok + Chiang Mai. Indonesia + Vietnam + Philippines: emerging scenes with growing organised events. Indoor training is dominant in ASEAN: tropical heat (30-35°C outdoors) drives most serious training inside with air-conditioning. Zwift + Wahoo SYSTM + TrainerRoad widely used. Heat considerations: outdoor FTP at 30°C+ runs 5-15% below indoor air-conditioned FTP. Always note conditions when comparing test results. Coastal Singapore + flat KL urban offer reasonable outdoor windows in cooler December-February months.

10 Things to Know About FTP

FTP = 60-min max sustainable power. Definition coined by Coggan + Allen in their 2006 book.

20-min test × 0.95 = estimated FTP. The standard amateur test protocol.

W/kg matters on climbs; raw watts matter on flats. Lighter riders dominate climbing; heavier riders dominate sprint + time trial flats.

Pro Tour FTP: 5.0-6.5 W/kg. Pogačar ~6.5; Roglič ~6.4; Vingegaard ~6.3 — all sustained for 40+ min on Tour climbs.

Untrained → trained cyclist: FTP gains 20-50% in first year. Trained → fitter: 2-5% per season.

Polarised training (80% Z2 + 20% Z5/Z6) beats moderate "tempo" training for FTP improvement.

Power meters dropped from $2000+ in 2010 to under $200 today. Wahoo, Garmin, 4iiii all affordable.

Female benchmarks are ~85% of male for equivalent categories — different power output ceiling per kg.

Outdoor FTP in tropical 30°C heat runs 5-15% below indoor air-conditioned. ASEAN cyclists train mostly indoors.

Re-test FTP every 4-6 weeks during training blocks; otherwise zones drift out of sync with fitness.

Frequently Asked Questions

20-min × 0.95 is the gold standard. Most accurate, most validated, but mentally brutal. Ramp test (used by Zwift + TrainerRoad) is easier mentally + still pretty accurate. 8-min test is short but pacing is harder. For most amateurs: ramp test for monthly checks, 20-min test for serious quarterly assessments. Direct entry is fine if you already know your FTP from another source.
The ramp test starts at a low power (typically 100W) and increases ~20W per minute until failure. The "peak 1-minute" is your maximum 1-minute power before quitting — typically reached in the final minute as your legs explode. FTP is estimated at 75% of this peak — empirical fit across thousands of athletes. Slightly less accurate than 20-min test but much more comfortable; you can do them monthly without dread.
No. Heart rate is too variable — it drifts with hydration, temperature, sleep, stress, training fatigue. The same HR doesn\'t correspond to the same power across days, let alone across athletes. You NEED a power meter for accurate FTP. The good news: power meters cost $200-400 today and pay for themselves quickly in training efficiency. Pedal-based (Favero Assioma), single-side crank (4iiii), hub-based (PowerTap) all reliable starter options.
Every 4-6 weeks during active training, especially after high-volume blocks. If FTP isn\'t updated, your power zones drift below your actual fitness — Z4 intervals become Z3 tempo, no longer pushing the right adaptation. Off-season (low-intensity base): every 8-12 weeks. Pre-race / peaking: 2-3 weeks out from key events. After breaks (illness, vacation, off-season): re-test before resuming structured intervals.
Common situation. Indoor (air-conditioned, no traffic, no descending breaks, structured cadence) produces consistently higher FTP than outdoor. Outdoor adds: traffic, terrain breaks, cooling-down on descents, mental load. Typical gap: indoor FTP runs 5-15% higher than outdoor FTP in tropical heat. Practical implication: maintain separate FTP values for indoor + outdoor training if you do both seriously. Don\'t prescribe outdoor zones based on indoor FTP — your zones will be too high, leading to overload + injury.
Rough mapping: Cat 5 ~2.0-2.5 W/kg; Cat 4 ~2.5-3.0; Cat 3 ~3.0-3.5; Cat 2 ~3.5-4.0; Cat 1 ~4.0-5.0+. But: real racing also depends on tactics, sprint power, climbing skill, descending — pure FTP doesn\'t determine race category in isolation. World Tour pros are typically 5.5-6.5+ W/kg AND have exceptional sprint power, tactical awareness, team support. For Zwift: similar W/kg categories used — A category (4+ W/kg), B (3.2-4.0), C (2.5-3.2), D (under 2.5).
Polarised training: ~80% volume at Z2 (easy endurance, builds aerobic base + mitochondrial density) + ~20% volume at Z5/Z6 (VO2 max + anaerobic, raises peak power). Avoid the "gray zone" of Z3 tempo training — feels productive, but produces diminishing returns vs polarised. Sample structure: 2-3× per week Z2 long rides (60-90 min); 1× per week 4-5× 4-min Z5 intervals; 1× per week 20-30 min Z4 threshold; 1-2 rest/easy days. Total 8-12 hours/week for amateur trainers.
Less so. Flat-course racing rewards raw watts (FTP, sustained power) over W/kg — heavier riders with high FTP win sprints + flat time trials. Singapore amateur racers, who train almost exclusively on flat terrain, often have lower W/kg but higher pure-watt FTP than equivalent-category climbers. If you race climbs: W/kg matters most; weight loss + FTP improvements compound. If you race flat: raw FTP matters most; weight optimisation less critical. Time trials: aerodynamics + raw watts dominate; W/kg less relevant.
No. All calculations run in your browser via JavaScript. Open DevTools → Network and confirm zero outbound requests. Power test data + body weight stay on your device. Safe for personal training tracking.
Pair with: VO2 Max Calculator (RT-HLT-011) for aerobic baseline; Sweat Rate Calculator (RT-HLT-014) for hydration planning; Heart Rate Calculator (RT-HLT-009) for HR zones. External cycling-specific: Zwift, TrainerRoad, Wahoo SYSTM for structured training; TrainingPeaks WKO5 for advanced analytics; Coggan + Allen book "Training and Racing with a Power Meter" (the foundational FTP text); Joe Friel\'s "The Cyclist\'s Training Bible".

Cycling FTP Calculator