How do I calculate FTP from a 20-minute test?

Ride at maximum sustainable effort for 20 minutes and record your average power in watts. Multiply that number by 0.95 to estimate your FTP. For example, if your average 20-minute power is 250W, your estimated FTP is 250 × 0.95 ≈ 238W. This is the gold standard field test, established by Hunter Allen and Andrew Coggan.

How is FTP calculated from a ramp test?

In a ramp test, power increases by a fixed amount (usually 20W) every minute until you can no longer maintain the target. Your FTP is estimated as 75% of your best 1-minute power achieved during the test. For example, if your best minute was 350W, your FTP estimate is 350 × 0.75 ≈ 263W. Ramp tests are the easiest to execute but may overestimate FTP for riders with strong anaerobic capacity.

What is a good FTP for my weight and gender?

FTP is best evaluated using W/kg (watts per kilogram). For recreational male cyclists, 2.5–3.5 W/kg is typical; competitive club riders achieve 3.5–4.5 W/kg; and professionals sustain 5.5–6.5 W/kg. Female benchmarks are roughly 0.5–1.0 W/kg lower at equivalent fitness levels. FTP typically peaks in the mid-20s to early 30s and declines about 5–8% per decade after age 35.

What are the Coggan power training zones?

The Coggan model defines 7 training zones as percentages of FTP: Zone 1 Active Recovery (<55%), Zone 2 Endurance (56–75%), Zone 3 Tempo (76–90%), Zone 4 Lactate Threshold (91–105%), Zone 5 VO2max (106–120%), Zone 6 Anaerobic Capacity (121–150%), and Zone 7 Neuromuscular Power (151%+). Each zone targets different energy systems and has specific training applications.

How often should I retest my FTP?

Most coaches recommend retesting every 6 to 8 weeks during structured training blocks. FTP can improve 5–15% over a focused training period. Retesting ensures your training zones remain accurate. Avoid testing when fatigued — schedule tests after a rest day or easy week for the most reliable results.

How does FTP relate to VO2max?

FTP typically represents 75–85% of your power at VO2max. VO2max measures your maximum oxygen consumption capacity (the ceiling), while FTP measures the highest power you can sustain without accumulating unsustainable lactate (the threshold). Two riders with identical VO2max can have very different FTPs depending on training, muscle fiber composition, and lactate clearance efficiency.

Can I calculate FTP without a power meter?

A power meter or smart trainer is required for an accurate FTP test since FTP is measured in watts. Without one, you can use heart rate training zones as an alternative for structuring workouts. Indoor training apps like Zwift, TrainerRoad, and Wahoo SYSTM offer built-in FTP tests using the trainer's power measurement. Some apps like Strava can also estimate FTP from ride data.

Does Zwift or Strava calculate FTP automatically?

Yes. Zwift can detect FTP improvements during rides and offers dedicated FTP tests (20-minute and ramp). Strava estimates FTP from your best 20-minute power efforts across rides. Garmin devices can auto-detect FTP during outdoor rides. All use the standard formulas — 95% of 20-minute power or 75% of best 1-minute ramp power. You can also manually set your FTP in any of these platforms.

FTP Calculator

Test Protocol

Ride at max effort for 20 minutes. FTP = average power × 0.95.

Average 20-Minute Power (W)

Body Weight (kg)

Sex

Age

Estimated FTP

238W

Moderate

20-Minute Test · 250W input · ♂ 30y

Power Metrics

Key performance indicators from your FTP

W/kg

3.40

Power-to-weight

Est. VO2max

56.0

ml/kg/min

Energy / Hour

857

Coggan Power Zones

Based on your FTP of 238W

Z1 Active Recovery

0–55%

0–131W

Z2 Endurance

56–75%

132–179W

Z3 Tempo

76–90%

180–214W

Z4 Lactate Threshold

91–105%

215–250W

Z5 VO2max

106–120%

251–286W

Z6 Anaerobic Capacity

121–150%

287–357W

Z7 Neuromuscular Power

151%+

358W+

W/kg Classification

Your position on the Coggan power profile (Male)

World Class

5.8+

Exceptional

5.2–5.8

Excellent

4.6–5.2

Very Good

4.0–4.6

Good

3.5–4.0

Moderate

3.0–3.5

Fair

2.5–3.0

Untrained

0.0–2.5

What Is FTP (Functional Threshold Power)?

The key metric for structured cycling training

FTP

Max sustainable watts

W/kg

Power-to-weight ratio

Coggan training zones

FTP (Functional Threshold Power) is the highest average power, measured in watts, that you can sustain for approximately one hour. It represents your lactate threshold — the intensity where lactate production begins to exceed clearance in your muscles.

Whether you search for an FTP calculator, cycling FTP calculator, or FTP zone calculator, this tool estimates your Functional Threshold Power from six different test protocols, calculates your Coggan power training zones, and classifies your fitness by W/kg.

Accuracy note: Shorter tests (3-min, 5-min) are less accurate because they rely more on anaerobic capacity. The 20-minute test is the best balance of accuracy and practicality. Always warm up thoroughly — 15 minutes of progressive effort is recommended before any FTP test.

How FTP Is Calculated

Step-by-step formula with protocol-specific multipliers

Step 1.Select your test protocol

20-min, 8-min, 5-min, 3-min, ramp, or 60-min test

Step 2.Apply the protocol multiplier

FTP = Average Power × Multiplier (see table below)

Step 3.Calculate W/kg ratio

W/kg = FTP (watts) ÷ Body Weight (kg)

Step 4.Derive training zones

Zone watts = FTP × Zone % (Coggan 7-zone model)

Test Protocol	Multiplier	Best For
20-Minute Test	× 0.95	Gold standard for trained cyclists
8-Minute Test	× 0.90	Newer riders, pacing-challenged
5-Minute Test	× 0.87	Time-limited athletes
3-Minute Test	× 0.80	Quick estimate, less accurate
Ramp Test	× 0.75	Indoor trainers, Zwift, easiest execution
60-Minute Test	× 1.00	Definitive but impractical for most

The 20-minute test multiplier of 0.95 was established by Hunter Allen and Andrew Coggan in Training and Racing with a Power Meter. Other multipliers are derived from the typical relationship between effort duration and sustainable power.

W/kg Benchmarks by Level

How FTP relative to body weight classifies cycling fitness

Classification	Male W/kg	Female W/kg
World Class	5.80+	5.10+
Exceptional	5.20–5.79	4.60–5.09
Excellent	4.60–5.19	4.00–4.59
Very Good	4.00–4.59	3.50–3.99
Good	3.50–3.99	3.00–3.49
Moderate	3.00–3.49	2.50–2.99
Fair	2.50–2.99	2.00–2.49
Untrained	<2.50	<2.00

Why W/kg matters more than raw watts: A 200W FTP means very different things for a 60 kg rider (3.33 W/kg — Moderate) versus a 90 kg rider (2.22 W/kg — Untrained). W/kg is the definitive metric for comparing cycling fitness, especially on climbs where power-to-weight determines speed.

Coggan Power Training Zones

The 7-zone model by Andrew Coggan & Hunter Allen

Zone	% FTP	Purpose
Z1 Active Recovery	<55%	Easy spinning, recovery rides
Z2 Endurance	56–75%	Base building, long rides
Z3 Tempo	76–90%	Muscular endurance, sweet spot training
Z4 Threshold	91–105%	FTP improvement, race-pace efforts
Z5 VO2max	106–120%	Aerobic capacity, 3–8 min intervals
Z6 Anaerobic	121–150%	High power, 30s–3 min efforts
Z7 Neuromuscular	151%+	Sprints, 5–20 second max efforts

FTP vs Critical Power vs VO2max

How the three key cycling metrics compare

Metric	Measures	Testing
FTP	Max sustainable 1-hour power (lactate threshold proxy)	20-min or ramp test with power meter
Critical Power	Mathematical asymptote of power–duration curve	Multiple efforts (3 + tests of different durations)
VO2max	Maximum oxygen consumption capacity (aerobic ceiling)	Lab test or field estimate from race times

How FTP relates to VO2max: FTP typically represents 75–85% of your power at VO2max. A higher VO2max sets a higher ceiling for potential FTP, but two riders with the same VO2max can have very different FTPs based on training and lactate clearance efficiency.

How to Improve Your FTP

Evidence-based strategies for raising your threshold

Build Your Aerobic Base

Spend 80% of training time in Zones 1–2. Long, steady rides develop the aerobic engine that underpins FTP. Consistency matters more than intensity for base work.

Threshold Intervals

2–3 sessions per week of 10–20 minute efforts at 95–105% FTP. These directly target your lactate threshold and teach your body to sustain higher power.

VO2max Work

3–5 minute intervals at 106–120% FTP improve oxygen delivery to muscles, raising the ceiling for your FTP. Include 1–2 sessions per week during build phases.

FTP Changes With Age

FTP typically peaks in the mid-20s to early 30s and declines ~5–8% per decade after 35. Trained older athletes maintain significantly higher values than untrained younger riders.

Frequently Asked Questions

Common questions and detailed answers

The 60-minute test is the definitive gold standard since average power directly equals FTP. However, the 20-minute test (× 0.95) is the most practical and widely accepted. The ramp test is easiest to execute but can overestimate FTP for anaerobic riders. Shorter tests (3-min, 5-min) are least accurate. Choose based on your experience — beginners may prefer the ramp test, while experienced cyclists get more accurate results from the 20-minute test.

FTP is a single-test estimate of your 1-hour sustainable power, using a fixed multiplier (e.g., 20-min × 0.95). Critical Power (CP) is a mathematical model derived from multiple efforts of different durations that calculates the asymptote of your power-duration curve. CP is generally considered more scientifically rigorous but requires multiple tests. In practice, FTP and CP values are usually within 5% of each other for trained cyclists.

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Last updated Apr 23, 2026