Functional Threshold Power (FTP) is the highest average power (in watts) you can sustain for approximately one hour. It corresponds closely to your lactate threshold — the point where lactate accumulates faster than it can be cleared. FTP is the foundation of all structured cycling training, as training zones are defined as percentages of FTP.

Which test protocol is best?

The 20-minute test is the most widely used self-administered FTP test and usually gives stable results when pacing is good. The ramp test is easiest to execute since it's simply ride until you can't, but it tends to overestimate FTP for riders with high anaerobic capacity. The 8-minute test is a compromise. For most riders, the 20-minute test is a practical default.

Why use 0.95 for the 20-minute test?

Since FTP is meant to represent 1-hour power, and 20-minute power is typically 5% higher than 60-minute power, the 0.95 multiplier adjusts downward. Some athletes with high anaerobic capacity may need a lower factor (0.92–0.93), while very aerobically developed athletes may use 0.96–0.97. The 0.95 factor works for most riders.

What is a good FTP or W/kg?

For recreational riders, 2.0–2.5 W/kg is typical. Competitive amateurs range from 3.0–3.5 W/kg. Category 1/2 racers are typically 4.0–4.5 W/kg. Professional cyclists are 5.5–6.5+ W/kg. Raw watts depend on body weight, so W/kg is the better comparative metric.

How often should I test FTP?

Test every 4–8 weeks during a structured training block. After a rest week is ideal — you're fresh but have absorbed recent training adaptations. Don't test more frequently than every 3 weeks, as meaningful FTP changes require accumulated training stimulus.

Can I estimate FTP without a power meter?

Smart trainers on platforms like Zwift can estimate FTP through virtual tests. Outdoor riders without power meters can use heart rate zones as a rough proxy, but power is far more precise. Investing in a power meter is highly recommended if you're doing structured training. Budget options start around $200–300 for crank or pedal-based meters.

Cycling FTP Test Calculator

Calculate your Functional Threshold Power (FTP) from 20-minute, 8-minute, or ramp test results. Get Coggan power training zones and W/kg classification.

⚠️ Disclaimer: FTP estimates vary by protocol and individual physiology. Use these as training baselines and adjust zones based on workout perception.

Test Protocol

Average Power

Body Weight

Unit

20-Minute Test: 260W × 0.95

247W

3.29 W/kg

Competitive Amateur

FTP

247 W

20-Minute Test

W/kg

3.29

Competitive Amateur

1-Hour Power

~247 W

Approximate sustainable

20-Min Power (est)

~260 W

95% of 20-min = FTP

Coggan Power Training Zones

Zone	% FTP	Power (W)	Duration
Zone 1 – Recovery	0–55%	0–136W	All day
Zone 2 – Endurance	56–75%	138–185W	2–6 hrs
Zone 3 – Tempo	76–90%	188–222W	20–60 min
Zone 4 – Threshold	91–105%	225–259W	8–30 min
Zone 5 – VO2max	106–120%	262–296W	3–8 min
Zone 6 – Anaerobic	121–150%	299–371W	30s–3 min
Zone 7 – Neuromuscular	151–200%	373–494W	<30s

W/kg Classification

Level	W/kg Range
Professional	5.5+
Cat 1/2 Racer	4.5–5.5
Cat 2/3 Racer	4.0–4.5
Strong Amateur	3.5–4.0
Competitive Amateur ◀	3.0–3.5
Fit Recreational	2.5–3.0
Recreational	2.0–2.5
Beginner	<2.0

Planning notes, formulas, and examples

About the Cycling FTP Test Calculator

The Cycling FTP Test Calculator estimates your Functional Threshold Power (FTP) from common test protocols and generates personalized power training zones. FTP represents the highest average power you can sustain for approximately one hour and is one of the most widely used anchors for structured cycling training.

The calculator supports three popular FTP test protocols: the 20-minute test (FTP = 95% of 20-min average), the 8-minute test (FTP = 90% of 8-min average), and the ramp test (FTP = 75% of best 1-minute power). Enter your test results and body weight, and the calculator generates seven Coggan power training zones from recovery through neuromuscular power.

Regularly testing and tracking FTP helps keep training zones current and gives you a repeatable way to compare cycling fitness over time.

When This Page Helps

Training without knowing your FTP is like navigating without a map. Every structured cycling workout is prescribed as a percentage of FTP — if your FTP is wrong, every workout is at the wrong intensity. This calculator eliminates guesswork by converting your test data into an accurate FTP and complete zone structure.

How to Use the Inputs

Select your test protocol (20-minute, 8-minute, or ramp test).
Enter the average power (watts) from your test effort.
Enter your body weight for W/kg calculation.
View your estimated FTP in watts and W/kg.
Review all seven Coggan training zones with power ranges.
Use these zones to structure your indoor and outdoor workouts.

Formula used

FTP Estimation by Protocol:
• 20-Minute Test: FTP = Average Power × 0.95
• 8-Minute Test: FTP = Average Power × 0.90
• Ramp Test: FTP = Best 1-Min Power × 0.75

Coggan Power Zones:
• Zone 1 (Active Recovery): <55% FTP
• Zone 2 (Endurance): 56–75% FTP
• Zone 3 (Tempo): 76–90% FTP
• Zone 4 (Threshold): 91–105% FTP
• Zone 5 (VO2max): 106–120% FTP
• Zone 6 (Anaerobic): 121–150% FTP
• Zone 7 (Neuromuscular): >150% FTP

Example Calculation

Result: FTP: 247W | W/kg: 3.29 | Zone 4: 225–259W

A 20-minute average of 260W gives FTP = 260 × 0.95 = 247W. At 75 kg body weight, that's 247/75 = 3.29 W/kg. This places the rider in the “Competitive Amateur” range. Zone 4 (Threshold) = 91–105% of 247 = 225–259W, which is the target for sustained threshold intervals.

Tips & Best Practices

The 20-minute test is the most widely used and generally the most reliable. Pace it like a time trial — hard but sustainable for the full 20 minutes.
Warm up thoroughly before any FTP test: 10–15 minutes easy, then 3–5 minutes at tempo, plus a few hard efforts.
Retest FTP every 4–8 weeks to keep training zones accurate as fitness improves.
The ramp test is the easiest to execute (no pacing decisions) but tends to overestimate FTP for riders with strong anaerobic capacity.
For weight loss goals, improving W/kg matters more than raw watts. Track both metrics.
Indoor trainer FTP is typically 5–10% lower than outdoor FTP due to heat, lack of inertia, and boredom.

Understanding Coggan Power Zones

Zone 1 (Active Recovery, <55% FTP) is for recovery rides and warm-ups. Zone 2 (Endurance, 56–75% FTP) is the foundation of aerobic fitness and constitutes 60–70% of training volume. Zone 3 (Tempo, 76–90%) is “sweetspot” territory — hard enough to improve fitness but sustainable for 20–60+ minutes. Zone 4 (Threshold, 91–105%) is where FTP lives, and workouts here directly raise your ceiling. Zone 5 (VO2max, 106–120%) is for short, intense intervals of 3–8 minutes. Zones 6 and 7 cover anaerobic and sprint power.

Indoor vs Outdoor FTP

Many cyclists find their indoor FTP is 5–15% lower than outdoor. Causes include: heat buildup (indoors), less airflow, psychological monotony, bike fit differences on a trainer, and lack of road inertia affecting pedaling dynamics. It's valid to use a separate indoor and outdoor FTP for zone calculations, especially if you train primarily on one platform.

FTP Progression

New cyclists can expect rapid FTP gains of 10–20% in the first 3–6 months of structured training. After 1–2 years, improvement slows to 3–5% per year. Elite athletes may see only 1–2% annual gains. Consistency, progressive overload, and proper recovery are the keys to long-term FTP development.

Sources & Methodology

Last updated: March 28, 2026

Methodology

This worksheet converts a common field-test result into an FTP estimate using the selected protocol multiplier: 95% of a 20-minute average, 90% of an 8-minute average, or 75% of the best one-minute ramp-stage power. It then derives Coggan-style training zones as percentages of the estimated FTP and adds a simple watts-per-kilogram view using body weight.

The estimate is intentionally practical rather than laboratory-grade. Riders can outperform or underperform the default multipliers depending on anaerobic contribution, pacing, cooling, and test familiarity, so the result should be treated as a training starting point and refined from real workouts.

Sources

Training and Racing with a Power Meter (VeloPress / Hunter Allen, Andrew Coggan, and Stephen McGregor) — Common source for FTP field-test conventions and Coggan-style power-zone framing.
Training and racing using a power meter: an introduction (Andrew Coggan / presented via IP Multisport archive) — Background on FTP-centered power-based training and zone concepts.

Frequently Asked Questions

Functional Threshold Power (FTP) is the highest average power (in watts) you can sustain for approximately one hour. It corresponds closely to your lactate threshold — the point where lactate accumulates faster than it can be cleared. FTP is the foundation of all structured cycling training, as training zones are defined as percentages of FTP.