What is FTP in Cycling?

By WattWorks · April 13, 2026 · 8 min read

FTP is the most important metric in modern cycling training. Whether you're a pro or a weekend rider — knowing your FTP and training with it systematically will improve your performance far faster than riding by feel.

    Short definition: FTP stands for Functional Threshold Power and represents the maximum power in watts that a cyclist can theoretically sustain for 60 minutes.
  

What exactly is FTP?

The concept was popularized by exercise physiologist Andrew Coggan and is today the gold standard for power-based cycling training. FTP separates aerobic from anaerobic effort — above your FTP you work anaerobically and fatigue quickly, below it you can sustain effort for hours.

A typical recreational cyclist has an FTP of 150–250 watts. Professionals reach values of 400 watts and above — at significantly lower body weight, which gives the crucial W/kg ratio.

Typical FTP Values

Level	FTP (Watts)	W/kg (75 kg rider)
Beginner	100–150 W	1.3–2.0
Recreational	150–220 W	2.0–2.9
Advanced	220–300 W	2.9–4.0
Competitive	300–380 W	4.0–5.1
Pro	380–500 W+	5.1–6.7+

How to calculate FTP

Method 1: 20-Minute Test (recommended)

After a proper warm-up, ride as hard as you can for 20 minutes at a steady pace — no sprint at the start. Multiply your average power by 0.95:

FTP = Average power 20 min × 0.95 Example: 250 W × 0.95 = 237 W FTP

Method 2: Ramp Test

In a ramp test, you increase power by a fixed amount each minute until exhaustion. FTP is then calculated from your peak power:

FTP = Peak 1-minute power × 0.75

Method 3: eFTP (automatic)

Modern training apps like WattWorks automatically calculate your estimated FTP (eFTP) from your ride data — no explicit test needed. The power curve is analysed and your theoretical FTP derived continuously.

Why is FTP so important?

Training zones are defined as percentages of FTP (Zone 2 = 56–75% FTP)
TSS (Training Stress Score) is calculated relative to FTP
W/kg — power-to-weight ratio for climbing and comparisons
Training plan intensity is based on FTP percentages

Training Zones Based on FTP

Zone	Name	% FTP	Purpose
Z1	Active Recovery	< 55%	Easy rides, regeneration
Z2	Endurance	56–75%	Aerobic base, long rides
Z3	Tempo	76–90%	Group rides, moderate intensity
Z4	Lactate Threshold	91–105%	Threshold intervals, time trials
Z5	VO2max	106–120%	Short high-intensity intervals
Z6	Anaerobic	121–150%	Sprints, short maximal efforts
Z7	Neuromuscular	> 150%	Explosive sprints < 15 sec

How often should you test FTP?

A good rule of thumb: every 6–8 weeks, especially after intensive training blocks. Less frequently during winter base building, more often during race preparation.

How to improve your FTP

Zone 2 base training — 80% of your training in the aerobic zone (56–75% FTP)
Threshold intervals — 2×20 min at 95–105% FTP, 1–2× per week
Consistency — 3–4 sessions per week for months on end
Recovery weeks — every 3–4 weeks, reduce volume by 40–60%
Sleep & nutrition — often underestimated, but decisive

Track your FTP automatically with WattWorks

WattWorks automatically calculates your eFTP after every ride — no manual test needed. Plus training zones, CTL/ATL/TSB and an AI training plan based on your FTP.

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Frequently asked questions about FTP

What is a good FTP for a recreational cyclist?

For recreational cyclists, 2.0–3.0 W/kg is a good starting point. At 75 kg that's roughly 150–225 watts. More important than the absolute number is improvement over time.

How long does it take to improve FTP?

With structured training, improvements of 10–20 W in 8–12 weeks are realistic. Beginners often improve faster than experienced riders.

Do I need a power meter for FTP?

For accurate values, yes — a power meter is the most precise method. Alternatively, FTP can be estimated from heart rate data, but it's less accurate.

What's the difference between FTP and eFTP?

FTP is determined through an explicit test. eFTP (estimated FTP) is automatically calculated from your historical power data — no extra test needed. Apps like WattWorks calculate eFTP continuously.

Does FTP decline if you stop training?

Yes — after 2–3 weeks without training, FTP begins to decline. After 4–6 weeks, losses of 10–15% can occur. Consistent training is therefore more important than isolated intensive phases.