Blog · FTP and testing

What Is a Good FTP? W/kg by Age and Level

· 10 min read · The WattAscent team

A good FTP is best judged in watts per kilogram (W/kg), not raw watts. On the widely used Allen and Coggan ratings, about 2.8 to 3.9 W/kg rates as “good” for men and about 2.4 to 3.3 W/kg for women, and the typical number drifts down with age. The comparison that matters most, though, is your FTP today against your FTP last season.

W/kg calculator

Enter your FTP and weight to see your watts per kilogram and its rating.

3.33 W/kg Good

Ratings from the Allen and Coggan FTP scale, as published by Garmin. Treat them as rough bands.

Why W/kg matters more than raw watts

Your functional threshold power (FTP) is roughly the highest power you can hold for about an hour. If you’re new to the idea, start with What Is FTP?. On its own, though, an FTP number says little about how fast you’ll actually be.

A 90 kg rider with a 280 W FTP and a 65 kg rider with a 230 W FTP aren’t on equal terms on a climb. Going uphill, you’re lifting your own body and your bike against gravity, so the power you can produce for each kilogram you carry decides your speed. That’s why W/kg is the standard way to compare riders of different sizes, and to compare yourself across seasons if your weight changes.

Raw watts still matter. On flat roads and in time trials, most of your effort goes into pushing air out of the way, and air resistance depends far more on your size and position than on your weight. That’s why bigger riders with high absolute power often shine on flat courses even when their W/kg is modest. If your goals are flat races or time trials, track both numbers.

How to calculate your W/kg

Divide your FTP in watts by your body weight in kilograms.

To keep the number honest over time:

FTP ratings by W/kg

The table below is the FTP rating scale Garmin uses in its devices. Garmin credits it to Hunter Allen and Andrew Coggan’s Training and Racing with a Power Meter (Garmin, n.d.).

Rating Men (W/kg) Women (W/kg)
Superior 5.05 and above 4.30 and above
Excellent 3.93 to 5.04 3.33 to 4.29
Good 2.79 to 3.92 2.36 to 3.32
Fair 2.23 to 2.78 1.90 to 2.35
Untrained below 2.23 below 1.90

Treat these as rough bands, not grades. Two things blur the edges:

FTP by age: what one large rider dataset shows

The training platform A Faster You published FTP results from 1,710 riders who completed its power test, using each rider’s best valid test (A Faster You, 2026). Here are the medians, meaning half of the riders in each group were above the number and half below:

Age Men: median W/kg Women: median W/kg
Under 30 4.95 4.07
30 to 39 4.30 3.57
40 to 49 4.00 3.48 (40 and older)
50 to 59 3.63 3.48 (40 and older)
60 and older 3.23 3.48 (40 and older)

These numbers are useful, but read them with the limits the authors themselves point out:

The takeaway: if you’re anywhere near these medians, you’re a very strong rider. If you’re well below them, you’re in good company with most cyclists.

How much does FTP drop with age?

Some decline is real, but it’s smaller and slower in cycling than many riders fear.

A review of master athletes found that endurance performance declines by roughly 8% to 15% per decade, depending on the sport, the event length and sex (Lepers & Stapley, 2016). In triathletes, cycling performance declined less with age than running or swimming did. The same review notes that maximal aerobic capacity (VO2max) falls by about 10% per decade after age 30 in healthy sedentary adults, which is a main driver of the decline. Riders who keep training are working against a smaller headwind.

A single rider’s career can be revealing too. A case study of one cyclist’s 488 time trials over nearly four decades found that his performance stayed relatively stable from age 37 to 52 (Dyer, 2020). It noticeably declined from 61 and dropped sharply around 70. The author concluded that chasing personal bests can remain realistic until relatively late in life. One rider can’t speak for everyone, but the pattern is encouraging.

What this means for you:

If you have heart, blood pressure or other health concerns, check with your doctor before adding hard intervals to chase a higher FTP.

FTP for women

Both data sources above show women’s W/kg bands sitting below men’s. In the Allen and Coggan ratings, the threshold for “good” starts at 2.36 W/kg for women versus 2.79 W/kg for men (Garmin, n.d.). In the A Faster You data, women under 30 had a median of 4.07 W/kg against 4.95 W/kg for men in the same age group (A Faster You, 2026).

The practical point: compare yourself against the women’s column, not the men’s. A woman at 3.4 W/kg is in the “excellent” band.

The best comparison is your past self

Ratings tables and age charts are fun, but they can’t tell you whether your training is working. Your own trend can.

This is the idea behind WattAscent’s Adaptive FTP. Instead of waiting for test days, WattAscent checks your FTP every two weeks using your best efforts from WattAscent workouts and tests, and from Strava if you connect it, along with whether you’re finishing your hard workouts. Raises are capped at 6% per check so one great day doesn’t push your targets out of reach.

How to raise your W/kg

There are two ways to raise W/kg: more power or less weight. More power is the better place to focus, because it makes you faster everywhere, flat roads included.

Be careful with the weight side of the ratio. Eating too little to train well tends to cost you power, recovery and health. If you want to change your body weight, talk to a doctor or registered dietitian first.

Track your W/kg as it climbs

WattAscent builds your training around your current FTP and keeps it up to date as you get fitter, so your targets always match where you are now. Plans adapt to your schedule, your recovery and your goals. If you’re ready to see your own number climb, start training.

Frequently asked questions

Is 3 W/kg a good FTP?

For men, 3.0 W/kg falls in the “good” band (2.79 to 3.92 W/kg) on the Allen and Coggan ratings. For women, 3.0 W/kg is also “good” and close to the “excellent” band, which starts at 3.33 W/kg. Either way, it’s a solid level for a recreational rider.

Is 4 W/kg a good FTP?

Yes. For men, 4.0 W/kg is in the “excellent” band (3.93 to 5.04 W/kg). For women, it’s comfortably “excellent” (3.33 to 4.29 W/kg). Most riders who reach 4 W/kg have trained consistently for years.

Does FTP decline after 40?

Endurance performance does tend to decline with age, but the review cited above found cycling declines less than running or swimming. One long-term case study showed a rider’s time trial performance stayed relatively stable from 37 to 52. Consistent training matters more than age for most riders in their 40s.

Should I lose weight to improve my W/kg?

Focus on raising your power first, because power helps on every kind of terrain. Cutting food intake while training hard often hurts your power and recovery. If you’re considering a weight change, get advice from a doctor or registered dietitian.

How often should I check my W/kg?

Every few weeks is plenty. Your FTP changes slowly, and day-to-day weight swings can make daily checks misleading. Look at the trend over a training block or a season.

References

  1. A Faster You (2026). FTP by Age Chart: Watts per Kg (1,710 Riders). A Faster You. link
  2. Borszcz, F., Tramontin, A., Bossi, A., Carminatti, L., & Costa, V. (2018). Functional Threshold Power in Cyclists: Validity of the Concept and Physiological Responses. International Journal of Sports Medicine, 39(10), 737–742. link
  3. Dyer, B. T. J. (2020). An aging cyclist’s time trial performances over four decades: a case study. Journal of Science and Cycling, 9(3), 23–28. link
  4. Garmin (n.d.). FTP Ratings, citing H. Allen and A. Coggan, Training and Racing with a Power Meter (VeloPress, 2010). Garmin Venu X1 Owner’s Manual. link
  5. Lepers, R., & Stapley, P. J. (2016). Master Athletes Are Extending the Limits of Human Endurance. Frontiers in Physiology, 7, 613. link

WattAscent articles are for general education, not medical advice. Check with your doctor before starting or changing a training program, especially if you have a health condition.