VO2 max calculator for cyclists
VO2max is the most oxygen your body can use per minute, in millilitres per kilo of body weight. Cyclists can estimate it from a 5-minute all-out effort: VO2max ≈ 16.6 + 8.87 × your 5-minute W/kg. No power meter? Use the heart rate method. Your result is compared with age and sex norms from the FRIEND registry.
Excellent for men aged 40–49 (about the 93rd percentile, median 37.8)
VO2max = 16.6 + 8.87 × 5-min W/kg (Sitko et al., 2022). Norms: FRIEND registry treadmill data (Kaminsky et al., 2015).
What VO2max is
VO2max is the maximum rate at which your body can take up and use oxygen during hard exercise. It is expressed in millilitres of oxygen per kilogram of body weight per minute (mL/kg/min), or in litres per minute for the absolute value. It sets the ceiling of your aerobic engine: the higher it is, the more power you can produce aerobically before you rely on energy sources you cannot sustain.
For cyclists, VO2max shows up most clearly in efforts of roughly 3 to 8 minutes: short climbs, attacks, bridging gaps. It is not the same as FTP. Two riders with the same VO2max can have very different FTPs, because FTP also depends on how large a share of that VO2max you can sustain for an hour. This calculator is part of the free LeCoach cycling calculators.
How the calculator estimates your VO2max
You can measure VO2max precisely only in a lab, breathing into a gas analyser during a ramp test to exhaustion. Outside the lab, two field methods give a useful estimate.
Method 1: 5-minute power (recommended for cyclists). In 2022, Sitko and colleagues tested 46 road cyclists in the lab and found that 5-minute maximal power relative to body weight predicted their VO2max well:
VO2max = 16.6 + 8.87 × 5-minute W/kg
Method 2: heart rate ratio (no power meter). Uth and colleagues (2004) proposed a simple estimate from maximum and resting heart rate:
VO2max = 15.3 × max heart rate ÷ resting heart rate
A rider with a max heart rate of 185 and a resting heart rate of 55 gets 15.3 × 185 ÷ 55 = 51.5 mL/kg/min. This method is much rougher. It depends on knowing your true maximum heart rate and on resting heart rate measured properly, lying down first thing in the morning. Use it to get a rough idea, not to track small changes.
How to do a good 5-minute test
The 5-minute method is only as good as the effort you put in.
- Warm up for 15 to 20 minutes, including two or three short efforts of 30 seconds at a hard pace.
- Ride 5 minutes as hard as you can at an even effort. Start controlled; the last minute should be your hardest.
- Use the average power for the full 5 minutes.
- A flat road, a steady climb or a trainer in resistance (not ERG) mode all work. Test the same way each time.
Your best 5-minute power from a recent race or hard group ride also works, as long as it was a true maximal effort.
Want this worked out for you every day? LeCoach builds your training around your own numbers.
Try LeCoach for freeWhat your result means
The calculator compares your result with reference values from the FRIEND registry (Kaminsky and colleagues, 2015): more than 7,700 maximal lab tests on healthy adults in the United States. These are general-population norms, so most trained cyclists will rank high.
| Age | Men, median | Men, 90th percentile | Women, median | Women, 90th percentile |
|---|---|---|---|---|
| 20–29 | 48.0 | 61.8 | 37.6 | 51.3 |
| 30–39 | 42.4 | 56.5 | 30.2 | 41.4 |
| 40–49 | 37.8 | 52.1 | 26.7 | 38.4 |
| 50–59 | 32.6 | 45.6 | 23.4 | 32.0 |
| 60–69 | 28.2 | 40.3 | 20.0 | 27.0 |
| 70–79 | 24.4 | 36.6 | 18.3 | 23.1 |
The FRIEND values come from treadmill tests. Most people reach a slightly lower VO2max on a bike than on a treadmill, so if anything your cycling estimate compares a little conservatively. For context, well-trained amateur road cyclists often sit between 55 and 70 mL/kg/min, and professional riders between 70 and 85.
Common mistakes
- Pacing the 5 minutes like a sprint. Starting too hard and fading gives a lower average than an even effort.
- Testing tired. VO2max efforts are very sensitive to fatigue. Test after one or two easy days.
- Using an estimated max heart rate in the heart rate method. Age formulas for max heart rate are off by 10 beats or more for many people, which moves the result by several units.
- Comparing absolute and relative numbers. A heavier rider can have a higher VO2max in litres per minute but a lower value per kilo. For climbing, the per-kilo value matters.
- Expecting VO2max to keep climbing. It responds quickly in the first months of structured training, then much more slowly. Most later gains come from using a larger share of it, which shows up as a higher FTP.
When the numbers change
- Altitude lowers VO2max: roughly 6 to 8 % per 1,000 m above about 1,500 m. Test at the altitude where you train.
- Weight change moves the per-kilo value even when your engine stays the same. Track litres per minute too.
- Age: VO2max tends to decline with age, but regular hard training slows this down a lot. Compare yourself with your own age group.
- Heat reduces maximal performance. A test on a hot day reads low.
How to raise your VO2max
The proven stimulus is time spent close to VO2max: intervals of about 3 to 6 minutes at 106 to 120 % of FTP, with recovery about as long as the effort. Classic sessions are 5 × 4 minutes, 5 × 5 minutes or 30/15 short intervals. Two sessions a week for 4 to 6 weeks, on top of a solid aerobic base, is a typical block. Our guide to VO2max training for cyclists and the article on how to structure VO2max workouts explain the details.
Want an estimate without an all-out effort? Use the Åstrand-Ryhming test calculator for a 6-minute submaximal test. To see how your 5-minute power compares with other riders, use the watts per kg calculator.
LeCoach plans VO2max blocks from your own power data and checks your HRV, sleep and resting heart rate each morning. When your recovery data says a hard VO2max day is a bad idea, it suggests an alternative and explains why.
Sources
- Sitko S, Cirer-Sastre R, Corbi F, López-Laval I. Five-minute power-based test to predict maximal oxygen consumption in road cycling. International Journal of Sports Physiology and Performance, 2022;17(1):9-15.
- Uth N, Sørensen H, Overgaard K, Pedersen PK. Estimation of VO2max from the ratio between HRmax and HRrest: the Heart Rate Ratio Method. European Journal of Applied Physiology, 2004;91(1):111-115.
- Kaminsky LA, Arena R, Myers J. Reference standards for cardiorespiratory fitness measured with cardiopulmonary exercise testing: data from the FRIEND registry. Mayo Clinic Proceedings, 2015;90(11):1515-1523.
Frequently asked questions
How do I calculate my VO2max from cycling power?
Ride 5 minutes all-out after a good warm-up, divide your average power by your body weight, and use VO2max = 16.6 + 8.87 × that W/kg. A 320 W average at 75 kg (4.27 W/kg) gives about 54.4 mL/kg/min. This equation comes from a 2022 study on road cyclists by Sitko and colleagues.
What is a good VO2max for a cyclist?
For the general population, the median is about 42 mL/kg/min for men aged 30 to 39 and about 30 for women of the same age. Well-trained amateur cyclists often reach 55 to 70, and professional riders 70 to 85. Compare yourself with your age group rather than with professionals.
How accurate is a VO2max calculator?
Field estimates are good for tracking your own trend, not for a precise single value. The 5-minute power method is the most accurate field method for trained cyclists, because power is measured directly. Heart rate methods are rougher. Only a lab test with gas analysis gives a true VO2max.
Is my Garmin or Wahoo VO2max accurate?
Device estimates combine heart rate and power or pace with their own models. They are usually in the right range and useful for trends, but they can be off by several points for an individual. If you have a power meter, the 5-minute test here is a useful second opinion.
Can I increase my VO2max after 40?
Yes. VO2max responds to training at any age. Riders in their 40s, 50s and 60s who add regular VO2max intervals to a solid aerobic base typically see clear gains in the first months. The natural decline with age is much slower in people who keep training hard.
What is the difference between VO2max and FTP?
VO2max is the size of your aerobic engine. FTP is how much of that engine you can sustain for about an hour. Two riders with the same VO2max can have different FTPs. Raising VO2max lifts the ceiling; threshold training raises the share of it you can use.
Does weight affect VO2max?
The per-kilo value does. Losing body fat raises your mL/kg/min even if your heart and lungs did not change. That is why the calculator also shows your absolute VO2max in litres per minute.
Ready to raise your VO2max?
LeCoach plans VO2max blocks around your real power and recovery data, and suggests moving a hard session when your HRV and sleep say you are not ready.
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