Cycling VO2 Max
Calculator.
Estimate your VO2 max in ml/kg/min from heart rate or from cycling power, then see how the number rates for your age and sex and what it means for your training.
Results update as you type. This is an estimate, not a laboratory measurement. Use it to track your own trend over months rather than to compare yourself against another rider.
How the calculator works
VO2 max is the most oxygen your body can take in and use per minute at maximal effort. Both methods below estimate it from something easier to measure than gas exchange, so both carry error. The power method is generally the closer of the two for cyclists.
What the number means
The bands below follow the widely published Cooper Institute norms for cardiorespiratory fitness, in ml/kg/min. They are population percentiles, not cycling-specific targets, so a keen amateur road cyclist will often sit in the top band and still be a long way off a professional.
| Age | Fair (men) | Good (men) | Excellent (men) | Excellent (women) |
|---|---|---|---|---|
| 20 to 29 | 38 to 43 | 44 to 51 | 52 and above | 42 and above |
| 30 to 39 | 34 to 39 | 40 to 47 | 48 and above | 41 and above |
| 40 to 49 | 30 to 35 | 36 to 43 | 44 and above | 39 and above |
| 50 to 59 | 25 to 31 | 32 to 39 | 40 and above | 36 and above |
| 60 and over | 21 to 26 | 27 to 35 | 36 and above | 33 and above |
If you want to turn the estimate into training, pair it with the FTP and power zones calculator for your everyday zones, and the climb and gradient watts calculator to see what your aerobic ceiling is worth on a hill.
Cycling VO2 max FAQ
It depends heavily on age and sex. For a man in his thirties, roughly 48 and above is excellent and above 51 is superior on the commonly published Cooper Institute norms. For a woman in her thirties, roughly 41 and above is excellent. Trained amateur road cyclists often sit in the 50s, and professional road riders are usually measured in the 70s and low 80s.
Treat it as a ballpark. A lab test with a metabolic cart measures gas exchange directly and is the only true measurement. Estimates from heart rate or power typically land within about 10 to 15 percent of a lab figure for most people, which is close enough to track your own trend over months but not close enough to compare yourself precisely against someone else.
This calculator uses the Uth-Sorensen-Overgaard-Pedersen ratio, which estimates VO2 max as 15.3 multiplied by your maximum heart rate divided by your resting heart rate. It works because a low resting heart rate relative to your maximum reflects a large stroke volume, which is the main driver of aerobic capacity. It is very sensitive to a badly measured resting heart rate.
The power method uses the ACSM cycle ergometer equation: VO2 in ml/kg/min is roughly 10.8 times watts divided by body mass in kilograms, plus 7. Feed it your best 5 minute power, because a 5 minute maximal effort is close to the power at which most riders reach VO2 max. If you only know your FTP, the calculator scales it up to an estimated 5 minute power first.
Use the power method if you have a power meter or a smart trainer and a recent 5 minute maximal effort. It is measuring the thing that actually matters, which is oxygen cost of work, so it is generally the more reliable of the two. Use the heart rate method if you have no power data, and measure resting heart rate properly, lying still first thing in the morning across several days.
Yes, though the ceiling is partly genetic. Most untrained people can add a meaningful amount in the first few months of consistent aerobic training. Beyond that, gains come slowly and mainly from a large base of easy riding plus regular intervals near maximal aerobic power, typically 3 to 5 minute efforts with similar recoveries. Losing excess body mass also raises the ml/kg/min number without changing your absolute litres per minute.
Because cycling performance on any gradient depends on power relative to weight. Expressing oxygen uptake per kilogram of body mass makes riders of different sizes comparable, and it is the number that predicts climbing ability. Absolute VO2 max in litres per minute matters more on the flat and in time trials, so this calculator shows both.
On average yes, roughly 1 percent a year from around age 30 in sedentary people, largely through a falling maximum heart rate and reduced stroke volume. Consistent endurance training slows that decline substantially, and it is common for a well trained rider in their fifties to hold a higher VO2 max than an untrained person in their twenties.