🚴 FTP to VO2 Max Calculator
Estimate your VO2 max from Functional Threshold Power for cycling or running threshold pace.
| Category | Watts / kg | Approx VO2 Max | Description |
|---|---|---|---|
| Untrained | < 2.5 | < 34 | New to cycling |
| Recreational | 2.5 – 3.5 | 34 – 45 | Regular exerciser |
| Trained | 3.5 – 4.5 | 45 – 56 | Serious amateur |
| Competitive | 4.5 – 5.5 | 56 – 66 | Category racer |
| Elite | 5.5 – 6.5 | 66 – 77 | Semi-professional |
| World Class | > 6.5 | > 77 | Professional / Tour de France |
| Level | Cycling VO2 Max | Running VO2 Max | General Fitness |
|---|---|---|---|
| Sedentary Male | 35 – 40 | 35 – 42 | 30 – 38 |
| Sedentary Female | 28 – 34 | 28 – 35 | 25 – 32 |
| Recreational Male | 42 – 52 | 44 – 55 | 40 – 50 |
| Recreational Female | 36 – 44 | 38 – 48 | 34 – 44 |
| Competitive Male | 56 – 70 | 58 – 72 | 54 – 68 |
| Elite Male | 72 – 84 | 75 – 88 | 68 – 80 |
FTP and VO2 max commonly appear in discussions about cycling, and understanding them helps to decide how one should truly train. FTP, or functional threshold power simply said is the highest average power in watts that a cyclist can keep up during almost one hour without fully crashing. Think about an engine that runs at maximum gas during sixty minutes without stopping, right at that limit where a bit more pressure would cause total failure.
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VO2 max works differently. It shows the upper limit of oxygen that your body can use to produce energy during hard effort. On the other hand, FTP estimates how closely one can reach that ceiling.
FTP and VO2 Max Explained
So, imagine VO2 max as a roof, and FTP as the measure of how far you actually live under it.
Here is where everything gets tricky: not everyone can measure them the same way. FTP is easy; one can find it on a bike trainer in the garage. But VO2 max?
That requires a lab. We talk about milliliters of oxygen used per minute per kilo of body mass, and the only reliable way to know your value is wearing a mask while you pedal until you are fully exhausted. Anything else is only a guess.
A true VO2 max test starts low… Maybe at fifty watts, then goes upward every thirty seconds or so, until you cannot last any more. Your effort reaches nine or ten out of ten, and everything ends their.
Here is something worth noting: FTP per kilo of body mass says more about your cycling fitness than VO2 max itself. Around 3.6 watts per kilo, and you probably would barely compete in some race groups. Even so, VO2 max depends oddly on weight, because it measures in kilos.
Lose some kilos, and your number climbs, even if heart and lungs did not improve at all. There is simply less body mass that requires oxygen.
Things become truly interesting when one considers FTP as a percentage of VO2 max. When FTP reaches around eighty-one to eighty-five percent of VO2 max, one starts to get fewer gains from efforts to raise the threshold. Here, it makes more sense to directly push the ceiling of VO2 max higher, instead of always working on FTP. When VO2 max grows, there appears room for FTP to also grow.
When FTP stops rising, a pause of one or two weeks fully off the bike, followed by six to eight weeks focused on VO2 max work, can restart the progress. After that period, gains in VO2 max usually reach a ceiling, no sense pushing it any more. Then one must shift focus again to building threshold.
Good training plans commonly show that FTP and VO2 max grow together over months, which shows howclosely they connect.
Online calculators can estimate your peak VO2 from your FTP value, which helps when a lab test is not possible. Knowing where your FTP stands regarding VO2 max means figuring out whether threshold training or high-intensity interval work deserves your attention now.
