🏊 Swimming VO2 Max Calculator
Estimate your swimming aerobic fitness from a 400m time trial or 12-minute distance test
| Age Group | Male — Below Avg | Male — Average | Male — Good | Male — Excellent |
|---|---|---|---|---|
| 20–29 | <32 | 32–40 | 41–50 | 51+ |
| 30–39 | <30 | 30–38 | 39–47 | 48+ |
| 40–49 | <27 | 27–35 | 36–44 | 45+ |
| 50–59 | <24 | 24–32 | 33–41 | 42+ |
| 60+ | <21 | 21–29 | 30–38 | 39+ |
| Age Group | Female — Below Avg | Female — Average | Female — Good | Female — Excellent |
|---|---|---|---|---|
| 20–29 | <26 | 26–34 | 35–43 | 44+ |
| 30–39 | <24 | 24–32 | 33–41 | 42+ |
| 40–49 | <22 | 22–29 | 30–38 | 39+ |
| 50–59 | <20 | 20–27 | 28–35 | 36+ |
| 60+ | <18 | 18–25 | 26–33 | 34+ |
| 400m Time (freestyle) | Swim VO2 Max | Run Equivalent | Fitness Category |
|---|---|---|---|
| Under 4:30 | 58+ | 66+ | Elite |
| 4:30–5:00 | 52–57 | 59–65 | Excellent |
| 5:00–6:00 | 43–51 | 49–58 | Good |
| 6:00–7:00 | 37–42 | 42–48 | Average |
| 7:00–8:30 | 29–36 | 33–41 | Below Average |
| Over 8:30 | <29 | <33 | Poor |
| Stroke | Speed Factor | VO2 Max Adjustment | Notes |
|---|---|---|---|
| Freestyle (Front Crawl) | 100% (baseline) | No adjustment | Most efficient; standard for testing |
| Backstroke | ~90% | −5 to 8% | Similar efficiency to freestyle |
| Butterfly | ~85% | −8 to 12% | High effort; not ideal for test |
| Breaststroke | ~75% | −15 to 20% | Least efficient; slowest stroke |
VO2 max is measured in millilitres of oxygen for every kilo of body mass in one minute. If the value of VO2 max is higher that shows that the body can take in and use more oxygen. Top swimmers commonly reach levels between 66 and 80 mL O2/kg/min.
DISCLOSURE: This post may contain affiliate links, meaning when you click the links and make a purchase, I receive a commission. As an Amazon Associate I earn from qualifying purchases.
Swimming helps to strengthen the heart system, because it uses several groups of muscles at the same time.
VO2 Max in Swimming and How to Improve It
To find the VO2 max speed during swimming, the middle pace from testing of 400 metres is useful. This speed works as a safe base for planning training for VO2 max. For instance, a solid session for building the top aerobic skill is made up of swimming of 10 rounds each 200 metres with 60 seconds of pause at 96% of the 400-metre speed, or 20 rounds each 100 metres with 15 to 30 seconds of rest at 95% of the 200-metre speed.
Interval efforts at the lactate threshold commonly are called “efforts for VO2 max”. If you work at that intensity during some minutes one after the other, with enough rest to keep the whole series, that can help improve the pace at the aerobic ceiling and push VO2 max more upward. The level of felt efforts for such work usually reaches 6 to 7 out of 10, close to 7. Swimmers can swim a bit more quickly at this level of efofrt.
Swimmers from the elite can keep the top aerobic power for around 215 to 260 seconds. Swimmers of high level last between 230 and 260 seconds, while those of lower level can stretch it to 310 to 325 seconds. A test for VO2 max is seen as ended, when the intake of oxygen levels off, the heart rhythm reaches its peak, the breathing exchange ratio passes 1.15 and the swimmer feels fully worn out.
Two kinds of endurance training work help to build the aerobic base. They use more modest efforts, that eases rest and prepares for bigger loads in future. It is worth thinking about using ideas from cycling in swimming, for instance, spend two weeks at VO2 max work, then switch too threshold training and repeat the cycle.
VO2 max splits into two parts: the central part, that forms the ability of the body to deliver oxygen to the working muscles, and the outer part, that depends on how well those muscles actually use the oxygen. During swimming, the outer system of the arm muscles commonly gets little attention. When one starts again after a period of swimming, the arms need time to recover their form.
Most smartwatches do not measure VO2 max from swimming. Garmin and Apple Watch only count it from land activities like running, walking or cycling. Signals of heart rhythm are unreliable in water, which hampers the rating.
Swimming depends much on style, so it hardly measures VO2 max compared to running. One can get a good guess through running, because VO2 max stays the same between different sports. There are apps for testing VO2 max in swimming, though it is like the old 12-minute swim test anddo not measure it as exactly as the current method.
