VO2 Max Calculator
Estimate rowing VO2 max from a maximal 2,000m test, body weight and training level. Uses the equations published by Concept2. Keep the estimate beside your actual time when tracking aerobic progress.
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How do you estimate VO2max from rowing?
A rowing VO2 max calculator estimates aerobic capacity from a maximal 2,000m test. This tool uses the published Concept2 equations with your body weight and training level. It first estimates oxygen use in litres per minute, then divides by weight to give ml/kg/min. The result is a field estimate, not a laboratory measurement or a guaranteed fitness rating.
Your test
Choose the category used by the published equation. The model provides male and female coefficients only.
Choose the training population described in the FAQ below.
Test summary
Estimated VO2max
ml/kg/min
Enter a valid 2k time and body weight. This result may fall outside the model.
Method
Average power
This is an estimate from a maximal 2,000m test. Body weight and training category affect the result. Laboratory gas analysis is needed to measure oxygen uptake directly.
What changes a rowing VO2 max estimate?
VO2 max describes aerobic capacity: the maximum rate of oxygen use during intense exercise. A rowing calculator estimates it from a performance test. It does not measure oxygen directly. Compare repeated tests under similar conditions, and keep the original rowing time beside the estimate so a change remains easy to interpret.
VO2 max is also called maximal oxygen uptake. This indoor rowing estimate uses the full rowing time for 2,000 metres. Enter rowing time as minutes and seconds, not your 500m pace. VO2 max describes one part of cardiovascular fitness. Compare your VO2 max estimate only when the rowing time, body weight and training category have been recorded consistently.
| Measurement | Unit | Meaning |
|---|---|---|
| Absolute oxygen uptake | Litres per minute | Total estimated oxygen use |
| Relative VO2 max | ml/kg/min | Oxygen use divided by body weight |
| Average power | Watts | Mechanical power on the rowing machine |
| Laboratory VO2 max | Measured gas exchange | A direct exercise test with specialist equipment |
The Concept2 equations depend on body weight, a maximal 2,000m time and training level. They can change abruptly at the published weight thresholds. An ordinary training piece is not a maximal test. This page does not assign a clinical fitness rating or promise a fixed error margin.
Turn your actual test time into a split with the erg pace calculator to track performance independently of the estimate.
Use the training pace calculator for provisional session paces rather than treating VO2 max as a complete training plan.
For weight correction of the result itself, use the bodyweight-adjusted erg calculator which answers a different question from aerobic capacity.
Method and further reading: Concept2 VO2max equations and limitations
Worked example
A 75 kg rower using the highly trained male equation completes 2,000m in 6:50.0.
- 1.Convert the full rowing time to minutes: 410 / 60 = 6.8333.
- 2.At 75 kg or below, the coefficient is 15.1.
- 3.Estimated oxygen use = 15.1 - (1.5 x 6.8333) = 4.85 litres per minute.
- 4.Relative VO2 max = 4.85 x 1,000 / 75 = 64.7 ml/kg/min.
This is the model output for those inputs. It is not a verified lab result or an elite classification.
How the estimate works
What VO2max is, and why rowers care
VO2 max is the maximum rate at which your body uses oxygen during intense exercise. Relative VO2 max divides oxygen uptake by body weight and is expressed in ml/kg/min. It describes aerobic capacity, but rowing performance also depends on technique, pacing and the effort you can sustain.
The published Concept2 2k equations
Let T be the full 2,000m time in minutes and Y be estimated oxygen uptake in litres per minute. For highly trained men, Y = 15.1 - 1.5T at 75 kg or below, and Y = 15.7 - 1.5T above 75 kg. For highly trained women, the constants are 14.6 at 61.36 kg or below and 14.9 above that weight. Finally, VO2 max = Y x 1,000 / weight in kg.
The not-highly-trained equations
For the other training category, the male equation is Y = 10.7 - 0.9T and the female equation is Y = 10.26 - 0.93T. Convert Y to ml/kg/min using body weight. These are separate fitted equations, so switching category can create a jump. Average watts are shown separately and do not determine VO2 max in this calculator.
How accurate is the estimate?
A prediction equation cannot measure your oxygen uptake. The original data, training category, technique and test effort affect how well it applies to you. Weight thresholds create discontinuities in the highly trained equations. Repeat comparable tests to follow a trend, and use laboratory testing when an actual physiological measurement is needed.
Use this with the other Row HQ tools
Use a completed longer test in the 2k prediction calculator when you need a provisional 2k target. Use your actual 2k split in the training pace calculator. The rowing pace chart compares split time across distances.
The rowing to running converter uses a separate illustrative model, not these VO2 max equations. The data-driven training guide explains how to keep test results useful across a season.
Frequently asked questions
How does this rowing VO2 max calculator work?
It uses the equations published by Concept2, based on rowing tests and laboratory gas analysis collected by Dr Fritz Hagerman. Enter a maximal 2,000m time, body weight and the relevant model category. The output is an estimate of relative oxygen uptake, expressed in ml/kg/min.
What does highly trained mean in this model?
Concept2 describes rowers who have trained regularly for several years, typically at least four days per week, with varied sessions and improving scores. Recreational rowing without regular hard pieces fits the other option more closely. The two equations describe different source populations, so changing this choice can change the result substantially.
Why does the formula use male and female categories?
The published equations use separate male and female datasets and body-weight thresholds. Choose the model category you intend to compare with. These coefficients are limitations of the available model; they are not a complete description of an individual's physiology or identity.
Can I use a 5k or a 30-minute result?
Not in this model. The published equations use a maximal 2,000m test. A longer piece gives useful training information, but entering its time here would apply the wrong relationship. Use the pace and prediction tools separately, and keep estimated results distinct from a completed 2k test.
Is this as accurate as a laboratory VO2 max test?
No. A lab measures oxygen uptake directly during an exercise protocol. This calculator estimates it from performance and body weight. Technique, fatigue and differences from the original test population affect the result. There is no guaranteed individual error margin.
Does a higher estimate mean I will win a race?
No. Aerobic capacity is one part of performance. Sustainable power, technique, pacing and the conditions of the race also matter. Use repeated tests to follow a trend, and keep the raw rowing time alongside the estimate.
Sources
Equations checked against the linked primary source on 22 September 2026.
- Concept2 VO2max calculator: equations, training-level definitions and model limitations.
- Concept2 watts calculator: the pace-to-power equation used for the separate watts display.
For one rower VO2max is a sum. For a squad of thirty it needs a system.
Thirty rowers through a winter base block means every 2k and 6k logged, dated and trended before any of it tells you much. Row HQ keeps that together in coach tools and training session tracking. Pair the VO2max estimate with the training pace calculator and each rower gets zone splits set individually, with no shared spreadsheet to maintain.
More rowing tools
2k Prediction Calculator
Predict your 2k time from 5k, 6k or 30-minute test results.
Training Pace Calculator
UT2, UT1, AT, TR and AN zone paces from your 2k.
Erg Score Calculator
Compare raw, weight-adjusted and illustrative age-adjusted scores.
Bodyweight-Adjusted Erg Score
Compare lightweight and heavyweight 2k times fairly.