How is VO2max estimated from a 2K erg time?

The tool converts your average 500m split into mechanical power using Concept2's published power formula, then applies their power-to-VO2 relationship. Dividing by bodyweight gives VO2max in ml/kg/min.

Is this as accurate as a lab gas-analysis test?

No. A graded test on a metabolic cart measures oxygen uptake directly and is the gold standard. This estimate assumes typical rowing economy and can be off by several points, so use it to track changes rather than as an exact value.

Why does bodyweight matter?

VO2max is normally expressed relative to bodyweight (ml/kg/min). The same erg power produces a higher relative VO2max for a lighter rower, which is why two people with identical 2K times can have different scores.

What is a good rowing VO2max?

Roughly, 45+ ml/kg/min is good for a recreational rower, 52+ is excellent, and elite oarsmen often exceed 60. Bands are general and vary with age and sex.

Should I be fully rested before the test?

Yes. A true 2K is a maximal effort. Estimate from a fresh, well-paced personal best, not from a fatigued or paced-conservatively piece, or the result will understate your fitness.

Rowing VO2max Estimator

Estimate your aerobic ceiling from a single 2K

VO2max is the maximum rate at which your body can take in and use oxygen, and it is one of the strongest predictors of endurance rowing performance. A laboratory test is expensive and rarely available, but the indoor rower gives a precise mechanical measurement — your average power over a 2000m piece — that maps closely onto aerobic demand. This tool turns your 2K time into an estimated VO2max in ml/kg/min.

How it works

A Concept2 erg reports a 500m split, which corresponds to a power output through the manufacturer’s published formula:

watts = 2.80 / pace^3

where pace is your average pace in seconds per metre (your average 500m split divided by 500). The tool first derives your average split across the whole 2000m, then computes average watts. Mechanical power is converted to oxygen demand using Concept2’s power-to-VO2 relationship:

VO2 (L/min) = (watts * 14.4 + 65) / 1000
VO2max (ml/kg/min) = VO2(L/min) * 1000 / bodyweight(kg)

Because VO2max is reported relative to bodyweight, a lighter rower with the same power scores higher — this is why the tool needs your mass as well as your time.

Tips and notes

Test only when fully rested and warmed up, and pace the 2K evenly: a blowout in the first 500m wrecks your average power and undersells your fitness. Because the estimate assumes typical rowing economy, treat the number as a benchmark to beat over a training block rather than an exact physiological value. If you have access to a real graded test, use that for your zones and reserve this estimator for quick, frequent progress checks between formal assessments.

Rowing VO2max Estimator

Email me this result

Estimate your aerobic ceiling from a single 2K

How it works

Tips and notes