health · 2026-05-01
Estimate VO2 max from a 12-minute Cooper test or 1.5-mile time trial — with age-graded fitness classification.
| Test method | Cooper 12-min run (meters) |
| 12-min run distance (meters) | 2,800 |
| 1.5-mile time (total minutes, decimals OK) | 11.5 |
| Age | 35 |
| Sex | Male |
| METs equivalent | 14.7 |
| Age-graded score (50 = age-average) | 61.1 |
VO2 max is the maximum volume of oxygen your body can transport and utilize per minute, normalized to bodyweight (ml/kg/min). It's the single best predictor of cardiovascular health and a strong predictor of all-cause mortality.
(meters - 504.9) / 44.733.5 + (483 / minutes)Both are accurate within ±10% of true lab-measured VO2 max for fit individuals. The Cooper test is the reference standard for the US military and is more reliable across fitness levels.
| Age | Excellent (M) | Avg (M) | Excellent (F) | Avg (F) | |---|---|---|---|---| | 20-29 | 55+ | 45 | 49+ | 38 | | 30-39 | 52+ | 41 | 46+ | 35 | | 40-49 | 48+ | 37 | 42+ | 32 | | 50-59 | 45+ | 33 | 39+ | 28 | | 60-69 | 42+ | 29 | 35+ | 25 |
A 30-year-old man with 41 ml/kg/min is average; 52+ is excellent. Elite endurance athletes hit 70-90.
VO2 max is inversely correlated with all-cause mortality. A 2018 JAMA study tracked 122,000 patients: those in the lowest VO2 max quartile had 5× the mortality risk of those in the highest, larger than the effect of smoking or hypertension. Cardiorespiratory fitness is medicine.
Within ±10% of treadmill VO2 max testing for the average person. It overestimates for sprinters with anaerobic capacity (you can run hard for 12 min on glycolytic energy, not just aerobic). Repeat the test every 6-8 weeks for trend tracking — the relative changes are more accurate than the absolute number.
Mostly heart-related: max heart rate drops ~1 bpm/year, so cardiac output ceiling drops too. Stroke volume can be preserved with training. Trained 60-year-olds often have VO2 max in the 50s — same as untrained 30-year-olds. Aging is real but trainable for decades.
It's specific to running mechanics. Cyclists tend to score lower on running tests than their cycling VO2 max would predict, because they're not running-economical. For cycling-specific VO2, use a 20-min FTP test and a separate cycling power-to-weight conversion. Best: a lab test on the modality you train.
Within ±15% for most users, derived from heart rate response to running pace. Better than nothing, worse than a field test. Useful for trend tracking on the same device. Don't compare wearable VO2 max across brands — algorithms differ.