VO2 max is the gold standard measure of aerobic fitness — it tells you how efficiently your body uses oxygen during intense exercise. Elite marathon runners have VO2 max values above 70 ml/kg/min, while the average untrained adult sits around 35–45. Use our free VO2 Max Calculator to estimate yours without a lab test.
VO2 Max Calculator
VO2 Max Calculator
What Is VO2 Max?
VO2 max (maximal oxygen uptake) is the maximum rate at which your body can consume oxygen during exhaustive exercise. It's measured in milliliters of oxygen per kilogram of body weight per minute (ml/kg/min). Higher VO2 max = better cardiovascular fitness and endurance performance.
VO2 Max Fitness Ratings by Age
| Rating | Men (ml/kg/min) | Women (ml/kg/min) |
|---|---|---|
| Superior | 60+ | 55+ |
| Excellent | 55–59 | 50–54 |
| Good | 45–54 | 40–49 |
| Average | 35–44 | 30–39 |
| Poor | 25–34 | 20–29 |
| Very Poor | <25 | <20 |
Cooper 12-Minute Run Test – How to Do It
- Find a flat track (400m running track is ideal)
- Warm up for 5–10 minutes with light jogging
- Run as far as you can in exactly 12 minutes
- Record the distance in meters
- Enter it in the calculator above
Formula: VO2 Max = (Distance in meters − 504.9) ÷ 44.73
How to Improve Your VO2 Max
- Interval training: 4×4 minute high-intensity intervals with 3-minute rest is proven to raise VO2 max by 5–10% in 8 weeks
- Long slow runs: Build aerobic base with 60+ minute zone 2 runs
- Consistency: 3–5 cardio sessions per week yields measurable improvement within 6–8 weeks
- Lose weight: VO2 max is per kg — even modest fat loss improves your score
Frequently Asked Questions
What is a good VO2 max?
For men, a VO2 max above 45 ml/kg/min is considered good. For women, above 40 ml/kg/min is good. Elite endurance athletes typically have values of 65–85+.
Can VO2 max be improved with age?
VO2 max naturally declines about 1% per year after age 25. However, regular aerobic training can slow this decline significantly and keep your fitness level well above age-matched sedentary individuals.
Is the Cooper Test accurate?
The Cooper Test is a validated field test with a correlation of r = 0.897 with lab-measured VO2 max in trained individuals. It's less accurate for untrained people or those with poor pacing strategy.