Running VO2 Max Estimator
Estimate your VO2 max from a recent run using pace and heart rate data.
Understand your aerobic fitness level.
VO2 max (maximal oxygen uptake) is the gold standard measure of cardiovascular fitness. It measures the maximum rate at which your body can consume oxygen during exercise, expressed in milliliters of oxygen per kilogram of body weight per minute (mL/kg/min).
Why VO2 max matters: A higher VO2 max means your cardiovascular system delivers more oxygen to muscles, allowing you to sustain faster speeds for longer periods. Elite marathon runners typically have VO2 max values of 70–85 mL/kg/min; average adults are 35–50.
VO2 max fitness categories (general population):
| Category | Women (mL/kg/min) | Men (mL/kg/min) |
|---|---|---|
| Very poor | Under 28 | Under 32 |
| Poor | 28–34 | 32–38 |
| Below average | 34–38 | 38–42 |
| Average | 38–42 | 42–48 |
| Above average | 42–46 | 48–52 |
| Good | 46–52 | 52–58 |
| Excellent | 52–60 | 58–66 |
| Elite | Over 60 | Over 66 |
The estimation method used here: This calculator uses the Jack Daniels’ VDOT formula, which estimates VO2 max from a recent race or time trial:
VDOT ≈ (-4.60 + 0.182258 × v + 0.000104 × v²) / (0.8 + 0.1894393 × e^(-0.012778 × t) + 0.2989558 × e^(-0.1932605 × t))
Where v = velocity in m/min and t = time in minutes.
For estimation from heart rate: VO2 max ≈ 15 × (HRmax / HRrest)
How to improve VO2 max:
- High-intensity interval training (HIIT): 4–8 × 2–4 minute intervals at near-maximal effort — the most effective method
- Tempo runs: Sustained effort at the “comfortably hard” lactate threshold pace
- Long slow distance: Builds aerobic base and cardiac efficiency
- Consistency: VO2 max improves most with regular training — 3–5 sessions per week minimum
VO2 max is partly genetic but can improve 15–30% with consistent training.