VO2 Max Calculator
Estimate running VO2 max from a recent race performance and see how the result fits into practical runner fitness bands.
Fitness Bands
| Band | VO2 max | Running context |
|---|
How this VO2 max estimate works
This calculator uses a race-performance method commonly associated with Jack Daniels' running formulas. It estimates the oxygen demand of your average race speed, adjusts for how long you held that effort, and reports the implied VO2 max in ml/kg/min.
Use a recent race or time trial where you ran close to your best effort. Results are most useful when the course, weather, pacing, and surface were normal for you.
Limitations
This is a running fitness estimate, not a lab test or medical diagnosis. Heat, hills, altitude, fatigue, poor pacing, injury, and unusually short or long races can shift the number. For health decisions or clinical VO2 max testing, use a qualified professional.