VO2 Max Estimator

What Is VO2 Max?

VO2 max is the maximum rate your body can take in and use oxygen during hard exercise, measured in milliliters of oxygen per kilogram of body weight per minute (mL/kg/min). It is the gold-standard measure of cardiorespiratory fitness and is a strong predictor of all-cause mortality and long-term health. A lab treadmill test is the most accurate, but field tests like Rockport and Cooper give a solid estimate.

Rockport 1-Mile Walk Test

Rockport is the easier and safer option — walk one mile as fast as you can, then record your time in minutes and your heart rate at the finish. VO2 max = 132.853 − (0.1692 × weight in kg) − (0.3877 × age) + (6.315 × sex, where male = 1 and female = 0) − (3.2649 × time in minutes) − (0.1565 × heart rate in bpm). It works well for beginners and older adults who cannot sustain a run.

Cooper 12-Minute Run Test

Cooper is the classic athlete test — run as far as possible in 12 minutes on a flat track, then enter the distance in meters. VO2 max = (distance in meters − 504.9) / 44.73. It is more accurate for regular runners but requires a hard sustained effort, so warm up properly and skip it if you have heart disease, uncontrolled blood pressure, or recent injury.

Important Safety Note

This calculator is informational only and is not medical advice. If you are sedentary, over 40, or have any cardiovascular risk factors, talk to your clinician before maximal exertion tests. Stop immediately if you feel chest pain, severe shortness of breath, or dizziness. Field-test VO2 max is an estimate — expect ±10% variation versus a lab test.