Health & Fitness
VO2 Max Estimator
Estimate your VO2 max using the Rockport 1-mile walk test or a quick non-exercise questionnaire. See your cardio fitness rating compared to age and gender norms. Free and private.
Choose a Test Method
Walk 1 mile (1609 m) as fast as you can on flat ground. Record total minutes + decimal.
Take pulse immediately at the finish line for 15 seconds × 4, or use a chest strap.
Rockport is one of the best validated field tests for the general population. Perform on a flat measured course.
What Is VO2 Max and Why Does It Matter?
VO2 max is the gold-standard measure of your body’s ability to transport and utilize oxygen during maximal exercise. Higher values are strongly correlated with lower all-cause mortality, better metabolic health, and greater athletic potential. It is one of the few fitness metrics that genuinely improves both performance and lifespan.
The Rockport Walk Test (Best Field Option)
Walk one mile (1.6 km) on flat ground as fast as you safely can. Record the exact time and your heart rate right at the finish. The formula has been validated against laboratory gas analysis in many studies. It requires no special equipment beyond a measured course and a way to measure heart rate.
Improving Your VO2 Max
- High-intensity intervals (Zone 5 work) 1–2× per week are the fastest way to raise it.
- Consistent Zone 2 volume builds the aerobic base that supports higher intensities.
- Strength training and losing excess body fat also move the needle.
- Expect 10–20% improvement in 3–6 months with smart training if you are currently untrained.
Frequently Asked Questions
How accurate are these VO2 max estimates?
The Rockport 1-mile walk test is validated within ~5% of lab values for most adults. Non-exercise estimates are less precise but useful for tracking direction over time.
What is a good VO2 max for my age?
It varies widely. “Superior” for a 30-year-old male is roughly 55+ ml/kg/min. For a 55-year-old female, 35+ is already excellent. Use the category table shown in the results.
Is my personal fitness data secure?
Yes. All calculations and results are computed entirely client-side in your browser. None of your inputs (such as weight, age, gender, or heart rate) are sent to or stored on any external servers.