VO₂ Max Estimator

🫁 VO₂ Max Estimator (Rockport Walking Test)

Estimate your cardiovascular fitness — a key longevity marker — from a simple 1‑mile walk.
🏃 How to perform the Rockport Walking Test:
1. Walk 1 mile (1.6 km) as fast as you can without jogging.
2. Immediately after finishing, measure your heart rate (count beats for 15 seconds × 4).
3. Record your time in minutes and seconds.
4. Enter your details below.
No running. Just a brisk, continuous walk. A flat, measured course works best.
kg
lbs
min
bpm
38.5
mL/kg/min
Good
For a 30‑year‑old female, a VO₂ max of 38.5 ranks in the “Good” category — above the 50th percentile for your age and gender.
🧭 Got your VO₂ max? Now see how your strength compares — find your estimated max lifts, adjusted for age. Check your 1‑Rep Max →
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This calculator uses the Rockport Walking Test formula. Results are estimates. For a precise VO₂ max measurement, consult an exercise physiologist for a graded exercise test.
Author: Dr. Shirley Cheung | © theshirlshirl.com — Smart tools for real life.

What Is VO₂ Max and Why Does It Matter?

VO₂ max is the maximum amount of oxygen your body can use during intense exercise. It’s one of the strongest predictors of longevity and cardiovascular health. This calculator uses the Rockport Walking Test — a validated submaximal field test that estimates VO₂ max from a 1‑mile brisk walk, your heart rate at the end, and your age/weight/gender.

Unlike a lab test (which costs hundreds of dollars and requires a treadmill and mask), the Rockport test can be done on any flat path with a stopwatch. It’s not perfect, but it’s a reliable, repeatable benchmark you can track over time.

Pair this with your Heart Rate Zones to train at the right intensity for improving your score.