Rockport 1-Mile Walk Test VO2 Max Calculator

Understanding the Rockport 1-mile walk test — concept and principle

The Rockport walk test estimates VO2 max, your maximal oxygen uptake in mL/kg/min, from a single brisk walk of one mile (1.609 km). Because nobody has to run or reach exhaustion, it is popular for beginners, older adults and people returning to exercise,, and wherever a treadmill test is impractical.

The walk time is the biggest term: each minute faster adds about 3.3 points.

How it is calculated

Kline and colleagues (1987) derived a regression equation from measured VO2 max:

VO2 max = 132.853 − 0.0769 × weight(lb) − 0.3877 × age + 6.315 × sex − 3.2649 × time − 0.1565 × HR

Weight is entered in kg and converted to pounds (× 2.20462), because the original equation used pounds.
Sex is 1 for men and 0 for women.
Time is the minutes taken to walk the mile, written as a decimal (15 min 30 s = 15.5).
HR is your heart rate in bpm at the moment you finish.

The principle

Two facts drive the equation. First, a fitter person can walk the same distance faster. Second, at a given pace a fitter heart beats more slowly, because it delivers more oxygen per beat. Both a shorter time and a lower finishing heart rate therefore push the estimate up. Age and body weight adjust for the drop in VO2 max with age and for the fact that VO2 max is expressed per kilogram. The coefficients came from adults aged about 30 to 69, so the equation is most reliable in that group.

Worked example

Weight: 75 kg × 2.20462 = 165.35 lb, so 0.0769 × 165.35 = 12.715.
Age: 0.3877 × 35 = 13.570. Sex term for a man: +6.315.
Time: 3.2649 × 15.5 = 50.606. Heart rate: 0.1565 × 140 = 21.910.
VO2 max = 132.853 − 12.715 − 13.570 + 6.315 − 50.606 − 21.910 = 40.37 mL/kg/min.

Each point is the calculator re-run with only “Time for 1 mile (minutes, decimals)” changed; the gold point is the default example. Change the inputs above and this chart follows your numbers.

Time for 1 mile (minutes, decimals)	VO2 max (mL/kg/min)
3.88	78.32
7.75	65.67
11.6	53.02
15.5	40.37
19.4	27.72
23.2	15.06
31	-10.24

How to read the result

Each minute saved on the walk adds about 3.3 points, and each 10 bpm lower finishing heart rate adds about 1.6. Walking the same mile in 14.5 minutes at the same heart rate would give 43.63. For a 35-year-old man a value near 40 is roughly average; women typically score several points lower at the same age. Repeat the test on the same flat course every few months to see your progress.

Common mistakes

Strolling instead of walking as fast as you can; the equation assumes a maximal walking effort.
Reading your pulse a minute after finishing, when it has already dropped.
Jogging part of the distance.
Entering 15:30 as 15.3 instead of 15.5.

Keep in mind: The estimate carries an individual error of several mL/kg/min and is not a medical test or diagnosis. If you have heart disease, high blood pressure or chest symptoms, check with a doctor before any fitness test.

Frequently asked questions

Where should I do the test?

A standard 400 m running track is ideal: four laps plus 9 m is one mile. Any flat, measured route works too.

Is the Rockport test accurate for very fit people?

Fit people reach the end at a low heart rate and cannot walk much faster, so the test tends to underestimate high VO2 max values. A running test suits them better.

Can I use a chest strap or watch for the heart rate?

Yes. A chest strap reading taken right at the finish is the most reliable choice.

Sources: Kline GM, Porcari JP, Hintermeister R, et al. Estimation of VO2max from a one-mile track walk, gender, age, and body weight. Med Sci Sports Exerc 1987;19(3):253–259.

Checked 8 Nov 2026. Kline et al., Med Sci Sports Exerc 1987.

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