Running 1.5 miles in 12 minutes means a VO2 max of about 42.7
VO2 max (maximal oxygen uptake) is the most oxygen your body can use per minute for each kilogram of body weight during all-out exercise, measured in mL/kg/min. Measuring it exactly takes a lab, where you run to exhaustion while your breath is analyzed, but field tests such as the 12-minute run or the 1-mile walk give a reasonable estimate. If you cover 1.5 miles (2,414 m) in 12 minutes, the Cooper formula gives a VO2 max of 42.7 mL/kg/min, which puts a man aged 35 to 39 in about the top 29%.
This calculator estimates VO2 max from three tests (12-minute run, 1-mile walk, heart rate ratio), or you can type in a value from your watch and see where it ranks for your age and sex. Rank is computed by interpolating the Statistics Canada distribution for ages 8 to 69 (CHMS, 2016 to 2017) into percentiles, and the calculator also tells you how much your result would need to change to reach the next band. The sections below cover why VO2 max matters, the formula and test procedure for each method, age and sex reference tables, why methods disagree, how to raise it, and the limits of all this.
Why measure VO2 max
VO2 max summarizes cardiorespiratory fitness, the combined capacity of your heart, lungs and muscles, in one number. In the meta-analysis by Kodama and colleagues (2009), which pooled 33 cohort studies with about 100,000 people, each 1 MET (3.5 mL/kg/min) higher maximal exercise capacity went with a 13% lower risk of death from any cause and a 15% lower risk of coronary heart disease and cardiovascular events. In a 2016 scientific statement, the American Heart Association said cardiorespiratory fitness may predict death better than traditional risk factors such as smoking, high blood pressure, high cholesterol and type 2 diabetes, and proposed assessing it in clinical practice like a vital sign.
Good times to use this calculator: when you start exercising and want a number to start from, when you retest after a few months of training, or when your watch shows a VO2 max and you wonder how it compares with people your age. The result is not a diagnosis but a relative position among people of the same age and sex, so it is most useful for tracking change with the same method over time.
Three ways to estimate VO2 max, and their formulas
All three formulas were built by comparing field results with VO2 max measured in a lab. The results in the table are for a 35-year-old man.
| Method | Formula | Example | VO2 max |
|---|---|---|---|
| 12-minute run (Cooper, 1968) | (distance in m − 504.9) ÷ 44.73 | 1.5 mi (2,414 m) | 42.7 |
| 1-mile walk (Kline et al., 1987) | 132.853 − 0.0769 × weight (lb) − 0.3877 × age + 6.315 × sex (male 1, female 0) − 3.2649 × time (min) − 0.1565 × heart rate right after | 176 lb, 15 min 30 s, 125 bpm | 41.9 |
| Heart rate ratio (Uth et al., 2004) | 15.3 × max heart rate ÷ resting heart rate | Resting 65, max 185 bpm | 43.5 |
- 12-minute run: Cooper (1968) compared the distance 115 U.S. Air Force men ran in 12 minutes with their lab VO2 max, and the two correlated at 0.897.
- 1-mile walk: Kline and colleagues (1987) had 343 adults aged 30 to 69 (165 men, 178 women) walk one mile (1,609 m) as fast as possible. Weight goes in as pounds and time in minutes. It suits people who find running hard or are just starting to exercise.
- Heart rate ratio: Uth and colleagues (2004) showed in 46 well-trained men aged 21 to 51 that multiplying max heart rate divided by resting heart rate by 15.3 comes close to VO2 max. With a measured max heart rate the standard error of estimate was 2.7 mL/kg/min (about 4.5%); with a max heart rate estimated from age it grew to 4.7 mL/kg/min (about 7.8%). That is why the calculator accepts only a measured max heart rate.
If a watch or a fitness lab gave you a VO2 max, choose "Known value" to see only your rank among people of the same age and sex. For the 12-minute run, the calculator also shows predicted 5 km and 10 km times using Riegel's (1981) formula: 12 minutes × (target distance ÷ distance run)^1.06.
How to do each test
- 12-minute run: Warm up for at least 10 minutes somewhere you know the distance exactly, such as a 400 m track (about a quarter mile), then run as far as you can in 12 minutes. Starting too fast leads to a big slowdown later, so settle on a steady pace you can hold to the end. Add up the laps (each 400 m, or 0.25 mi) plus the partial last lap.
- 1-mile walk: Walk one flat mile (1,609 m, which is 4 laps of a 400 m track plus 9 m) as fast as you can without running. The moment you finish, count your pulse for 15 seconds and multiply by 4, or read it off a heart rate monitor. Heart rate falls quickly after about a minute, so measure right away.
- Heart rate ratio: Measure resting heart rate lying down for one minute on waking, before getting up. For max heart rate use a value from an exercise stress test, or the highest reading on a heart rate monitor after a thorough warm-up and several hard uphill sprints.
Stop at once if you feel chest pain, dizziness or unusual shortness of breath. If you have a medical condition or have not exercised for a long time, talk with a doctor before any all-out test.
VO2 max reference table by age and sex
The table below shows the VO2 max distribution Statistics Canada estimated with a step test (mCAFT) in the Canadian Health Measures Survey (CHMS, 2016 to 2017). P20 is the 20th value if you line up 100 people from lowest to highest, P50 is the middle value and P80 is the 80th. The calculator joins 11 values from P5 to P95 to interpolate the percentile of your value.
| Age | Men P20 | Men median | Men P80 | Women P20 | Women median | Women P80 |
|---|---|---|---|---|---|---|
| 18–19 years | 42.9 | 48.0 | 53.4 | 38.7 | 41.7 | 45.1 |
| 20–24 years | 40.9 | 46.4 | 52.2 | 37.3 | 40.2 | 43.4 |
| 25–29 years | 38.1 | 43.8 | 49.8 | 35.2 | 38.3 | 41.7 |
| 30–34 years | 35.6 | 41.1 | 47.0 | 32.8 | 36.3 | 40.2 |
| 35–39 years | 33.7 | 38.9 | 44.4 | 30.4 | 34.3 | 38.7 |
| 40–44 years | 32.3 | 37.3 | 42.5 | 28.1 | 32.3 | 36.9 |
| 45–49 years | 30.8 | 35.6 | 40.7 | 26.0 | 30.3 | 35.0 |
| 50–54 years | 28.4 | 33.2 | 38.3 | 24.1 | 28.3 | 33.0 |
| 55–59 years | 25.5 | 30.3 | 35.3 | 22.4 | 26.4 | 30.9 |
| 60–64 years | 23.0 | 27.3 | 31.9 | 20.8 | 24.7 | 28.9 |
| 65–69 years | 20.9 | 24.5 | 28.3 | 19.4 | 23.0 | 27.0 |
The same value ranks very differently by age and sex. Here is where a VO2 max of 42.4 lands, as the calculator computes it.
| Comparison group | Rank | Band |
|---|---|---|
| Men aged 25–29 | about the top 58% | Middle 40–60% |
| Men aged 35–39 | about the top 30% | Top 20–40% |
| Men aged 45–49 | about the top 13% | Top 20% |
| Women aged 25–29 | about the top 17% | Top 20% |
| Women aged 45–49 | top 5% | Top 20% |
VO2 max and predicted times by 12-minute distance
For each distance covered in 12 minutes, the table gives the VO2 max from the Cooper formula, the MET equivalent, and 5 km and 10 km times converted with the Riegel formula.
| 12-minute distance | VO2 max | MET | 5 km | 10 km |
|---|---|---|---|---|
| 1.00 mi (1,609 m) | 24.7 | 7.1 | 39:54 | 1:23:12 |
| 1.25 mi (2,012 m) | 33.7 | 9.6 | 31:30 | 1:05:41 |
| 1.50 mi (2,414 m) | 42.7 | 12.2 | 25:58 | 54:08 |
| 1.75 mi (2,816 m) | 51.7 | 14.8 | 22:03 | 45:58 |
| 2.00 mi (3,219 m) | 60.7 | 17.3 | 19:08 | 39:54 |
In the Cooper formula, every extra 45 m (about 0.028 mi) in 12 minutes adds 1 mL/kg/min of VO2 max. The predicted times stretch your 12-minute speed over a longer distance, so the longer the race, the more the real time can differ, and if you do not usually run long distances you will often finish slower than predicted.
Why the methods give different numbers
Even one person can get slightly different values from the three tests, because each formula was built on a different group: U.S. Air Force men for Cooper, general adults aged 30 to 69 for Kline and well-trained men for Uth. People used to running tend to score relatively high on the run, and people with years of walking tend to score relatively high on the walk test.
The reference distribution has the same issue. It is a Canadian step-test estimate, so it does not line up one to one with a value from a different test. Use the rank to see roughly which band you are in, and to track change, retest with the same method, on the same course and at a similar time of day. Watch VO2 max values also differ by device, so compare only readings from the same device.
How to raise your VO2 max
Milanović and colleagues (2015) analyzed 28 controlled studies with 723 healthy adults aged 18 to 45. Compared with people who did not exercise, endurance training raised VO2 max by 4.9 mL/kg/min on average and high-intensity interval training (HIT) by 5.5 mL/kg/min. Lower starting fitness and longer programs tended to give larger gains.
The World Health Organization 2020 guidelines recommend that every adult do 150 to 300 minutes of moderate-intensity aerobic activity a week, or 75 to 150 minutes of vigorous activity, or an equivalent mix. The "To the next band" row in the calculator shows how many more meters or miles you would need in 12 minutes, how many seconds faster the mile walk, or how many bpm lower your resting heart rate, to move up one band, which makes a handy training target.
What U.S. physical activity guidelines say
The Physical Activity Guidelines for Americans, 2nd edition, from the U.S. Department of Health and Human Services, put it this way in its Executive Summary: "For substantial health benefits, adults should do at least 150 minutes (2 hours and 30 minutes) to 300 minutes (5 hours) a week of moderate-intensity, or 75 minutes (1 hour and 15 minutes) to 150 minutes (2 hours and 30 minutes) a week of vigorous-intensity aerobic physical activity, or an equivalent combination of moderate- and vigorous-intensity aerobic activity."
The same guidelines say that "additional health benefits are gained by engaging in physical activity beyond the equivalent of 300 minutes (5 hours) of moderate-intensity physical activity a week," and that adults should also do muscle-strengthening activities of moderate or greater intensity that involve all major muscle groups on 2 or more days a week. These amounts match the WHO range above, so you can use either as a weekly target alongside this calculator's results.
Common mistakes
- Entering a result from an easy effort: All three formulas assume maximal effort. A relaxed run or walk lowers the VO2 max you get.
- Running during the walk test: Entering a time from running makes the time shorter and the VO2 max higher than it really is.
- Taking heart rate late after the walk: If your heart rate falls while you rest, the formula returns a higher VO2 max. Measure the moment you stop.
- Using 220 minus age for max heart rate: An age-based max heart rate varies a lot from person to person and adds error. The calculator accepts only a measured value.
- Comparing values from different methods: Comparing last month's watch reading with this month's 12-minute run can make a difference in method look like a difference in fitness.
Limits
- Each formula was built on a particular group (U.S. Air Force men, adults aged 30 to 69, well-trained men), so errors can be larger for other people.
- The reference distribution is a step-test estimate for Canadians aged 8 to 69. It does not line up one to one with U.S. data or other test methods, and no rank is shown for ages 70 and over.
- Ages 8 to 17 are outside the studies behind the formulas, so treat those results as rough, and the walk test is calculated only for ages 18 and over.
- Predicted 5 km and 10 km times are converted from a 12-minute run and ignore course, weather and training status.
- The result is not a health diagnosis. If you have a medical condition or symptoms, talk with a doctor before an all-out test.
Last checked The formulas, study results, the Canadian CHMS distribution, the WHO recommendation and the U.S. guideline text were checked against the original sources listed below on October 16, 2026. Table numbers are this calculator's own results, and figures such as 1.5 mi are examples.
Sources
- 01Cooper KH: A Means of Assessing Maximal Oxygen Intake (JAMA, 1968)115 U.S. Air Force men, correlation of 12-minute run distance with VO2 max of 0.897
- 02Kline GM et al.: Estimation of VO2max from a one-mile track walk, gender, age, and body weight (Med Sci Sports Exerc, 1987)343 adults aged 30 to 69; walk time, heart rate over the last quarter mile, age, weight, sex
- 03Uth N et al.: Estimation of VO2max from the ratio between HRmax and HRrest (Eur J Appl Physiol, 2004)46 well-trained men, coefficient 15.3, standard error of estimate 2.7 mL/kg/min
- 04Statistics Canada: Hoffmann MD et al., Normative-referenced percentile values for physical fitness among Canadians, Table 2 (Health Reports, 2019)CHMS 2016 to 2017, mCAFT VO2 max, men and women aged 8 to 69, P5 to P95
- 05Riegel PS: Athletic records and human endurance (American Scientist, 1981)Time conversion exponent 1.06
- 06Kodama S et al.: Cardiorespiratory fitness as a quantitative predictor of all-cause mortality and cardiovascular events (JAMA, 2009)33 studies, hazard ratio 0.87 per 1 MET higher
- 07Ross R et al.: Importance of Assessing Cardiorespiratory Fitness in Clinical Practice (Circulation, 2016, AHA scientific statement)Cardiorespiratory fitness as a clinical vital sign
- 08Milanović Z et al.: Effectiveness of High-Intensity Interval Training (HIT) and Continuous Endurance Training for VO2max Improvements (Sports Med, 2015)28 studies, 723 people, endurance +4.9 and HIT +5.5 mL/kg/min
- 09Bull FC et al.: World Health Organization 2020 guidelines on physical activity and sedentary behaviour (Br J Sports Med, 2020)Adults: 150 to 300 minutes of moderate or 75 to 150 minutes of vigorous activity a week
- 10U.S. Department of Health and Human Services: Physical Activity Guidelines for Americans, 2nd edition, Executive Summary (2018)Key Guidelines for Adults: 150 to 300 minutes moderate or 75 to 150 minutes vigorous a week
Frequently asked questions
What is an average VO2 max?
It depends on age and sex. In the Canadian CHMS 2016–17 distribution the median is 41.1 mL/kg/min for men and 36.3 for women aged 30 to 34, and 33.2 for men and 28.3 for women aged 50 to 54. The median falls as people get older.
Is a VO2 max of 40 good?
The same 40 puts a man aged 35 to 39 in about the top 44%, around the middle, a woman aged 35 to 39 in about the top 15%, and a man aged 55 to 59 in about the top 6%. Enter your age and sex and the calculator works out your rank right away.
Should I do the 12-minute run or the 1-mile walk?
If you can keep running for 12 minutes, the 12-minute run is the simpler test. If running is hard or you are just starting to exercise, the 1-mile walk with a heart rate reading right after you finish is easier on the body. To track change, always retest with the same method.
Can I use 220 minus my age if I do not know my max heart rate?
That is not recommended. In the Uth et al. (2004) study, a measured max heart rate gave a standard error of estimate of 2.7 mL/kg/min, but a max heart rate estimated from age raised it to 4.7 mL/kg/min. So the calculator accepts only a measured max heart rate. If you do not have one, use the 12-minute run or the 1-mile walk.
Can I compare the VO2 max shown on my watch here?
Yes. Choose Known value under Method and enter the watch reading to see where it ranks among people of your age and sex. Watches estimate VO2 max differently and can differ from lab values, so it is better to follow changes in readings from the same device.
How much can VO2 max be raised?
In an analysis of 28 studies by Milanović et al. (2015), endurance training raised VO2 max by 4.9 mL/kg/min and high-intensity interval training by 5.5 mL/kg/min compared with people who did not exercise. Lower starting fitness and longer programs tended to give larger gains.
Why compare with Canadian data?
It is a national sample with VO2 max percentiles from P5 to P95 by sex and age that can be used under open terms. The values are estimated from a step test and the country differs, so treat the result as a rough position rather than a diagnosis.
How reliable are the predicted 5 km and 10 km times?
They stretch your 12-minute running speed to a longer distance using the Riegel formula (exponent 1.06). 5 km is relatively close, but the longer the distance, as with 10 km, the more the real time can differ, and if you do not usually run long distances you will often finish slower than predicted.