This VO2 max calculator estimates your maximal oxygen uptake widely regarded as the single best measure of aerobic fitness from a simple 12-minute run, a cycling effort, or your resting and maximum heart rate. Enter your numbers above to see your estimated VO2 max in mL/kg/min, then use the reference chart below to compare your score by age and sex. Because your result reflects your cardiorespiratory fitness, it is also one of the strongest predictors of long-term health.
Clinical Tools Library · Cardiorespiratory fitness
VO₂ Max Calculator & Aerobic Capacity Estimator
Estimate maximal oxygen uptake from a run, walk, cycling power or heart rate, then compare it against age- and sex-matched norms.
1 · Choose a method & enter your test
2 · Estimated VO₂ max
3 · Show the math & cross-check
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Fitness norms by age & sex
Approximate VO₂ max category boundaries (mL·kg⁻¹·min⁻¹), adapted from ACSM / Cooper Institute normative data and the FRIEND registry. Exact cut-points differ between reference systems, so treat these as an educational guide, not a diagnosis. The gauge above uses your age and sex to place your score.
| Age | Fair | Good | Excellent | Superior |
|---|---|---|---|---|
| 20–29 | 32 | 38 | 45 | 53 |
| 30–39 | 30 | 36 | 43 | 50 |
| 40–49 | 27 | 33 | 39 | 46 |
| 50–59 | 24 | 30 | 36 | 43 |
| 60+ | 21 | 27 | 33 | 39 |
| Age | Fair | Good | Excellent | Superior |
|---|---|---|---|---|
| 20–29 | 28 | 34 | 41 | 47 |
| 30–39 | 27 | 32 | 38 | 45 |
| 40–49 | 25 | 30 | 36 | 42 |
| 50–59 | 21 | 26 | 32 | 38 |
| 60+ | 19 | 24 | 30 | 36 |
Formulas used
12-minute run (Cooper)
VO₂max = (distance in metres − 504.9) ÷ 44.73 — Cooper (1968); correlation with lab testing ≈ 0.90.
1.5-mile (2 414 m) run
VO₂max = (483 ÷ time in minutes) + 3.5 — equivalent to applying the ACSM running equation to the 1.5-mile distance.
1-mile walk (Rockport / Kline)
VO₂max = 132.853 − 0.0769·weight(lb) − 0.3877·age + 6.315·sex − 3.2649·time(min) − 0.1565·HR (sex: male = 1, female = 0). Validated in adults 30–69; R ≈ 0.88.
Heart-rate ratio (Uth)
VO₂max ≈ 15.3 × (HR_max ÷ HR_rest). When not measured, HR_max is estimated as 208 − 0.7 × age (Tanaka), which carries ± ~10–12 bpm uncertainty.
Cycling peak power (Hawley–Noakes)
VO₂max (L/min) = 0.01141 × peak power(W) + 0.435, then ÷ body mass × 1000 → mL·kg⁻¹·min⁻¹. Derived in trained cyclists (r ≈ 0.97); a ramp test to exhaustion is assumed.
Velocity at VO₂ max & pace
speed(m/min) = (VO₂max − 3.5) ÷ 0.2 (ACSM level-running equation). Shown as vVO₂max / maximal aerobic speed and equivalent pace.
Other conversions
METs = VO₂max ÷ 3.5 · L/min = VO₂max × body mass(kg) ÷ 1000.
Sources & full disclaimer
Last reviewed: July 2026 · Published by clinicaltoolslibrary.com.
Primary references:
- Cooper KH. A means of assessing maximal oxygen intake. JAMA. 1968;203(3):201–204. PubMed 5694044.
- Kline GM, 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. PubMed 3600239.
- Uth N, Sørensen H, Overgaard K, Pedersen PK. Estimation of VO₂max from the ratio between HRmax and HRrest. Eur J Appl Physiol. 2004;91(1):111–115. PubMed 14624296.
- Hawley JA, Noakes TD. Peak power output predicts maximal oxygen uptake in trained cyclists. Eur J Appl Physiol. 1992;65(1):79–83. Springer / doi:10.1007/BF01466278.
- Ross R, et al. Importance of assessing cardiorespiratory fitness in clinical practice (AHA scientific statement). Circulation. 2016;134(24):e653–e699. ahajournals.org.
- Mandsager K, et al. Cardiorespiratory fitness and long-term mortality. JAMA Netw Open. 2018;1(6):e183605. jamanetwork.com.
Full disclaimer. This tool is an educational reference and decision aid for fitness and cardiorespiratory-health assessment. It does not diagnose, treat or give clinical recommendations, and it is not a substitute for professional judgement or a laboratory VO₂ max test with gas analysis. All estimates depend on the accuracy of the values you enter and the assumptions of each formula. Field tests requiring maximal effort carry cardiovascular risk; appropriate pre-exercise screening is advised. Higher VO₂ max is associated with lower mortality in population studies (see refs 5–6) but does not predict any individual's outcome. Confirm all figures against current labelling and guidance. Report suspected errors in this tool to the publisher; report exercise-related adverse events to your clinician and, where relevant, the appropriate authority (e.g. the FDA MedWatch program).
What is VO2 max?
VO2 max (maximal oxygen uptake) is the highest rate at which your body can take in and use oxygen during intense exercise. It is expressed in millilitres of oxygen per kilogram of body weight per minute (mL/kg/min): the higher the number, the more oxygen your heart, lungs and muscles can deliver and use, and the greater your aerobic capacity.
VO2 max matters far beyond athletic performance. In 2016 the American Heart Association recommended treating cardiorespiratory fitness as a clinical vital sign, noting it can predict mortality as strongly as traditional risk factors such as smoking, high blood pressure and type 2 diabetes. A large Cleveland Clinic study of more than 120,000 adults found that higher fitness was linked to lower all-cause mortality with no observed upper limit of benefit. For a plain-language overview, see the Cleveland Clinic guide to VO2 max.
How the VO2 max calculator works
A true VO2 max is measured in a laboratory with a graded exercise test and gas analysis. Because most people cannot access that, the VO2 max calculator uses validated field equations to estimate the same value from data you can gather with a stopwatch, a measured course or a heart-rate monitor. The two most common methods are shown below.
12-minute Cooper run test
Developed by Dr Kenneth Cooper in 1968 and validated against laboratory testing (correlation of about r = 0.90), the 12-minute run is the best-known field estimate. You run as far as possible in 12 minutes on a flat course, then apply the formula:
VO2 max = (distance in metres − 504.9) ÷ 44.73
For example, covering 2,400 metres gives an estimated VO2 max of about 42 mL/kg/min. The original method is described in Cooper’s 1968 JAMA paper.
1.5-mile run test
If you prefer a fixed distance, run 1.5 miles as fast as you can and record your time. A common estimate is VO2 max = (483 ÷ time in minutes) + 3.5. Faster times produce higher estimates. As with any running test, pacing, wind, hills and effort all affect the result, so repeat the test under similar conditions when tracking progress.
Cycling and other activities
Cyclists can estimate VO2 max from a maximal effort or from power output relative to body weight, and rowers, walkers and swimmers have their own protocols. Whatever the activity, the principle is identical: the more oxygen your body sustains at maximal effort, the higher your VO2 max. Use the same activity and conditions each time so your numbers stay comparable.
Resting and maximum heart rate method
The simplest, exercise-free estimate uses the ratio of your maximum to resting heart rate. The Uth–Sørensen–Overgaard–Pedersen heart-rate ratio method (2004) is:
VO2 max ≈ 15.3 × (HR max ÷ HR rest)
Maximum heart rate is often estimated as 208 − (0.7 × age), and resting heart rate is best measured first thing in the morning. This method is convenient but the least precise, because resting heart rate shifts with caffeine, stress, hydration and sleep.
What is a good VO2 max by age and sex?
“Good” always depends on your age and sex, because VO2 max naturally declines with age and average values differ between men and women. The table below shows approximate average values (around the 50th percentile); a score comfortably above your row is generally considered good to excellent. Well-trained endurance athletes often reach 65–85+ mL/kg/min.
| Age group | Men (average) | Women (average) |
|---|---|---|
| 20–29 | 44 | 37 |
| 30–39 | 42 | 35 |
| 40–49 | 39 | 33 |
| 50–59 | 35 | 30 |
| 60–69 | 32 | 27 |
| 70+ | 28 | 24 |
Representative averages drawn from ACSM and Cooper Institute normative data and the FRIEND registry. Exact category boundaries vary between reference systems, so treat these as a guide rather than a diagnosis. Compare your own trend over time using our target heart rate calculator and maximum heart rate calculator.
VO2 max and longevity
A higher VO2 max is one of the most consistent markers of long-term health. In the Cleveland Clinic cohort, the least-fit group carried a substantially higher risk of death than the fittest, and the benefit continued rising with fitness. The encouraging part is that the biggest gains come from moving off the very bottom: consistent aerobic training can raise an untrained person’s VO2 max by roughly 15–20% within a few months. Pair aerobic sessions with recovery tracking using our running pace calculator to structure easy and hard days.
Frequently asked questions
How do you calculate VO2 max?
You calculate VO2 max by entering results from a field test into a validated equation. The most common is the Cooper 12-minute run: VO2 max = (distance in metres − 504.9) ÷ 44.73. Other options use a 1.5-mile run time or the ratio of your maximum to resting heart rate. Each gives an estimate in mL/kg/min.
Can you calculate VO2 max from heart rate?
Yes. The heart-rate ratio method estimates VO2 max as about 15.3 × (maximum heart rate ÷ resting heart rate). It requires no exercise test, which makes it convenient, but it is the least precise method because resting heart rate varies from day to day.
What is a good VO2 max for my age?
A good VO2 max is one comfortably above the average for your age and sex. Average values fall from around 44 mL/kg/min for men and 37 for women in their twenties to roughly 28 and 24 by age 70. Scoring above your age-group average is where most of the health benefit lies.
Does the Oura Ring or Apple Watch calculate VO2 max?
Wearables such as the Oura Ring, Apple Watch and Garmin devices estimate VO2 max from heart-rate and movement data during activity, rather than measuring oxygen directly. They are useful for tracking trends over time, but individual readings can differ from a laboratory value, so treat them as estimates.
How accurate is a VO2 max calculator?
A VO2 max calculator gives a reasonable estimate rather than a laboratory measurement. Running-based formulas like the Cooper test correlate well with lab testing when you give a genuine maximal effort, while heart-rate methods are more approximate. For clinical purposes, a graded exercise test with gas analysis remains the gold standard.
Can VO2 max predict life expectancy?
VO2 max is strongly associated with all-cause mortality in large studies, so it is a powerful indicator of long-term health, but it is not a precise prediction of any individual’s lifespan. Improving your fitness lowers your statistical risk; it does not guarantee an outcome.
