Good VO2 Max by Age Lookup

VO2 max describes the highest rate at which the body can take in oxygen, deliver it through the blood, and use it during hard sustained exercise. The relative unit, ml/kg/min, means milliliters of oxygen per kilogram of body mass per minute. That body-mass adjustment lets a runner, cyclist, or recreational exerciser compare a single number with age-based reference ranges instead of reading only an absolute oxygen-use value in liters per minute.

A Good VO2 max is not a universal number. Age, reference sex, training background, altitude exposure, recent illness, body-weight changes, medication effects, and measurement method can all change the comparison. A value such as 44 ml/kg/min can sit in the Good band for one adult cohort and below or above that band for another, so the reference row matters as much as the number itself.

VO2 max and VO2 max rating are related but not identical. VO2 max is the measured or estimated oxygen-use capacity. A label such as Poor, Fair, Good, Excellent, or Superior is a percentile-style comparison against a source table. The same measured value can receive a different rating when the age cohort or reference sex changes.

Everyday VO2 max values often come from watches, field tests, treadmill or bike protocols, or laboratory gas analysis. Each method carries its own error range. Heat, altitude, fatigue, recent sickness, device heart-rate accuracy, and body-weight changes can move an estimate even when aerobic fitness has not changed by the same amount.

Rating bands are useful for orientation, trend review, and training conversations, but they are not medical clearance, a diagnosis, or an exercise prescription. Chest symptoms, cardiovascular or pulmonary conditions, pregnancy, recent illness, unusual fatigue, and major medication changes need professional guidance before exercise intensity changes.

How to Use This Tool:

Start by selecting the comparison row, then add a measured value only when you want that value classified against the same thresholds.

1. Enter Age as a whole number from 20 to 79 years. The lookup maps the value to a decade cohort such as 30-39 or 40-49.
2. Choose Reference sex. The male and female source rows use different floors for Fair, Good, Excellent, and Superior.
3. Open Advanced only if you already have a VO2 max estimate. Enter Measured VO2 max in ml/kg/min; the lookup does not estimate VO2 max from pace, distance, heart rate, or power.
4. Set Decimals to 0, 1, or 2 places when you need cleaner display values. This rounds displayed numbers only and does not change the source thresholds.
5. Read Good VO2 Band for the selected cohort's Good range, then check VO2 Rating Table for the full Poor through Superior ladder.
6. Use VO2 Reading Guide for context notes and VO2 Rating Ladder to compare the source floors across age cohorts.
7. If an error appears, keep age within 20 to 79 and make the optional measured value positive. If a warning appears below 15 or above 90 ml/kg/min, recheck the source value and unit before relying on the rating.

When saving or sharing a result, keep the age cohort, reference sex, Good band, measured rating, and next-tier gap together. A VO2 max value without its comparison row is easy to misread.

Interpreting Results:

The Good band begins at the Good floor and ends just before the Excellent floor. A measured value equal to the Good floor is Good. A measured value equal to the Excellent floor is Excellent, not Good.

• Good VO2 max band shows the Good range for the selected adult cohort in ml/kg/min.
• Measured rating appears only when a positive measured value is entered, and it uses the same cohort row as the Good band.
• Next tier gap reports how many ml/kg/min are needed to reach the next rating floor, or how far a Superior value sits above the Superior floor.
• Source identifies the reference table used for the cohort floors.

Treat a near-boundary rating as approximate. Repeating the same test method under similar conditions is a better confidence check than switching between a watch estimate, field test, and lab test.

Technical Details:

Relative VO2 max combines oxygen uptake, body mass, and time. The relative unit makes adults of different sizes easier to compare, but it also means a body-weight change can shift the value even when absolute oxygen uptake changes less. Laboratory testing measures respiratory gases during graded exercise, while field tests and watches estimate the same capacity indirectly.

The reference table groups adults into six decade cohorts from 20-29 through 70-79 and separates male and female reference rows. Each row supplies floors for Fair, Good, Excellent, and Superior. Poor is the open-ended band below the Fair floor.

Formula Core

When absolute oxygen uptake is known, relative VO2 max converts liters per minute to milliliters per minute and divides by body mass in kilograms.

For example, 3.2 L/min at 70 kg equals about 45.7 ml/kg/min. The optional measured value must already be relative VO2 max in ml/kg/min; no pace, distance, heart-rate, cycling-power, or body-weight estimate is calculated here.

Lookup and Rule Core

Age and reference sex select one source row. Rating bands use inclusive lower floors and exclusive upper floors, except Superior, which has no upper cap.

The next-tier gap is the difference from the measured value to the next higher floor. Once a value is Superior, the display changes to show how far the value sits above the Superior floor.

The Good band is bounded by the 60th-percentile floor and the 80th-percentile floor for the selected row. The upper value is exclusive because the Excellent band starts at that floor.

Limitations:

VO2 max ratings are adult reference comparisons for fitness context. They do not replace clinical assessment, and they cannot explain why a value changed.

• The source table covers ages 20 through 79 only.
• Age is grouped by decade, so age 39 and age 40 can use different rows.
• Wearable and field-test estimates can differ from laboratory gas-analysis results.
• Male and female rows are reference categories, not a complete model of individual physiology.
• Recent illness, unusual fatigue, symptoms, or medical risk factors need professional guidance rather than a rating table alone.

Worked Examples:

A 35-year-old using the male reference table maps to the 30-39 cohort. Good VO2 max band shows 44.0 to under 48.3 ml/kg/min, so an entered measured value of 44.0 ml/kg/min is rated Good.

A 52-year-old using the female reference table maps to the 50-59 cohort. The Good band is 33.0 to under 36.7 ml/kg/min. A measured value of 36.7 ml/kg/min is Excellent because the Excellent floor is inclusive, and Next tier gap shows 4.4 to reach Superior.

A 40-year-old using the male reference table enters 9.8 ml/kg/min and sees a warning. The value can still be classified as Poor, but Warnings asks for a source or unit check because 9.8 is unusually low for most adult VO2 max estimates; in this cohort, Next tier gap is 28.7 to reach Fair.

FAQ:

Glossary:

VO2 max

The highest oxygen-use capacity reached during hard sustained exercise.

ml/kg/min

Milliliters of oxygen per kilogram of body mass per minute, the relative VO2 max unit used in the lookup.

Age cohort

The decade group used for the reference row, such as 30-39 or 60-69.

Reference sex

The male or female comparison table used to choose the rating floors.

Good floor

The 60th-percentile threshold where the Good rating begins for the selected cohort.

Next-tier gap

The difference between a measured value and the next higher rating floor.

References:

• VO2 Max. Standard Ratings, Garmin, April 2026.
• Importance of Assessing Cardiorespiratory Fitness in Clinical Practice: Top Things to Know, American Heart Association, November 21, 2016.
• How Can Increasing Your VO2 Max Improve Your Fitness and Health?, Cleveland Clinic, April 8, 2026.