VO2 Max Calculator
VO2 max is the maximum amount of oxygen your body can use during exercise, one of the best measures of cardio fitness. Pick a simple field test you can do, enter your result, and see your estimated VO2 max and fitness rating for your age and sex.
VO2 max measures the maximum milliliters of oxygen your body can consume per kilogram of bodyweight per minute (ml/kg/min). It is widely regarded by cardiologists and exercise physiologists as the single best objective indicator of cardiorespiratory fitness and long-term vitality.
Estimated VO2 Max
Superior (Men aged 30)VO2 max is the gold standard measurement of cardiorespiratory fitness. Your score of 51.3 ml/kg/min rates as "Superior" according to American College of Sports Medicine (ACSM) normative fitness tables.
Assessment Method
Cooper 12-minute run
Validated aerobic field protocol
Normative Bracket
Superior
ACSM age 30 cohort percentile
ACSM Cardiorespiratory Fitness Classifications
| Fitness Level | Percentile Rank | Physiological Profile |
|---|---|---|
| Superior | > 95th percentile | Elite competitive aerobic fitness |
| Excellent | 80th – 95th percentile | High cardiovascular capacity and stamina |
| Good | 60th – 80th percentile | Active, healthy cardiovascular endurance |
| Fair | 40th – 60th percentile | Average population aerobic capacity |
| Poor / Very Poor | < 40th percentile | Sedentary; substantial health gains from brisk cardio |
Source: ACSM's Guidelines for Exercise Testing and Prescription, normative data compiled by The Cooper Institute.
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Clinical Equations
WHO, CDC, ACSM & Mifflin-St Jeor
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How to use VO2 Max Calculator
- 1Select an assessment protocol: Cooper 12-min run, 1.5-mile run, Rockport walk, or Resting HR.
- 2Enter your age, sex, and test completion metrics (distance, time, or heart rate).
- 3Review your calculated VO2 max score.
- 4Compare your aerobic capacity against official ACSM / Cooper Institute normative percentiles.
Field test protocols explained
The Cooper 12-minute run test measures total distance covered in meters. Formula: (Distance − 504.9) / 44.73.
The Rockport 1-mile walk test uses walking time and post-exercise heart rate, making it ideal for non-runners or older adults.
The Uth-Sørensen ratio estimates VO2 max from resting heart rate: 15.3 × (HRmax / HRrest).
Frequently Asked Questions
What is a good VO2 max?
It depends on age and sex; see the chart. Higher values are linked with longer life.
How accurate are VO2 max field tests?
Reasonably good for tracking your own progress; lab tests are more precise.
Can I improve my VO2 max?
Yes, with interval training and regular endurance exercise, often by 10 to 20% in a few months for beginners.
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Scientific Sources & Evidence
- World Health Organization (WHO) — Body Mass Index Classification
- CDC Growth Charts — BMI-for-age LMS Percentiles
- Mifflin et al. (1990) — Basal Metabolic Rate Predictive Equations
- NICE Guideline NG246 — Identification and Management of Overweight and Obesity
- American College of Sports Medicine (ACSM) — Exercise Testing & Prescription
- European Food Safety Authority (EFSA) — Dietary Reference Values for Water