# Free online VO2 max calculator

> VO2 max is the maximum rate at which your body can use oxygen during exercise — the gold standard measure of aerobic fitness. This calculator estimates it from four simple field.

Estimate your VO2 max from a Rockport walk test, Cooper 12-minute run, resting heart rate, or 1.5-mile run. Shows fitness category and approximate percentile.

**Interactive version:** https://onlinecalculator.me/health/vo2-max/
**Category:** Health

## How to use

1. Select your biological sex (affects fitness category thresholds).
2. Enter your age.
3. Choose a test method from the dropdown.
4. Fill in the measurements for your chosen test.
5. Click **Calculate VO2 Max** to see your result and fitness category.

## Test methods

### Rockport 1-mile walk test
Source: Kline GM et al. *Med Sci Sports Exerc.* 1987;19(3):253-259.

```
VO2max = 132.853
       − (0.0769 × weight_lbs)
       − (0.3877 × age)
       + (6.315 × isMale)     [1 if male, 0 if female]
       − (3.2649 × time_min)
       − (0.1565 × heartRate)
```

### Cooper 12-minute run test
Source: Cooper KH. *JAMA.* 1968;203(3):201-204.

```
VO2max = (distance_meters − 504.9) / 44.73
```

### Resting heart rate method (Uth et al.)
Source: Uth N et al. *Eur J Appl Physiol.* 2004;91(1):111-115.

```
VO2max = 15 × (maxHR / restingHR)
maxHR  = 220 − age
```

### 1.5-mile run method
Source: U.S. Army Physical Readiness Training manual.

```
VO2max = 3.5 + 483 / time_min
```

## Fitness categories

| Category | Male (mL/kg/min) | Female (mL/kg/min) |
|---|---|---|
| Poor | < 35 | < 28 |
| Fair | 35–41.9 | 28–33.9 |
| Good | 42–49.9 | 34–40.9 |
| Excellent | 50–55.9 | 41–46.9 |
| Superior | ≥ 56 | ≥ 47 |

Source: ACSM Guidelines for Exercise Testing and Prescription, 11th ed.

## Worked example (Rockport)

- Male, age 30, weight 165 lbs, walk time 15 min, heart rate 130 bpm
- VO2max = 132.853 − (0.0769 × 165) − (0.3877 × 30) + 6.315 − (3.2649 × 15) − (0.1565 × 130)
- = 132.853 − 12.69 − 11.63 + 6.315 − 48.97 − 20.35 ≈ **45.5 mL/kg/min** (Good)

## Notes

- All estimates are approximations. Lab-based VO2 max testing with direct gas analysis is more accurate.
- This calculator is for informational fitness tracking — not medical diagnosis.

## Frequently asked questions

### What is VO2 max?

VO2 max (maximal oxygen uptake) is the maximum volume of oxygen your body can consume per minute per kilogram of body weight, expressed in mL/kg/min. It is the most widely used measure of aerobic fitness and cardiovascular endurance.

### Which test method is most accurate?

The Rockport 1-mile walk test and Cooper 12-minute run test are validated field tests with published research behind their equations. The resting heart rate method (Uth et al.) and the 1.5-mile run are simpler approximations. For the most accurate result, a graded exercise test in a lab with direct gas analysis is the gold standard.

### What is a good VO2 max?

For males, VO2 max above 50 mL/kg/min is considered Excellent and above 56 is Superior. For females, above 41 is Excellent and above 47 is Superior. Elite endurance athletes often reach 70–85+ mL/kg/min. Typical healthy adults are in the 35–50 range.

### How do I do the Rockport 1-mile walk test?

Walk one mile as fast as you can (without running) on a flat surface. Immediately at the finish, measure your heart rate (use a heart rate monitor or count beats for 15 seconds and multiply by 4). Record the total walk time in minutes and your weight. Enter these into the calculator.

### How do I do the Cooper 12-minute run test?

Run (or walk-run) as far as possible in exactly 12 minutes on a flat surface. Measure the distance covered in meters and enter it into the calculator.

## Sources

- [Estimation of VO2 max from a one-mile track walk](https://pubmed.ncbi.nlm.nih.gov/3600239/) — Medicine & Science in Sports & Exercise
- [A means of assessing maximal oxygen intake](https://doi.org/10.1001/jama.1968.03140030033008) — JAMA
- [Estimation of VO2 max from the ratio between HR max and HR rest](https://pubmed.ncbi.nlm.nih.gov/14624296/) — European Journal of Applied Physiology

## Related calculators

- [Running pace calculator](https://onlinecalculator.me/health/running-pace/) — Calculate pace per mile or km from any race distance and finish time.
- [Heart rate zones calculator](https://onlinecalculator.me/health/heart-rate-zones/) — Find your five training zones from max heart rate or estimated max.
- [BMR calculator](https://onlinecalculator.me/health/bmr/) — Basal metabolic rate — calories burned at rest by your body.
- [Max heart rate calculator](https://onlinecalculator.me/health/max-hr/) — Estimate maximum heart rate from age using multiple formulas.

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