🫁 VO2 Max Calculator

Estimate your VO2 max — the gold-standard measure of cardiovascular fitness — using three proven methods: the Heart Rate Method, Cooper 12-Minute Run Test, or Rockport 1-Mile Walk Test. Find out how you rank against your age group.

Uses the ratio of your maximum to resting heart rate (Uth et al. formula). Most accessible method — no running required.

Max Heart Rate (bpm)

Estimate: 220 − your age

Resting Heart Rate (bpm)

Measure first thing in the morning

Formulas Used

Heart Rate Method (Uth et al., 2004)

VO2max = 15 × (HRmax ÷ HRrest)

Based on the observation that the ratio of maximum to resting heart rate strongly predicts maximal oxygen uptake. Easy to use without any running test.

Cooper 12-Minute Run Test (Cooper, 1968)

VO2max = (distance_metres − 504.9) ÷ 44.73

Developed by Dr. Kenneth Cooper for the US Air Force. Run as far as possible in 12 minutes on a flat surface. One of the most validated field tests for aerobic fitness.

Rockport 1-Mile Walk Test (Kline et al., 1987)

VO2max = 132.853 − (0.0769 × weight_lbs)

− (0.3877 × age) + (6.315 × gender)

− (3.2649 × time_min) − (0.1565 × HR)

gender = 1 for male, 0 for female

Ideal for older adults or those unable to run. Walk 1 mile at maximum sustainable pace on a flat track, then immediately measure your heart rate.

How to Use This Calculator

1

Choose a Method

Heart Rate Method is the simplest — just know your max and resting HR. Cooper Test gives a performance-based result. The Rockport Walk Test is best for older adults or beginners.
2

Enter Your Measurements

Input values carefully. For heart rate, measure resting HR first thing in the morning before getting up. For the Cooper test, warm up properly before the 12-minute effort.
3

Calculate Your VO2 Max

Click Calculate to get your estimated VO2 max in mL/(kg·min), the internationally accepted unit for maximal oxygen uptake.
4

Check Your Fitness Level

Compare your score to the fitness category table. Values are referenced against age and gender norms to give you meaningful context.

Example Calculation

Heart Rate Method: Max HR 190 bpm, Resting HR 60 bpm:

VO2max = 15 × (190 ÷ 60)

VO2max = 15 × 3.167

VO2max = 47.5 mL/(kg·min)

→ Classified as Good for a male aged 30–39

Cooper Test: Distance covered = 2,800 metres in 12 minutes:

VO2max = (2800 − 504.9) ÷ 44.73

VO2max = 2295.1 ÷ 44.73

VO2max = 51.3 mL/(kg·min)

Frequently Asked Questions

What is VO2 Max?

VO2 max (maximal oxygen uptake) is the maximum rate at which your body can consume oxygen during intense exercise. It is measured in millilitres of oxygen per kilogram of body weight per minute (mL/kg/min). It is considered the gold standard for assessing cardiovascular fitness and aerobic endurance capacity.

What is a good VO2 Max?

A VO2 max above 52 mL/kg/min is considered Excellent for men, and above 45 for women. Average untrained men score around 40–45, and women around 30–37. Elite endurance athletes typically exceed 70 mL/kg/min, with exceptional cases like cross-country skiers exceeding 90.

How can I improve my VO2 Max?

The most effective way to raise VO2 max is high-intensity interval training (HIIT) — alternating short bursts of near-maximal effort with recovery periods. Consistent aerobic training (running, cycling, rowing) at 70–85% of max HR also produces gains. Most people can improve their VO2 max by 10–20% with a structured 8–12 week programme.

Is the heart rate method accurate?

The Uth et al. heart rate method correlates well with laboratory measurements (r ≈ 0.85) and is a valid estimation tool. Its main limitation is that your true max HR may differ from the 220−age estimate. For best results, use an actual recorded maximum heart rate from a hard effort. The Cooper and Rockport tests tend to be slightly more accurate as they measure real exercise performance.