VO2 max is the maximum volume of oxygen your body can use during intense exercise, expressed in millilitres per kilogram of body weight per minute (mL/kg/min). It is the gold-standard measure of aerobic fitness.

What is a good VO2 max?

For a 30-year-old male, 'excellent' is roughly 51+ mL/kg/min; for a 30-year-old female, 41+. The calculator shows an age- and sex-adjusted rating based on ACSM/Cooper Institute norms.

Which test should I use?

Cooper 12-minute is the classic — run as far as possible in 12 minutes. The 1.5-mile run is faster but requires you to push close to maximum pace. Resting HR is non-exertional and useful for unfit individuals.

How accurate are these tests?

Field tests typically come within ±10% of laboratory VO2 max. The resting HR method is least accurate (±15%) but easiest. For training prescription, treat the result as a directional benchmark.

🏃 VO2 Max Calculator

Estimate your aerobic fitness with three of the most-used tests: Cooper 12-minute, 1.5-mile run, and resting heart rate.

Sex

Age

Distance covered in 12 minutes

⚠️ Safety first. Running tests are submaximal-to-maximal effort. Warm up, do them on a flat surface, and consult a doctor first if you have any cardiovascular concerns.

About the VO2 Max Calculator

VO2 max measures how efficiently your body delivers oxygen to working muscles during exercise. It is widely regarded as the single best predictor of aerobic fitness and a strong long-term health marker.

Three tests, one number

Cooper 12-minute run — distance covered in 12 minutes at maximum sustainable pace. Formula: VO2 = (distance in metres − 504.9) / 44.73.
1.5-mile run — VO2 = 88.02 + 3.716·(sex 1/0) − 0.0753·(weight) − 2.767·(time in min). Simplified field form used here.
Resting heart rate (Uth–Sørensen–Overgaard) — VO2 = 15 × (HR_max / HR_rest). Cheapest, least accurate.

What's a good number?

Approximate "excellent" thresholds (ACSM / Cooper Institute):

Men 20–29: 53+ · 30–39: 49+ · 40–49: 45+ · 50–59: 42+
Women 20–29: 44+ · 30–39: 41+ · 40–49: 38+ · 50–59: 35+

Frequently Asked Questions

Is VO2 max trainable? Yes — most adults can improve by 15–25% over 6–12 months with consistent zone-2 cardio plus weekly intervals.

What's the difference between VO2 max and aerobic capacity? They're often used interchangeably. Strictly, "aerobic capacity" can refer to lactate-threshold pace, which is closer to your sustainable race pace.

Can I use a smartwatch instead? Yes — Garmin, Apple Watch and Fitbit estimate VO2 max during runs from heart rate and pace. Field tests like the Cooper are usually within ±5% of those estimates.

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Important Note: Estimates are not a substitute for laboratory testing or medical advice. Consult a doctor before maximal-effort exercise if you have cardiovascular risk factors.

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