VO2 Max Estimator

Age Input

Your age is used to estimate maximal heart rate, a key variable in the Uth formula.

• Valid range: 10 – 99 years
• HRmax estimated as: 208 − (0.7 × age)
• Younger individuals tend to have higher VO2 max values

Resting Heart Rate

Measure your resting heart rate in beats per minute (bpm) after sitting quietly for 5 minutes.

• Valid range: 30 – 200 bpm
• Athletes may be as low as 35–45 bpm
• Typical adult range: 60–100 bpm
• Lower resting HR generally correlates with higher VO2 max

Fitness Test

An optional field test for a more accurate estimation. Supported tests:

• Rockport Walk Test — Walk 1 mile as fast as possible. Requires gender, weight, time, and post-exercise HR.
• Cooper 12-Min Run — Run as far as possible in 12 minutes. Requires distance in meters.
• None — Uses the Uth formula (age + resting HR only).

The Uth estimate is less accurate but requires no equipment beyond a heart rate monitor.

VO2 Max Result

Your estimated maximal oxygen uptake in mL/kg/min. This is a key indicator of cardiovascular fitness.

Classification ranges (adults):

• Superior: > 51.1
• Excellent: 46.8 – 51.1
• Good: 42.5 – 46.7
• Fair: 37.8 – 42.4
• Poor: 32.5 – 37.7
• Very Poor: < 32.5

Note: These are estimates. Consult a sports medicine professional for lab-grade testing.