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health.vo2max-estimate Calculator
Estimates VO₂max from resting heart rate, age, and sex using the Uth-Sørensen formula, and classifies fitness level. The Uth formula (15 × HRmax/HRrest) provides a reasonable estimate without exercise testing — accurate to within ±10% for most sedentary to moderately fit individuals.
Inputs
Age
Age in completed years. Many health and fitness formulas adjust for age.
Resting Hr
Beats per minute at complete rest (best measured first thing in the morning). Average adult: 60–100 bpm. Trained athletes often 40–60.
Max Hr
Estimated upper ceiling for your heart rate. Rough estimate: 220 minus age. Training above 85–90% of this for extended periods is inadvisable.
Sex
Reference formula or conversion factor shown for context.
Results
estimated VO2max (mL/kg/min)
The value at the specified point or condition.
fitness level
The measured or computed level on the applicable scale.
max heart rate
The value at the specified point or condition.
resting HR
Sample size or count used in the calculation.
HR ratio
The proportional relationship between two quantities.