Side-by-side comparison helps you choose the right calculator for a specific clinical question.
Fitness
Estimate your VO2 max from resting heart rate using the Uth method. Assess your cardiorespiratory fitness level and aerobic capacity. Higher VO2 max correlates with lower cardiovascular risk — see [ASCVD Risk Calculator](/tools/ascvd-risk).
Formula
VO2 max = 15.3 × (Max HR / Resting HR)
Inputs
Fitness
Calculate your personal heart rate training zones using the Karvonen method. Optimize your cardio training with zones based on age and resting heart rate. Estimate aerobic capacity with [VO2 Max Estimator](/tools/vo2-max-calculator).
Formula
Target HR = Resting HR + (Max HR − Resting HR) × intensity %
Inputs