How it works
Heart Rate Calculator - Target HR Zones & VO2max Estimate
Calculate your maximum heart rate using the Tanaka formula (208 − 0.7 × age) and personalized target zones using the Karvonen method (Fat Burn, Cardio, Peak).
Estimate cardio fitness (VO2max) from resting heart rate, assess recovery category, and track resting HR trends over time.
Lower resting HR generally indicates better cardiovascular fitness. Normal range: 60–100 BPM for adults.