Heart Rate Zones Calculator
Calculate personalized training zones using percent max or Karvonen method.
Heart Rate Zones
Info only. Not medical advice.
Heart Rate Zones
Enter your details to calculate training zones.
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Learn more about Heart Rate Zones
Why Heart Rate Zones Matter
Training in specific heart rate zones helps target different energy systems. Lower zones build aerobic endurance and recovery, while higher zones improve speed and VO2 max.
- Zone 2 is ideal for steady-state endurance work.
- Zone 3-4 improves tempo and threshold performance.
- Zone 5 is best reserved for short, intense intervals.
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