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Target Heart Rate Calculator
Heart rate zones using 220 − age, or Karvonen if you add resting HR.
Enter Details
(age 10 to 100 only)
Resting heart rate (optional)
If provided, uses Karvonen (heart rate reserve).
Result
Training zones from age (and optional resting HR).
Note — This result is an estimate. Talk to a healthcare provider for personalized guidance.