Free fitness calculator
Heart Rate Zones Calculator
Estimate cardio training zones using age and resting heart rate.
Why zones matter
Heart rate zones help separate easy recovery work from harder conditioning sessions.
Use with common sense
Formulas are imperfect. Breathing, pace and perceived effort still matter.
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Search queries this calculator helps answer
This page is written for people looking for quick calculator-style answers, including these common search phrases:
- heart rate zones calculator
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How to use the result
Use the calculator output as a starting estimate. Check the assumptions, compare it to real-world results, and adjust if your situation changes.