⚡ Free online tool

Heart Rate Zone Calculator

Calculate training heart-rate zones from age and resting heart rate using the Karvonen method. Get an instant result without sign-up.

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About the Heart Rate Zone Calculator

Calculate training heart-rate zones from age and resting heart rate using the Karvonen method. This Caluler tool is designed for quick, transparent calculations with clearly labeled inputs.

How to use

  1. Enter the values requested above.
  2. Check the units and assumptions.
  3. Click Calculate to see your result instantly.

Formula & assumptions

Estimated max HR = 220 − age; zones use heart-rate reserve.

Who can use this calculator?

This free online calculator is useful for students, professionals, businesses, creators and everyday users who need a quick answer. Results depend on the information entered and the assumptions described above.

Keywords

heart rate zone calculator, target heart rate zones, Karvonen calculator, exercise heart rate

Important note

This tool provides estimates or mathematical results for general informational purposes. For financial, health, legal or other high-stakes decisions, verify the result with a qualified professional or authoritative source.