Fat Burning Zone Calculator

The fat burning zone calculator helps you calculate your heart rate reserve, 60-80% of maximum heart rate, and fat burning zone by the Zoladz and Karvonen method.

Enter your age, resting heart rate (bpm), and maximum heart rate to find out the fat burning zone.

Heart rate reserve is the difference between your maximum and resting heart rates.

Zoladz Method: MAP helps find the heart rate deflection point (HRDP), which is used to find the power output’s functional threshold heart rate (LTHR or FTHR).

The Karvonen method, often known as the heart rate reserve (HRR) formula, uses the difference between your maximum and resting heart rates to calculate your HRR. HRR = HRmax – RHR (RHR).

Fat Burning Zone Calculator

You might be interested in Fasting or heart rate calculator.


  • SYOUBO, A., SUSAKI, T., DEGUCHI, S., HIROSE, N., OKU, T., & TACHINO, K. (2011). Physiological Responses to Exercise Loads set by the Karvonen Method. Rigakuryoho Kagaku26(1).
  • Scharff-Olson, M. I. C. H. E. L. E., Williford, H. N., & Smith, F. H. (1992). The heart rate VO2 relationship of aerobic dance: a comparison of target heart rate methods. The Journal of Sports Medicine and Physical Fitness32(4), 372-377.
  • Banach, T., Grandys, M., Juszczak, K., Kolasińska-Kloch, W., Zoładź, J., Laskiewicz, J., & Thor, P. J. (2004). Heart rate variability during incremental cycling exercise in healthy untrained young men. Folia medica Cracoviensia45(1-2), 3-12.
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